CN220963130U - Double-arc-extinguishing-chamber direct-current molded case circuit breaker - Google Patents
Double-arc-extinguishing-chamber direct-current molded case circuit breaker Download PDFInfo
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- CN220963130U CN220963130U CN202322556325.5U CN202322556325U CN220963130U CN 220963130 U CN220963130 U CN 220963130U CN 202322556325 U CN202322556325 U CN 202322556325U CN 220963130 U CN220963130 U CN 220963130U
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- extinguishing
- arc extinguishing
- lamination
- piece
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- 230000003068 static effect Effects 0.000 claims abstract description 7
- 238000003475 lamination Methods 0.000 claims description 37
- 238000004804 winding Methods 0.000 claims description 6
- 230000009191 jumping Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010891 electric arc Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 7
- 230000008033 biological extinction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a direct-current plastic-case circuit breaker with double arc extinguishing chambers, which is provided with a case; two groups of fixed contacts, two groups of moving contacts, an operating mechanism for controlling the brake contacts and the fixed contacts to switch on and off and a release are arranged in the shell; two arc extinguishing devices are arranged in the shell; each group of static contact and moving contact opening and closing positions are correspondingly provided with an arc extinguishing device; the first arc-extinguishing chamber and the second arc-extinguishing chamber of the arc-extinguishing device; a first air channel communicated with the outside is arranged on one side of the first arc-extinguishing chamber away from the operating mechanism, and a second air channel communicated with the outside is arranged on one side of the second arc-extinguishing chamber away from the operating mechanism; the shell is provided with a through groove; the wiring end of the fixed contact is positioned in the through groove; the air outlets of the first air channel and the second air channel are both positioned in the range of the through groove. The utility model has outstanding arc extinguishing effect, and can achieve zero arcing distance when being opened, namely no arc is sprayed out of the shell. And meanwhile, the air medium flow formed by utilizing the temperature difference is beneficial to promoting the electric arc to enter the arc extinguishing chamber.
Description
Technical Field
The utility model relates to the field of circuit breakers, in particular to a direct current plastic shell circuit breaker with double arc extinguishing chambers.
Background
The traditional direct current breaker is low in voltage, so that the problem of single-pole full-voltage switching-on and switching-off cannot be solved, and the new energy application scene cannot be met. In the high-voltage plastic-housing circuit breaker, due to the limitation of the internal space, a single arc extinguishing chamber is often adopted, and the lamination number and the height of the arc extinguishing grid sheet group in the arc extinguishing chamber are also limited, so that the arc voltage drop is difficult to improve, and the breaking capacity of the existing arc extinguishing chamber is limited under the high-voltage level.
Meanwhile, in the existing arc extinguishing scheme, in order to improve the arc extinguishing capability, the efficiency of the arc entering the arc extinguishing grid sheet set can be improved by adopting a magnetic blowing mode. The magnetic quenching is a method for achieving quenching by utilizing the acting force of a magnetic field on current, and is called magnetic quenching. When a large electrodynamic force is required to blow an arc into the arc chute, a strong enough magnetic field needs to be established with a special magnetic blow-off coil. It typically has one to several turns connected in series with the contacts (although it may also be connected in parallel with the power supply, it is rare). In order to make the magnetic field more intensively distributed in the arc area to increase the arc blowing force, the center of the coil is penetrated with an iron core, and the two ends of the coil are parallel to the magnetic steel plates which clamp the arc extinguishing chamber. The arc blowing effect of the series magnetic blow-out coil is obvious when the contact breaks large current, and is worse when breaking small current. However, the implementation of magnetic blowout requires the provision of a magnetic blowout coil, thereby increasing the circuit breaker volume.
Disclosure of utility model
The utility model aims to provide a direct-current plastic shell circuit breaker with double arc-extinguishing chambers, which has outstanding arc-extinguishing effect and can achieve zero arcing distance when being disconnected, namely, no arc is sprayed out of a shell. And meanwhile, the air medium flow formed by utilizing the temperature difference is beneficial to promoting the electric arc to enter the arc extinguishing chamber.
The technical scheme for realizing the aim of the utility model is as follows: the utility model has a housing; two groups of fixed contacts, two groups of moving contacts, an operating mechanism for controlling the brake contacts and the fixed contacts to switch on and off and a release are arranged in the shell; two arc extinguishing devices are arranged in the shell; each group of static contact and moving contact opening and closing positions are correspondingly provided with an arc extinguishing device; the arc extinguishing device comprises an arc extinguishing box body, a first arc extinguishing grid sheet group, a second arc extinguishing grid sheet group, a series arc guide sheet, a first arc striking sheet and a second arc striking sheet; an insulating part is arranged in the arc extinguishing box body; one end of the insulating piece is connected with the upper part of the arc extinguishing box body into a whole, the other end of the insulating piece is an extending end, and the extending end extends downwards from the upper part of the arc extinguishing box body and towards the direction of the operating mechanism; the series connection arc guide piece is coated on the extending end of the insulating piece; the upper end and the lower end of the arc extinguishing box body are respectively fixedly provided with a first arc striking sheet and a second arc striking sheet; a first arc extinguishing chamber is formed between the first arc striking piece and the insulating piece, and a second arc extinguishing chamber is formed between the insulating piece and the second arc striking piece; the first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group are respectively and fixedly arranged in the first arc-extinguishing chamber and the second arc-extinguishing chamber; the first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group comprise a plurality of grid sheets which are stacked and are equidistantly spaced; one end of the first arc striking piece and one end of the first arc extinguishing grid piece group form interval lamination, and the other end of the first arc striking piece corresponds to the opening position of the movable contact; the other end of the first arc extinguishing grid sheet group and one end of the serial arc guide sheet form a spaced lamination; the other end of the serial arc guide sheet and one end of the second arc extinguishing grid sheet group form interval lamination, the other end of the second arc extinguishing grid sheet group and one end of the second arc striking sheet form interval lamination, and the other end of the second arc striking sheet is fixedly connected with the static contact;
A first air channel communicated with the outside is arranged on one side of the first arc-extinguishing chamber away from the operating mechanism, and a second air channel communicated with the outside is arranged on one side of the second arc-extinguishing chamber away from the operating mechanism; the shell is provided with a through groove; the wiring end of the fixed contact is positioned in the through groove; the air outlets of the first air channel and the second air channel are both positioned in the range of the through groove.
Further, the series arc guide sheet sequentially comprises a first lamination part, an extension part, a winding part and a second lamination part along the extension direction; the first lamination part and one end of the second arc extinguishing grid sheet group form interval lamination, the extension part is attached to the insulating piece along the lower surface of the insulating piece, and the winding part extends from the extension end of the insulating piece to the upper surface of the insulating piece; the second lamination part is attached to the upper surface of the insulating member and forms a spaced lamination with the other end of the first arc extinguishing grid sheet group.
Further, the arc extinguishing box body comprises an upper top plate, a first side plate, a second side plate and a back plate; one end of the insulating piece is connected with the upper part of the backboard into a whole; a first air channel is formed between the insulating piece and the upper top plate, and an air outlet of the first air channel is arranged between the insulating piece and the upper top plate on the back plate; the backboard is provided with an air outlet of the second air duct below the insulating piece.
Further, dustproof net plates are arranged on the air outlet of the first air channel and the air outlet of the second air channel.
Further, the first striking plate comprises a lamination part, a connection part and a potential jump part which are sequentially connected into a whole; the lamination part and one end of the first arc extinguishing grid sheet group form interval lamination; the potential jumping part corresponds to the opening position of the movable contact, and in the opening state, a gap is formed between the movable contact and the potential jumping part.
Further, positioning grooves corresponding to the lower ends of the first side plate and the second side plate are formed in the second striking plate; the lower ends of the first side plate and the second side plate are inserted into the positioning grooves to form positioning fit.
The utility model has the positive effects that: (1) According to the utility model, the number of the grid plates is increased by arranging the first arc-extinguishing grid plate group and the second arc-extinguishing grid plate group, so that the arc voltage drop is effectively improved, and the arc-extinguishing effect is greatly improved. Meanwhile, the first arc extinguishing grid sheet group is closer to the moving contact, so that the arc blowing magnetic field and the arc suction electric power are enhanced.
(2) According to the utility model, the first air duct and the second air duct are arranged, and the temperature difference is formed by utilizing the high temperature of the arc, so that the self-flowing of an air medium is formed, the automatic arc blowing is formed, the efficiency of the arc entering the arc extinguishing device is further improved, the arc extinguishing chamber can be fully utilized when the arc extinguishing device is opened and closed, and the arc striking distance is zero.
(3) According to the utility model, the arc guide plates are connected in series, so that the first arc-extinguishing grid plate group and the second arc-extinguishing grid plate group can form arc-extinguishing linkage, and the first arc-extinguishing grid plate group and the second arc-extinguishing grid plate group can participate in arc extinction no matter where an arc is generated, so that the arc extinction efficiency is further improved.
(4) The dustproof screen plate can play roles in dust prevention and electricity prevention.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the internal structure of the present utility model;
fig. 3 is a schematic diagram of the cooperation of the arc extinguishing device with the moving contact and the static contact in the utility model;
FIG. 4 is a schematic diagram of a serial connection of arc guide plates according to the present utility model;
fig. 5 is a schematic structural view of an arc extinguishing device according to the present utility model;
FIG. 6 is a schematic diagram of a serial arc guide plate according to the present utility model;
FIG. 7 is a schematic view of the structure of a first striking plate according to the present utility model;
fig. 8 is a schematic structural view of a second striking plate according to the present utility model.
Detailed Description
Referring to fig. 1 to 8, the present utility model has a housing 1; two groups of fixed contacts 2, two groups of moving contacts 3, an operating mechanism 4 for controlling the moving contacts 3 and the fixed contacts 2 to switch on and off, and a release 5 are arranged in the shell; the operating mechanism 4 and the release 5 are of the existing structure, and are not described in detail herein; two arc extinguishing devices 6 are also arranged in the shell 1; each group of static contact 2 and moving contact 3 are correspondingly provided with an arc extinguishing device 6 at the opening and closing position; the arc extinguishing device 6 comprises an arc extinguishing box body 61, a first arc extinguishing grid sheet group 62, a second arc extinguishing grid sheet group 63, a series connection arc guide sheet 64, a first arc striking sheet 65 and a second arc striking sheet 66; an insulating member 611 is arranged in the arc extinguishing box body 61; one end of the insulating member 611 is integrally connected with the upper portion of the arc extinguishing box body 61, the other end of the insulating member 611 is an extending end 611-1, and the extending end 611-1 extends downwards from the upper portion in the arc extinguishing box body 61 and towards the operating mechanism 4; the series arc guide plate 64 is coated on the extending end 611-1 of the insulating member 611; the upper end and the lower end of the arc extinguishing box body 61 are respectively fixedly provided with a first arc striking sheet 65 and a second arc striking sheet 66; a first arc extinguishing chamber is formed between the first striking plate 65 and the insulating member 611, and a second arc extinguishing chamber is formed between the insulating member 611 and the second striking plate 66; the first arc-extinguishing gate sheet group 62 and the second arc-extinguishing gate sheet group 63 are fixedly arranged in the first arc-extinguishing chamber and the second arc-extinguishing chamber respectively; the first arc extinguishing grid sheet group 62 and the second arc extinguishing grid sheet group 63 each comprise a plurality of grid sheets which are stacked and equidistantly spaced; by arranging the first arc extinguishing gate sheet group 62 and the second arc extinguishing gate sheet group 63, the number of gate sheets is increased, so that the arc voltage drop is effectively improved, and the arc extinguishing effect is greatly improved. Wherein the first arc extinguishing chamber is closer to the operating mechanism 4 and is located at the upper half of the second arc extinguishing chamber; meanwhile, the first arc extinguishing grid plate group 65 is closer to the moving contact 3, so that the arc blowing magnetic field and the arc sucking electric power are enhanced.
One end of the first striking plate 65 and one end of the first arc extinguishing gate plate group 62 are stacked at intervals, and the other end of the first striking plate 65 corresponds to the opening position of the movable contact 3; the other end of the first arc extinguishing gate sheet group 62 and one end of the serial arc guiding sheet 64 form a spaced lamination; the other end of the series arc guide sheet 64 and one end of the second arc extinguishing grid sheet group 63 form interval lamination, the other end of the second arc extinguishing grid sheet group 63 and one end of the second arc striking sheet 66 form interval lamination, and the other end of the second arc striking sheet 66 is fixedly connected with the fixed contact 2;
A first air duct 67 communicated with the outside is arranged on one side of the first arc-extinguishing chamber away from the operating mechanism 4, and a second air duct 68 communicated with the outside is arranged on one side of the second arc-extinguishing chamber away from the operating mechanism 4; the shell 1 is provided with a through groove 11; the wiring end 21 of the fixed contact 2 is positioned in the through groove 11; the air outlets of the first air duct 67 and the second air duct 68 are located within the range of the through groove 11. Through setting up first wind channel 67 and second wind channel 68, utilize the arc high temperature to form the difference in temperature to form the self-running of air medium, thereby form automatic arc blowing, further improve the efficiency that the electric arc got into arc extinguishing device, can make the explosion chamber by abundant utilization when breaking, accomplish the flashover distance and be zero.
The series arc guide piece 64 includes a first lamination portion 641, an extension portion 642, a winding portion 643, and a second lamination portion 644 in this order along the extension direction thereof; the first lamination portion 641 and one end of the second arc extinguishing gate sheet group 63 are laminated with each other at an interval, the extension portion 642 is bonded to the insulator 611 along the lower surface of the insulator 611, and the winding portion 643 extends from the extension end 611-1 of the insulator 611 to the upper surface of the insulator 611; the second lamination portion 644 is bonded to the upper surface of the insulating member 611 and is laminated with the other end of the first arc extinguishing gate sheet group 62 with a gap therebetween. By connecting the arc guide plates 64 in series, the first arc-extinguishing gate plate group 62 and the second arc-extinguishing gate plate group 63 can form arc-extinguishing linkage, and the first arc-extinguishing gate plate group 62 and the second arc-extinguishing gate plate group 63 can participate in arc extinction no matter where the arc is generated, so that the arc extinction efficiency is further improved, and fig. 4 can be seen.
The arc extinguishing box body 61 comprises an upper top plate 612, a first side plate 613, a second side plate 614 and a back plate 615; one end of the insulating member 611 is integrally connected to the upper portion of the back plate 615; a first air duct 67 is formed between the insulating member 611 and the upper top plate 612, and an air outlet of the first air duct 67 is arranged between the insulating member 611 and the upper top plate 612 on the back plate 615; the back plate 615 is provided with an air outlet of the second air duct 68 below the insulating member 611.
The air outlet of the first air duct 67 and the air outlet of the second air duct 68 are respectively provided with a dustproof screen 7.
The first striking plate 65 includes a lamination portion 651, a connection portion 652, and a potential jump portion 653 that are sequentially connected into one body; the lamination portion 651 forms a spaced lamination with one end of the first arc extinguishing gate sheet group 62; the potential jump 653 corresponds to the open position of the moving contact 3, and in the open state, a gap is formed between the moving contact 3 and the potential jump 653.
Positioning grooves 661 corresponding to the lower ends of the first side plate 613 and the second side plate 614 are formed in the second striking plate 66; the lower ends of the first side plate 613 and the second side plate 614 are inserted into the positioning groove 661 to form a positioning fit. The second striking plate 66 is provided with a connection hole 662 for forming fixed electrical connection with the fixed contact 2 through a screw.
While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.
Claims (6)
1. A direct current molded case circuit breaker with double arc extinguishing chambers comprises a shell; two groups of fixed contacts, two groups of moving contacts, an operating mechanism for controlling the brake contacts and the fixed contacts to switch on and off and a release are arranged in the shell; two arc extinguishing devices are arranged in the shell; each group of static contact and moving contact opening and closing positions are correspondingly provided with an arc extinguishing device; the method is characterized in that: the arc extinguishing device comprises an arc extinguishing box body, a first arc extinguishing grid sheet group, a second arc extinguishing grid sheet group, a series arc guide sheet, a first arc striking sheet and a second arc striking sheet; an insulating part is arranged in the arc extinguishing box body; one end of the insulating piece is connected with the upper part of the arc extinguishing box body into a whole, the other end of the insulating piece is an extending end, and the extending end extends downwards from the upper part of the arc extinguishing box body and towards the direction of the operating mechanism; the series connection arc guide piece is coated on the extending end of the insulating piece; the upper end and the lower end of the arc extinguishing box body are respectively fixedly provided with a first arc striking sheet and a second arc striking sheet; a first arc extinguishing chamber is formed between the first arc striking piece and the insulating piece, and a second arc extinguishing chamber is formed between the insulating piece and the second arc striking piece; the first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group are respectively and fixedly arranged in the first arc-extinguishing chamber and the second arc-extinguishing chamber; the first arc-extinguishing grid sheet group and the second arc-extinguishing grid sheet group comprise a plurality of grid sheets which are stacked and are equidistantly spaced; one end of the first arc striking piece and one end of the first arc extinguishing grid piece group form interval lamination, and the other end of the first arc striking piece corresponds to the opening position of the movable contact; the other end of the first arc extinguishing grid sheet group and one end of the serial arc guide sheet form a spaced lamination; the other end of the serial arc guide sheet and one end of the second arc extinguishing grid sheet group form interval lamination, the other end of the second arc extinguishing grid sheet group and one end of the second arc striking sheet form interval lamination, and the other end of the second arc striking sheet is fixedly connected with the static contact;
A first air channel communicated with the outside is arranged on one side of the first arc-extinguishing chamber away from the operating mechanism, and a second air channel communicated with the outside is arranged on one side of the second arc-extinguishing chamber away from the operating mechanism; the shell is provided with a through groove; the wiring end of the fixed contact is positioned in the through groove; the air outlets of the first air channel and the second air channel are both positioned in the range of the through groove.
2. The dual arc chute direct current molded case circuit breaker according to claim 1, wherein: the series connection arc guide sheet sequentially comprises a first lamination part, an extension part, a winding part and a second lamination part along the extension direction of the series connection arc guide sheet; the first lamination part and one end of the second arc extinguishing grid sheet group form interval lamination, the extension part is attached to the insulating piece along the lower surface of the insulating piece, and the winding part extends from the extension end of the insulating piece to the upper surface of the insulating piece; the second lamination part is attached to the upper surface of the insulating member and forms a spaced lamination with the other end of the first arc extinguishing grid sheet group.
3. A double arc chute dc molded case circuit breaker according to claim 1 or 2, characterized in that: the arc extinguishing box body comprises an upper top plate, a first side plate, a second side plate and a back plate; one end of the insulating piece is connected with the upper part of the backboard into a whole; a first air channel is formed between the insulating piece and the upper top plate, and an air outlet of the first air channel is arranged between the insulating piece and the upper top plate on the back plate; the backboard is provided with an air outlet of the second air duct below the insulating piece.
4. A dual arc chute dc molded case circuit breaker according to claim 3, wherein: and dustproof net plates are arranged on the air outlet of the first air channel and the air outlet of the second air channel.
5. The double arc chute direct current molded case circuit breaker according to claim 4, wherein: the first arc striking piece comprises a lamination part, a connecting part and a potential jump part which are sequentially connected into a whole; the lamination part and one end of the first arc extinguishing grid sheet group form interval lamination; the potential jumping part corresponds to the opening position of the movable contact, and in the opening state, a gap is formed between the movable contact and the potential jumping part.
6. The double arc chute direct current molded case circuit breaker according to claim 4, wherein: positioning grooves corresponding to the lower ends of the first side plate and the second side plate are formed in the second arc striking piece; the lower ends of the first side plate and the second side plate are inserted into the positioning grooves to form positioning fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322556325.5U CN220963130U (en) | 2023-09-20 | 2023-09-20 | Double-arc-extinguishing-chamber direct-current molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322556325.5U CN220963130U (en) | 2023-09-20 | 2023-09-20 | Double-arc-extinguishing-chamber direct-current molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220963130U true CN220963130U (en) | 2024-05-14 |
Family
ID=91016409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322556325.5U Active CN220963130U (en) | 2023-09-20 | 2023-09-20 | Double-arc-extinguishing-chamber direct-current molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220963130U (en) |
-
2023
- 2023-09-20 CN CN202322556325.5U patent/CN220963130U/en active Active
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