CN114360979A - Arc extinguishing grid structure - Google Patents
Arc extinguishing grid structure Download PDFInfo
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- CN114360979A CN114360979A CN202111554780.0A CN202111554780A CN114360979A CN 114360979 A CN114360979 A CN 114360979A CN 202111554780 A CN202111554780 A CN 202111554780A CN 114360979 A CN114360979 A CN 114360979A
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Abstract
The invention discloses an arc-extinguishing grid structure, which comprises a bottom grid sheet 1, two grid sheets 2, three grid sheets 3, four grid sheets 4, five grid sheets 5, a plurality of middle grid sheets 6 and a top grid sheet 7 which are sequentially stacked according to the same interval; two groups of same grid sheets are symmetrically arranged between the same layers (except the top grid sheet 7); the shape of the grid (except the grid 7 at the top layer) is formed by cutting V-shaped gaps with different depths into a rectangle, and the depth H of the V-shaped gaps is reduced in sequence according to the grid 1 at the bottom layer, the grid 2 at the two layers, the grid 3 at the three layers, the grid 4 at the four layers, the grid 5 at the five layers and the grid 6 at the middle layer; the depth H of the V-shaped gap of the top layer grid sheet 7 is the same as that of the middle layer grid sheet 6, and the middle part of the top layer grid sheet is connected in a strip shape to form a symmetrical integral structure at two sides; the thickness of the bottom grid sheet 1 is larger than that of the rest grid sheets, and the thickness of the rest grid sheets is the same; this structure is used for quick circuit breaker for rolling stock, forms the type of falling loudspeaker air current passageway in front of the contact, is favorable to electric arc to get into the arc extinguishing bars smoothly, reduces the time of arcing, and the bottom bars piece structure of thickening simultaneously promotes resistant electric arc scaling loss ability, and overall structure effectively promotes contact and arc extinguishing bars life, reduces use cost.
Description
Technical Field
The invention relates to a mechanical structure of a direct-current switch arc-extinguishing device of a quick circuit breaker for a locomotive vehicle, in particular to an arc-extinguishing grid structure.
Background
The direct current quick circuit breaker is provided with an arc extinguishing device at the position of a main contact, and is mainly used for quickly extinguishing high-temperature electric arc generated when the main contact is broken, reducing the burning loss of the electric arc to the contact and prolonging the electrical service life of the contact; the structure of the arc chute directly influences the arc breaking and extinguishing time.
At present, direct current quick circuit breaker arc chute structure adopts the sheetmetal of the same uniform thickness to form according to a determining deviation range upon range of usually, and this kind of structure is at the metal grid entry, and the difficult unobstructed entering of electric arc high temperature particle flow makes the breaking time extension at the entrance formation short-term retardation, simultaneously because the short-term of high temperature electric arc is detained for contact and the nearest contact department grid piece electric loss is serious, reduces the life of contact and arc chute.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The present invention provides an arc chute structure to solve the above technical problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
the arc-extinguishing grid structure comprises a bottom grid sheet 1, a second grid sheet 2, a third grid sheet 3, a fourth grid sheet 4, a fifth grid sheet 5, a plurality of middle grid sheets 6 and a top grid sheet 7;
the bottom grid sheet 1, the second grid sheet 2, the third grid sheet 3, the fourth grid sheet 4, the fifth grid sheet 5, the middle grid sheets 6 and the top grid sheet 7 are arranged in a stacked mode according to the same distance;
the bottom grid sheet 1, the second grid sheet 2, the third grid sheet 3, the fourth grid sheet 4, the fifth grid sheet 5 and the middle grid sheets 6 are symmetrically arranged by two groups of same grid sheets, and the top grid sheet 7 is of an integral structure.
Compared with the prior art, the arc-extinguishing grid structure provided by the invention has the advantages that under the condition of the same breaking capacity, the capacity of rapidly enabling arc particle flow to enter the arc-extinguishing grid is improved to the maximum extent, the arc burning time of an arc is reduced, the grid loss of a contact and the arc-extinguishing grid is reduced, the safety performance of a system is improved, and the use, maintenance and replacement costs are reduced.
Drawings
Fig. 1a is a schematic structural diagram of an arc chute structure according to an embodiment of the present invention;
FIG. 1b is a schematic sectional view A-A of FIG. 1 a.
Fig. 2 is a schematic diagram of the bottom-layer grid sheet profile structure according to the embodiment of the invention.
Fig. 3 is a schematic diagram of the top-layer gate sheet according to the embodiment of the invention.
In the figure:
1-bottom grid sheet, 2-two-layer grid sheet, 3-three-layer grid sheet, 4-four-layer grid sheet, 5-five-layer grid sheet, 6-middle-layer grid sheet and 7-top-layer grid sheet.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely described below by combining the attached drawings in the embodiment of the invention; it is to be understood that the described embodiments are merely exemplary of the invention, and are not intended to limit the invention to the particular forms disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The terms that may be used herein are first described as follows:
the term "and/or" means that either or both can be achieved, for example, X and/or Y means that both cases include "X" or "Y" as well as three cases including "X and Y".
The terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, process, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article of manufacture), is to be construed as including not only the particular feature explicitly listed but also other features not explicitly listed as such which are known in the art.
The term "consisting of … …" is meant to exclude any technical feature elements not explicitly listed. If used in a claim, the term shall render the claim closed except for the inclusion of the technical features that are expressly listed except for the conventional impurities associated therewith. If the term occurs in only one clause of the claims, it is defined only to the elements explicitly recited in that clause, and elements recited in other clauses are not excluded from the overall claims.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured," etc., are to be construed broadly, as for example: can be fixedly connected, can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.
The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship that is indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and are not intended to imply or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting herein.
Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention are not specified by manufacturers, and are all conventional products available by commercial purchase.
The arc-extinguishing grid structure comprises a bottom grid sheet 1, a second grid sheet 2, a third grid sheet 3, a fourth grid sheet 4, a fifth grid sheet 5, a plurality of middle grid sheets 6 and a top grid sheet 7;
the bottom grid sheet 1, the second grid sheet 2, the third grid sheet 3, the fourth grid sheet 4, the fifth grid sheet 5, the middle grid sheets 6 and the top grid sheet 7 are arranged in a stacked mode according to the same distance;
the bottom grid sheet 1, the second grid sheet 2, the third grid sheet 3, the fourth grid sheet 4, the fifth grid sheet 5 and the middle grid sheets 6 are symmetrically arranged by two groups of same grid sheets, and the top grid sheet 7 is of an integral structure.
The bottom layer grid sheet 1, the second layer grid sheet 2, the third layer grid sheet 3, the fourth layer grid sheet 4, the fifth layer grid sheet 5 and the middle layer grid sheets 6 are all formed by rectangular V-shaped notches with different cutting depths;
the top grid sheet 7 is a V-shaped notch cut by a rectangle, and the middle of the top grid sheet is connected by a strip to form a symmetrical integral structure at two sides.
The depth H of the V-shaped gap is sequentially reduced from a bottom grid plate 1, a second grid plate 2, a third grid plate 3, a fourth grid plate 4, a fifth grid plate 5 to a middle grid plate 6;
the depth H of the V-shaped gap of the top grid sheet 7 is the same as the depth H of the V-shaped gap of the middle grid sheet 6.
The thickness of the bottom grid sheet 1 is larger than that of the rest grid sheets, and the thickness of the rest grid sheets is the same.
The grid plate is made of low-carbon steel plates.
In conclusion, the arc-extinguishing grid structure provided by the embodiment of the invention has the advantages that the inverted horn-shaped airflow channel is formed in front of the contact by arranging the grid pieces with the front six layers with different V-shaped depths H, so that electric arcs can smoothly enter the arc-extinguishing grid structure, the arc burning time is shortened, and the electrical service life of the contact is prolonged; the bottom grid piece thickening structure effectively promotes the resistant electric arc burning loss ability, when satisfying practical application, prolongs the replacement cycle, reduces the cost of overhaul.
The arc-extinguishing grid structure provided by the invention has the advantages that under the condition of the same breaking capacity, the capacity of rapidly enabling arc particle flow to enter the arc-extinguishing grid is improved to the maximum extent, the arc burning time of an arc is reduced, the grid loss of a contact and the arc-extinguishing grid is reduced, the safety performance of a system is improved, and the using, overhauling and replacing costs are reduced.
In order to more clearly show the technical solutions and the technical effects provided by the present invention, the following detailed description is provided for the embodiments of the present invention with specific embodiments.
Example 1
As shown in fig. 1a and 1b, an arc chute structure includes a bottom grid 1, a second grid 2, a third grid 3, a fourth grid 4, a fifth grid 5, a middle grid 6 and a top grid 7; the grid sheet 1 of the bottom layer, the grid sheet 2 of the second layer, the grid sheet 3 of the third layer, the grid sheet 4 of the fourth layer, the grid sheet 5 of the fifth layer, several middle level grid sheets 6, and the grid sheet 7 of the top layer are laminated according to the identical interval, the interval of layer and number of layers are usually confirmed according to rated voltage and rated current grade, the interval of layer of this embodiment is 4.5mm, the number of layers is 41, meet 1.5kV, 1.2kA rated grade operation requirement.
Specifically, two groups of same grid pieces are symmetrically arranged between every two same layers; all the grid plates can be made of low-carbon steel plates, and other materials such as stainless steel and the like can be adopted under the condition of ensuring higher melting point and thermal conductivity.
As shown in fig. 2, the first six layers of grid sheets are formed by cutting V-shaped notches with different depths into rectangles, and the depth H of the V-shaped notches is reduced in sequence according to a bottom layer grid sheet 1, a second layer grid sheet 2, a third layer grid sheet 3, a fourth layer grid sheet 4, a fifth layer grid sheet 5 and a middle layer grid sheet 6.
As shown in fig. 1a and 1b, the structure formed by laminating the first six layers of grid sheets forms an inverted horn-shaped airflow channel in front of the contact, which is very beneficial for electric arcs to smoothly enter the arc extinguishing grid, reduces the arcing time and prolongs the electrical service life of the contact;
as shown in fig. 1a and 1b, the middle-layer grid plates 6 have the same depth in a V shape, a V-shaped columnar airflow channel is formed after the multiple layers are stacked, and after electric arcs enter, the electric arcs are cut into small short arcs by each layer, so that the grid plates are cooled and extinguished; the number of superimposed layers of the middle-layer grid pieces 6 is positively correlated with the rated breaking current capacity.
As shown in fig. 1a and 1b, the thickness of the bottom layer grid sheet 1 is greater than that of the rest grid sheets, and the thickness of the rest grid sheets can be the same to ensure manufacturability under the condition of meeting normal use; because the bottom grid sheet 1 is closest to the contact, the arc column temperature is high, and the thickened bottom grid sheet 1 structure effectively improves the arc burning resistance and prolongs the service life of the arc extinguishing grid; in this embodiment, the thickness of the bottom grid plate 1 is 4mm, and the thicknesses of the rest grid plates are 2.5 mm.
As shown in fig. 3, the depth of the V-shaped gap of the top grid 7 is the same as that of the middle grid 6, the middle is connected in a strip shape to form a symmetrical integral structure on two sides, and a closed channel is formed at the top end of the arc-extinguishing grid.
In conclusion, the embodiment of the invention ensures that under the condition of the same rated breaking capacity, the capability of high-temperature electric arc entering the arc-extinguishing grid is improved to the maximum extent, the arcing time is reduced, the electric loss of the contact is reduced, and meanwhile, the arc burning resistance capability is effectively improved by the thickened bottom grid plate structure, so that the service lives of the contact and the arc-extinguishing grid are prolonged, and the use cost is reduced.
The arc-extinguishing grid structure, a rapid circuit breaker for rolling stock, forms the inverted horn-shaped airflow channel in front of the contact, is beneficial to smooth entering of electric arc into the arc-extinguishing grid and reduction of arcing time, and simultaneously, the thickened bottom grid sheet structure improves the electric arc burning loss resistance, the service life of the contact and the arc-extinguishing grid is effectively prolonged, and the use cost is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (5)
1. An arc-extinguishing grid structure is characterized by comprising a bottom grid sheet (1), two layers of grid sheets (2), three layers of grid sheets (3), four layers of grid sheets (4), five layers of grid sheets (5), a plurality of middle layer grid sheets (6) and a top layer grid sheet (7);
the bottom grid sheet (1), the second grid sheet (2), the third grid sheet (3), the fourth grid sheet (4), the fifth grid sheet (5), the middle grid sheets (6) and the top grid sheet (7) are arranged in a stacked mode according to the same interval;
the grid structure is characterized in that the bottom grid sheet (1), the two layers of grid sheets (2), the three layers of grid sheets (3), the four layers of grid sheets (4), the five layers of grid sheets (5) and the plurality of middle layer grid sheets (6) are symmetrically arranged by two groups of same grid sheets, and the top layer grid sheet (7) is of an integral structure.
2. The arc extinguishing grid structure according to claim 1, characterized in that the shapes of the bottom grid sheet (1), the two-layer grid sheets (2), the three-layer grid sheet (3), the four-layer grid sheet (4), the five-layer grid sheet (5) and the middle grid sheets (6) are all formed by cutting V-shaped gaps with different depths into rectangles;
the top grid sheet (7) is a V-shaped notch cut by a rectangle, and the middle of the top grid sheet is connected by a strip to form a bilaterally symmetrical integral structure.
3. An arc extinguishing grid structure according to claim 2, characterized in that the V-shaped gap depth H is reduced sequentially from the bottom grid (1), the two-layer grid (2), the three-layer grid (3), the four-layer grid (4), the five-layer grid (5) to the middle grid (6);
the depth H of the V-shaped gap of the top grid sheet (7) is the same as the depth H of the V-shaped gap of the middle grid sheet (6).
4. An arc chute structure according to claim 1, characterized in that the thickness of the bottom grid (1) is greater than the remaining grids, the remaining grids being of the same thickness.
5. The arc chute structure according to any one of claims 1 to 4, wherein the grid pieces are made of mild steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554780.0A CN114360979A (en) | 2021-12-17 | 2021-12-17 | Arc extinguishing grid structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554780.0A CN114360979A (en) | 2021-12-17 | 2021-12-17 | Arc extinguishing grid structure |
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| Publication Number | Publication Date |
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| CN114360979A true CN114360979A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111554780.0A Pending CN114360979A (en) | 2021-12-17 | 2021-12-17 | Arc extinguishing grid structure |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890002928A (en) * | 1987-07-13 | 1989-04-11 | 시키 모리야 | Circuit breaker |
| CN201072714Y (en) * | 2007-07-06 | 2008-06-11 | 施耐德电器工业公司 | Arc extinguishing grid device |
| CN201229868Y (en) * | 2008-07-16 | 2009-04-29 | 乐星产电(无锡)有限公司 | Arc-extinguishing chamber for circuit breaker |
| CN102368451A (en) * | 2011-10-28 | 2012-03-07 | 法泰电器（江苏）股份有限公司 | Arc extinguish chamber device for circuit breaker |
| CN103069523A (en) * | 2010-06-07 | 2013-04-24 | 伊顿电气Ip两合公司 | Switch unit with arc-extinguishing units |
| CN103403827A (en) * | 2010-12-07 | 2013-11-20 | 伊顿电气Ip两合公司 | Switch with arcing chamber |
| CN103985577A (en) * | 2014-05-23 | 2014-08-13 | 国家电网公司 | Portable power switchgear |
| EP2856481A1 (en) * | 2012-05-30 | 2015-04-08 | Abb Ab | A switching device |
| WO2017059912A1 (en) * | 2015-10-08 | 2017-04-13 | Abb Schweiz Ag | An arc extinguishing chamber for a switching device |
| CN109285704A (en) * | 2018-10-16 | 2019-01-29 | 浙江正泰电器股份有限公司 | The arc extinguishing structure of double break contact |
| WO2020241397A1 (en) * | 2019-05-28 | 2020-12-03 | 三菱電機株式会社 | Direct-current circuit breaker |
-
2021
- 2021-12-17 CN CN202111554780.0A patent/CN114360979A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890002928A (en) * | 1987-07-13 | 1989-04-11 | 시키 모리야 | Circuit breaker |
| CN201072714Y (en) * | 2007-07-06 | 2008-06-11 | 施耐德电器工业公司 | Arc extinguishing grid device |
| CN201229868Y (en) * | 2008-07-16 | 2009-04-29 | 乐星产电(无锡)有限公司 | Arc-extinguishing chamber for circuit breaker |
| CN103069523A (en) * | 2010-06-07 | 2013-04-24 | 伊顿电气Ip两合公司 | Switch unit with arc-extinguishing units |
| CN103403827A (en) * | 2010-12-07 | 2013-11-20 | 伊顿电气Ip两合公司 | Switch with arcing chamber |
| CN102368451A (en) * | 2011-10-28 | 2012-03-07 | 法泰电器（江苏）股份有限公司 | Arc extinguish chamber device for circuit breaker |
| EP2856481A1 (en) * | 2012-05-30 | 2015-04-08 | Abb Ab | A switching device |
| CN103985577A (en) * | 2014-05-23 | 2014-08-13 | 国家电网公司 | Portable power switchgear |
| WO2017059912A1 (en) * | 2015-10-08 | 2017-04-13 | Abb Schweiz Ag | An arc extinguishing chamber for a switching device |
| CN109285704A (en) * | 2018-10-16 | 2019-01-29 | 浙江正泰电器股份有限公司 | The arc extinguishing structure of double break contact |
| WO2020241397A1 (en) * | 2019-05-28 | 2020-12-03 | 三菱電機株式会社 | Direct-current circuit breaker |
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