Arc extinguish chamber

Abstract

The utility model discloses an arc extinguish chamber which comprises an arc extinguish grid plate group, and an arc current sharing device is arranged in a path from one side close to a contact system to one side far away from the contact system in the arc extinguish grid plate group. The current sharing device is arranged between the arc extinguishing grid plates in the arc extinguishing chamber, so that the arc can have high arc voltage to enter the arc extinguishing grid plates in the rear end area, meanwhile, the moving speed of the arc is reduced, and the pressure maintaining time is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low voltage circuit breaker technical field, specifically speaking is related to a kind of arc-extinguishing chamber. BACKGROUND

[0002] Arc-extinguishing chamber is one of the basic methods of extinguishing arc, and arc-extinguishing chamber includes grid, gas generating element, air duct and gas outlet. The metal grid in arc-extinguishing chamber is stacked and arranged in a certain way. When arc is generated between contacts, arc is pulled into arc-extinguishing grid under the action of the contraction force of magnetic lines and the like. A long arc is divided into multiple short arcs. Arc voltage is increased to make fault current drop to achieve arc-extinguishing effect. In the existing low-voltage electrical field, the voltage that can be withstood by the direct-current switch can only reach DC 1500V. According to the latest development needs of low-voltage electrical industry, the current voltage that needs to be withstood by the direct-current switch will develop to AC 2000V and DC 3000V. The current product can only reach single-pole DC 750V and two-pole DC 1500V. The product on the market cannot meet the standard requirement of DC 2500V. Traditionally, DC 1500V product usually uses 4P. However, the product of 4P has large volume and high cost. In order to reduce cost, 2P / DC 1500V and 2P / DC 2000V products appear on the market. However, the voltage that needs to be withstood by each P of the product of 2P / DC 1500V and 2P / DC 2000V is high. With the increase of breaking current, the residence time of arc in arc-extinguishing grid becomes shorter. Arc quickly moves to the back of arc-extinguishing grid after entering the grid. It is difficult to maintain voltage. At the same time, arc quickly moves to the tail of arc-extinguishing grid, causing arc short circuit in the tail. On the other hand, with the opening direction of contact, there is time difference in the entry of arc into the grid. It is difficult to achieve high arc voltage. It is not conducive to the extinguishing of arc in arc-extinguishing chamber by arc-extinguishing grid. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at the defects that there is time difference in the entry of arc into the grid under the condition of high voltage, it is difficult to achieve high arc voltage, it is difficult for arc to enter arc-extinguishing chamber, and it is difficult to maintain voltage after arc quickly moves to the back of arc-extinguishing grid. A kind of arc-extinguishing chamber is provided. Flow equalizing device is arranged in the middle of arc-extinguishing grid in arc-extinguishing chamber. Arc can have high arc voltage to enter rear-end area arc-extinguishing grid. At the same time, arc moving speed is reduced, and voltage maintaining time is improved.

[0004] TECHNICAL SCHEME

[0005] In order to achieve the above technical purpose, the utility model provides a kind of arc-extinguishing chamber, it includes arc-extinguishing grid group, and its characterized in that: arc flow equalizing device is arranged in the path from the side close to contact system to the side far from contact system in arc-extinguishing grid group.

[0006] In one of the embodiments, the arc runner arrangement is arranged between the first arc runner group and the second arc runner group.

[0007] In one of the embodiments, the arc runner arrangement is arranged between the first arc runner group and the second arc runner group.

[0008] In one of the embodiments, the arc runner arrangement is arranged between the first arc runner group and the second arc runner group.

[0009] In one of the embodiments, the arc runner arrangement includes a flow plate, and the flow plate is provided with arc vias.

[0010] In one of the embodiments, the flow plate and the arc runner group are arranged in parallel.

[0011] In one of the embodiments, the arc runner arrangement includes a plurality of ribs, and the plurality of ribs are provided with arc passages.

[0012] In one of the embodiments, the plurality of ribs and the arc runner group are arranged in parallel, and the plurality of ribs are uniformly provided with arc passages.

[0013] In one of the embodiments, the arc runner arrangement includes a plurality of flow barriers, and the plurality of flow barriers are inserted into the paths of at least some of the arc runners from the side close to the contact system to the side away from the contact system or the plurality of flow barriers are inserted into the side of at least some of the arc runners away from the contact system.

[0014] In one of the embodiments, the plurality of flow barriers and the inserted at least some of the arc runners have arc passages.

[0015] Advantages

[0016] The utility model provides a kind of arc-extinguishing chamber, it includes arc-extinguishing grid piece group, arc-extinguishing grid piece group is provided with arc current equalizing device in the path from the side close to contact system to the side far from contact system.In arc-extinguishing chamber arc-extinguishing grid piece middle part is provided with current equalizing device, so that arc can have higher arc voltage to enter rear end area arc-extinguishing grid piece, simultaneously, reduce arc moving speed, improve pressure maintaining time. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be simply introduced to the drawing needed to be used in embodiment, it should be understood that the following drawing only shows certain embodiment of the utility model, so it should not be regarded as the limitation to range, for ordinary skilled person in the art, under the premise of not paying creative labor, other relevant drawings can also be obtained according to these drawings.

[0018] Figure 1 Figure 1 It is the installation schematic drawing of contact system and arc-extinguishing chamber in the utility model embodiment 1;

[0019] Figure 2 Figure 2 It is the installation three-dimensional schematic drawing of cuboid arc current equalizing device in the utility model embodiment 1;

[0020] Figure 3 Figure 3 It is the installation three-dimensional schematic drawing of cylindrical arc current equalizing device in the utility model embodiment 1;

[0021] Figure 4 Figure 4 It is the installation front view of cylindrical arc current equalizing device in the utility model embodiment 1;

[0022] Figure 5 Figure 5 It is the installation schematic drawing of contact system and arc-extinguishing chamber in the utility model embodiment 2;

[0023] Figure 6 Figure 6 It is the installation three-dimensional schematic drawing of arc current equalizing device in the utility model embodiment 3 Figure 1 ;

[0024] Figure 7 Figure 7 It is the installation three-dimensional schematic drawing of arc current equalizing device in the utility model embodiment 3 Figure 2 ;

[0025] Figure 8 Figure 8 It is the installation three-dimensional schematic drawing of arc current equalizing device in the utility model embodiment 4 Figure 1 ;

[0026] Figure 9 Figure 9 It is the installation three-dimensional schematic drawing of arc current equalizing device in the utility model embodiment 4 Figure 2 ;

[0027] Figure 2 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 10 Figure 3 is a schematic diagram of an arc current sharing device according to an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 11 Figure 5 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 1 Figure 6 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 7 is a schematic diagram of an arc current sharing device according to an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 12 Figure 9 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; Figure 2 Figure 10 is a schematic diagram of an arc current sharing device according to an embodiment of the present application; DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be clearly and completely explained below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only embodiments.

[0032] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application is for describing particular embodiments only and is not intended to be limiting of the present application. The terminology used in the specification of the present application is intended to correspond to the terminology used by a person of ordinary skill in the art to describe the technology of the present application. The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0035] Embodiment 1

[0036] Conventionally, the DC1500V product usually uses 4P, but the product volume of 4P is large and the cost is high; in order to reduce the cost, the 2P / DC1500V and 2P / DC2000V products appear in the market, but the 2P / DC1500V and 2P / DC2000V products need to withstand higher voltage per P, with the increase of breaking current, the residence time of arc in the arc extinguishing grid is shorter, the arc quickly transfers to the back of the arc extinguishing grid after entering the grid, and it is difficult to maintain pressure; at the same time, the arc moves to the tail of the arc extinguishing grid quickly, causing the arc short circuit phenomenon in the tail; on the other hand, with the opening direction of the contact, the arc enters the grid with a time difference, which cannot reach a high arc voltage value, which is not conducive to the arc entering the arc chamber to be extinguished by the arc extinguishing grid.

[0037] In order to solve the above technical problems, as shown in the accompanying Figure 1 The arc extinguishing chamber provided by the embodiment includes an arc extinguishing grid group 1, and an arc flow equalizing device 5 is arranged in the path from the side close to the contact system 2 to the side away from the contact system 2 in the arc extinguishing grid group 1. In the present embodiment, the direction from the side close to the contact system 2 to the side away from the contact system 2 is the up-down direction, and the direction perpendicular to the up-down direction along the opening direction of the moving and static contacts is the left-right direction. The upper side of the arc extinguishing grid group 1 is provided with a deionization structure 8. The contact system 2 includes a moving contact 3 and a static contact 4, and the arc generated by the breaking of the moving contact 3 and the static contact 4 can enter the arc chamber a and be cut off and extinguished by the arc extinguishing grid group 1. The side of the arc extinguishing grid group 1 corresponding to the maximum breaking position of the moving contact 3 is provided with a moving arc plate 101. The side of the arc extinguishing grid group 1 corresponding to the static contact 4 is provided with a static arc plate 102. Specifically, as shown in the accompanying Figure 1 The arc extinguishing grid group 1 is divided into an arc extinguishing grid group one 1a and an arc extinguishing grid group two 1b from the side close to the contact system 2 to the side away from the contact system 2, the arc extinguishing grid group one 1a and the arc extinguishing grid group two 1b are arranged side by side from the side close to the contact system 2 to the side away from the contact system 2, a space one 6 is arranged between the arc extinguishing grid group one 1a and the arc extinguishing grid group two 1b for arranging the arc flow equalizing device 5, and the projections of the arc extinguishing grid group one 1a and the arc extinguishing grid group two 1b on the vertical plane are at least partially overlapped. As shown in the accompanying Figure 2As shown, the arc current equalization device 5 comprises a plurality of ribs 5b, which are preferably arranged in parallel with the arc extinguishing grid 1, and arc passages 501 are arranged between the ribs. The arc passages 501 are preferably evenly arranged between the ribs. As shown in the accompanying Figure 3 As shown, the ribs are preferably cuboids, and both ends thereof are mounted on side plates (not shown in the drawings). Meanwhile, as shown in the accompanying Figure 5 and 4 As shown, the ribs can also be cylinders.

[0038] The arc extinguishing process of the embodiment is as follows: in the initial stage of arc striking, the arc enters the grid along the static arc striking plate 102; in the early stage of arc running, the arc at the static contact end quickly runs to the upper part of the arc extinguishing grid group la close to the static contact 4, and under the action of the arc current equalization device 5, the arc transfer speed at the static end is slowed down, so that the arc at the moving contact end gradually enters the arc extinguishing grid group la; and in the late stage of arc running, under the influence of the arc current equalization device 5, the arc roots at the moving and static ends enter the grid synchronously, so that the arc voltage reaches the maximum in an instant.

[0039] Embodiment 2

[0040] As shown in the accompanying Figure 6 In the embodiment, as shown in the accompanying and

[0041] As shown, the arc current equalization device 5 comprises a flow equalization plate 5a, the flow equalization plate 5a is provided with arc through holes 5a01, and the flow equalization plate 5a and the arc extinguishing grid 1 are arranged in parallel. As shown in the accompanying As shown, the arc through holes 5a01 are circular holes or as shown in the accompanying

[0042] As shown, the arc current equalization device 5 comprises a flow equalization plate 5a, the flow equalization plate 5a is provided with arc through holes 5a01, and the flow equalization plate 5a and the arc extinguishing grid 1 are arranged in parallel. As shown in the accompanying Figure 6 and 7 As shown, the arc current equalization device 5 comprises a flow equalization plate 5a, the flow equalization plate 5a is provided with arc through holes 5a01, and the flow equalization plate 5a and the arc extinguishing grid 1 are arranged in parallel. As shown in the accompanying Figure 7 As shown, the arc through holes 5a01 are circular holes or as shown in the accompanying Figure 8The square hole shown. Other structures are the same as in Example 1.

[0043] Example 4

[0044] In this embodiment, as shown in the appendix Figure 10 and 9 As shown, the arc current equalization device 5 includes several current equalization baffles 5c, as illustrated in the attached diagram. Figure 8 The several current equalization baffles 5c shown are connected at one end by a fixing plate 5d, and the other end is inserted into the side of at least some of the arc-extinguishing grid plates 101 in the arc-extinguishing grid plate group 1 away from the contact system 2. An arc channel 502 exists between the several current equalization baffles 5c and the inserted at least some of the arc-extinguishing grid plates 101, allowing the arc to pass through. That is, the thickness of the current equalization baffle 5c is less than the gap between adjacent arc-extinguishing grid plates. The current equalization baffle 5c can be located between adjacent arc-extinguishing grid plates, or it can be attached to one of the adjacent arc-extinguishing grid plates. The width of the current equalization baffle 5c can be the same as or narrower than the arc-extinguishing grid plate. When the width of the current equalization baffle 5c is narrower than the grid plate, there is a gap between the grid plates in the narrower portion, forming an arc channel 502. In this case, the thickness of the current equalization baffle 5c can be the same as or substantially the same as the gap between adjacent arc-extinguishing grid plates. In this embodiment, the other end of the several current equalization baffles 5c can be as shown in the attached figure. Figure 9 The arc-extinguishing grid plates 101 shown are inserted on the side of the arc-extinguishing grid plate assembly 1 away from the contact system 2, or as shown in the attached figure. Figure 11 The arc-extinguishing grid 101 shown is inserted on the side of the arc-extinguishing grid assembly 1 away from the contact system 2.

[0045] Example 5

[0046] In this embodiment, the plurality of current equalization baffles 5c are inserted into the path of at least some of the arc-extinguishing grid plates 101 in the arc-extinguishing grid plate group 1 from the side near the contact system 2 to the side away from the contact system 2. In this embodiment, as shown in the attached... Figure 12 As shown, the plurality of flow equalization baffles 5c are inserted into the path of all the arc-extinguishing grid plates 101 in the arc-extinguishing grid plate group 1 from the side closer to the contact system 2 to the side farther away from the contact system 2. Alternatively, as shown in the attached diagram... ​ The arc-extinguishing grid plate 101 shown is inserted into the arc-extinguishing grid plate assembly 1 along the path from the side closer to the contact system 2 to the side farther away from the contact system 2. In this embodiment, the width of the current equalization baffle 5c is narrower than that of the arc-extinguishing grid plate, although its width can also be the same. Other structural features are the same as in Embodiment 4.

[0047] The utility model provides a kind of arc extinguishing chamber, it includes arc extinguishing grid piece group 1, arc extinguishing grid piece group 1 is provided with arc current equalizing device 5 in the path from the side close to contact system 2 to the side far from contact system 2.In arc extinguishing chamber arc extinguishing grid piece middle is provided with current equalizing device, so that arc can have higher arc voltage to enter rear end area arc extinguishing grid piece, simultaneously, reduced arc moving speed, improved pressure maintaining time.

[0048] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0049] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be considered as a limitation on the scope of the patent of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An arc-extinguishing chamber, comprising an arc-extinguishing grid assembly (1), characterized in that: An arc current equalization device (5) is provided in the arc extinguishing grid assembly (1) along the path from the side closer to the contact system (2) to the side farther away from the contact system (2).

2. The arc-extinguishing chamber as described in claim 1, characterized in that: The arc-extinguishing grid assembly (1) is divided into arc-extinguishing grid assembly one (1a) and arc-extinguishing grid assembly two (1b) from the side closer to the contact system (2) to the side farther away from the contact system (2). The arc-extinguishing grid assembly one (1a) and arc-extinguishing grid assembly two (1b) are arranged side by side vertically from the side closer to the contact system (2) to the side farther away from the contact system (2). A space one (6) is provided between the arc-extinguishing grid assembly one (1a) and arc-extinguishing grid assembly two (1b) for arranging the arc current equalization device (5). The projections of the arc-extinguishing grid assembly one (1a) and arc-extinguishing grid assembly two (1b) on the plane in the vertical direction at least partially overlap.

3. The arc-extinguishing chamber as described in claim 1, characterized in that: The arc-extinguishing grid plate group (1) is divided into a first arc-extinguishing grid plate group (m) near the stationary contact (4) and a second arc-extinguishing grid plate group (n) away from the stationary contact (4) along the left and right horizontal direction. The first arc-extinguishing grid plate group (m) is divided into arc-extinguishing grid plate group three (1c) and arc-extinguishing grid plate group four (1d) from the side near the contact system (2) to the side away from the contact system (2). The arc-extinguishing grid plate group three (1c) and arc-extinguishing grid plate group four (1d) are arranged side by side vertically from the side near the contact system (2) to the side away from the contact system (2). A space two (7) is provided between the arc-extinguishing grid plate group three (1c) and arc-extinguishing grid plate group four (1d) for arranging the flow equalization device (5).

4. An arc-extinguishing chamber as described in claim 3, characterized in that: The projections of the third arc-extinguishing grid group (1c) and the second arc-extinguishing grid group (n) on the plane in the vertical left-right direction at least partially overlap; the projections of the fourth arc-extinguishing grid group (1d) and the second arc-extinguishing grid group (n) on the plane in the vertical left-right direction at least partially overlap; and the projections of the third arc-extinguishing grid group (1c) and the fourth arc-extinguishing grid group (1d) on the plane in the vertical direction at least partially overlap.

5. An arc-extinguishing chamber as described in claim 2 or 3, characterized in that: The electric arc current equalization device (5) includes a current equalization plate (5a), and the current equalization plate (5a) is provided with an electric arc through hole (5a01).

6. An arc-extinguishing chamber as described in claim 5, characterized in that: The flow equalization plate (5a) and the arc extinguishing grid group (1) are arranged in parallel.

7. An arc-extinguishing chamber as described in claim 2 or 3, characterized in that: The electric arc equalization device (5) includes a plurality of ribs (5b), and an electric arc passage (501) is provided between the plurality of ribs.

8. An arc-extinguishing chamber as described in claim 7, characterized in that: The plurality of ribs (5b) and the arc extinguishing grid group (1) are arranged in parallel, and an arc passage (501) is uniformly arranged between the plurality of ribs.

9. An arc-extinguishing chamber as described in claim 1, characterized in that: The arc current equalization device (5) includes a plurality of current equalization baffles (5c), which are inserted in the arc extinguishing grid plate group (1) along the path of at least some of the arc extinguishing grid plates (101) from the side near the contact system (2) to the side away from the contact system (2), or the plurality of current equalization baffles (5c) are inserted in the arc extinguishing grid plate group (1) on the side of at least some of the arc extinguishing grid plates (101) away from the contact system (2).

10. An arc-extinguishing chamber as described in claim 9, characterized in that: An arc channel (502) exists between the plurality of flow equalization baffles (5c) and at least some of the interlocking arc extinguishing grids (101).

Images