CN219658574U - Arc extinguishing system applied to low-voltage switch and low-voltage switch - Google Patents
Arc extinguishing system applied to low-voltage switch and low-voltage switch Download PDFInfo
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- CN219658574U CN219658574U CN202320601753.2U CN202320601753U CN219658574U CN 219658574 U CN219658574 U CN 219658574U CN 202320601753 U CN202320601753 U CN 202320601753U CN 219658574 U CN219658574 U CN 219658574U
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- contact
- permanent magnet
- arc
- arc extinguishing
- housing
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- 238000010891 electric arc Methods 0.000 claims abstract description 6
- 239000012212 insulator Substances 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000002679 ablation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses an arc extinguishing system applied to a low-voltage switch, which comprises: a housing; a stationary contact fixed to the housing; a movable contact movable relative to the housing to selectively contact and separate from the stationary contact; the longitudinal slits are arranged near the closing positions of the fixed contact and the movable contact at intervals and extend outwards; the permanent magnet assembly is arranged outside the closing position of the fixed contact and the moving contact and comprises a permanent magnet supporting piece and a permanent magnet arranged in the permanent magnet supporting piece, and the permanent magnet is arranged to pull the electric arc generated when the moving contact and the fixed contact are closed and opened outwards. The arc extinguishing system provided by the utility model consists of the permanent magnet assembly and a plurality of longitudinal joints, replaces a common metal grid arc extinguishing system of a low-voltage switch, utilizes the permanent magnet to pull an arc generated by switching on and off of the switch to the longitudinal joints, plays a role in lengthening and cooling the arc, shortens the arcing time, achieves the arc extinguishing effect, prevents stop and arc ablation of a fixed contact, has high arc extinguishing efficiency, and improves the breaking capacity of the low-voltage switch.
Description
Technical Field
The present utility model relates to an arc extinguishing system applied to a low voltage switch and a low voltage switch including the same.
Background
At present, for a low-voltage switch, an arc is generated when a switch contact is closed and opened, and for a long time, rapid and effective arc extinction is an important point in the technical field of the low-voltage switch. The common metal grid arc extinguishing system of the low-voltage switch has an unsatisfactory arc extinguishing effect along with the rise of voltage.
Disclosure of Invention
In view of the above problems, according to a first aspect of the present utility model, there is provided an arc extinguishing system applied to a low voltage switch, comprising: a housing including a first housing and a second housing mounted to each other; a stationary contact fixed to the housing; a movable contact movable relative to the housing to selectively contact and separate from the stationary contact; the longitudinal slits are arranged near the closing positions of the fixed contact and the movable contact at intervals and extend outwards; the permanent magnet assembly is fixedly arranged between the longitudinal slits of the first shell and the longitudinal slits of the second shell, is arranged outside the closing positions of the fixed contact and the moving contact, comprises a permanent magnet supporting piece and a permanent magnet arranged in the permanent magnet supporting piece, and is used for pulling the electric arcs generated when the moving contact and the fixed contact are closed and opened outwards.
The arc extinguishing system provided by the utility model consists of the permanent magnet assembly and a plurality of longitudinal slits, replaces the common metal grid arc extinguishing system of the low-voltage switch, utilizes the permanent magnet to pull the arc generated when the switch is closed and opened into the longitudinal slits, plays a role in lengthening and cooling the arc, shortens the arcing time, achieves the arc extinguishing effect, prevents stop and arc ablation of a fixed contact, has high arc extinguishing efficiency, and improves the breaking capacity of the low-voltage switch.
The arc extinguishing system according to the present utility model may have one or more of the following features.
According to one embodiment, the plurality of longitudinal slits are integrally formed with the housing. The longitudinal seams and the shell are integrally formed, so that the manufacturing and assembling processes can be simplified, the space in the shell is fully utilized, and the cost is reduced.
According to one embodiment, the plurality of longitudinal slits are comprised of an insulator. The longitudinal seams of the insulating material do not affect the magnetic field distribution generated by the permanent magnets.
According to one embodiment, the plurality of longitudinal slits are distributed from the closed position to the maximum open position of the fixed contact and the movable contact. So that the arc extinguishing effect can be improved.
According to one embodiment, the plurality of longitudinal slits extend in length outwardly from the closed position of the stationary and moving contacts to an edge of the housing. The arc extinguishing passage extends in length to the edge of the case to improve the arc extinguishing effect.
According to one embodiment, the permanent magnet is arranged as an N pole or an S pole close to the moving contact and the fixed contact side. The magnetic poles of the permanent magnet are arranged to facilitate the traction of the electromagnetic force to the electric arc.
According to one embodiment, the permanent magnet is shaped such that the side close to the moving contact and the fixed contact is arc-shaped, and a part far away from the moving contact and the fixed contact is arc-shaped, and the other part is linear. Therefore, the permanent magnet can be set larger, and the requirement on electromagnetic force traction arc is met.
According to one embodiment, the housing comprises a first housing and a second housing that are identical in structure and symmetrical to each other. The symmetrical first and second housings facilitate manufacturing and installation.
According to one embodiment, the arc extinguishing channel is provided with a recess arranged to receive the permanent magnet support and a positioning hole arranged to receive a positioning protrusion arranged on the permanent magnet support. The arrangement of the grooves provides a space for accommodating the permanent magnet assembly, and the permanent magnet support is positioned by the cooperation of the positioning holes and the positioning protrusions.
According to one embodiment, the stationary contact comprises a first stationary contact and a second stationary contact, the movable contact comprises a first movable contact and a second movable contact, the arc extinguishing system comprises a movable contact support pivotably arranged in the housing, the first movable contact and the second movable contact are arranged on the movable contact support, the first movable contact and the second movable contact can pivot together with the movable contact support, the plurality of longitudinal slits comprise a first plurality of longitudinal slits arranged near the closed position of the first stationary contact and the first movable contact and a second plurality of longitudinal slits arranged near the closed position of the second stationary contact and the second movable contact, the permanent magnet assembly comprises a first permanent magnet assembly arranged outside the closed position of the first stationary contact and the first movable contact and a second permanent magnet assembly arranged outside the closed position of the second stationary contact, a first permanent magnet in the first permanent magnet is arranged to pull the first movable contact and the first movable contact together, and a second permanent magnet in the first permanent magnet assembly is arranged to pull the first permanent magnet assembly to pull the first movable contact and the second permanent magnet assembly to pull the second permanent magnet assembly out the first movable contact and the second movable contact together when the first stationary contact is separated. The arc extinguishing design can be carried out on the electric arc between the two pairs of fixed contacts and the moving contact of the arc extinguishing system.
According to one embodiment, the first fixed contact and the second fixed contact are rotationally symmetrical about a rotation center of the moving contact support, and the first moving contact and the second moving contact are radially on a straight line with respect to the rotation center of the moving contact support.
According to one embodiment, the housing comprises a first housing and a second housing that are identical in structure and symmetrical to each other. The symmetrical first and second housings facilitate manufacturing and installation.
According to a second aspect of the present utility model, a low voltage switch is provided, comprising the above-mentioned arc extinguishing system.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.
Fig. 1 is a general perspective view of an arc extinguishing system according to the present utility model.
Fig. 2 is a cross-sectional view of an arc extinguishing system according to the present utility model.
Fig. 3 is an internal structural view of the arc extinguishing system according to the present utility model.
Fig. 4 is a view of a housing of the arc extinguishing system according to the present utility model.
Fig. 5 is a partial schematic view of an arc chute of an arc extinguishing system according to the present utility model.
Fig. 6 is an exploded view of a permanent magnet assembly of the arc extinguishing system according to the present utility model.
Fig. 7 is a schematic view of poles of a permanent magnet of an arc extinguishing system according to the present utility model.
List of reference numerals
11. First shell body
12. Second shell
21. First stationary contact
22. Second stationary contact
31. First moving contact
32. Second moving contact
33. Moving contact support
40. Longitudinal seam
41. First arc extinguishing channel
411. Groove
412. Positioning hole
42. Second arc extinguishing channel
51. First permanent magnet assembly
511. First permanent magnet
512. First permanent magnet support
5121. Positioning protrusion
52. Second permanent magnet assembly
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The utility model is described in detail below by way of description of example embodiments.
Fig. 1 is a general perspective view of an arc extinguishing system according to the present utility model. Fig. 2 is a cross-sectional view of an arc extinguishing system according to the present utility model. Fig. 3 is an internal structural view of the arc extinguishing system according to the present utility model. Referring to fig. 1-2, an arc extinguishing system according to an embodiment of the present utility model for a low voltage switch includes a housing, and in particular, may include a first housing 11 and a second housing 12. The first and second housings 11 and 12 may be identical in structure and symmetrical to each other, and assembled to each other to form a housing that separates the components inside the arc extinguishing system from the external environment. Referring to fig. 3, the arc extinguishing system further includes a fixed contact fixed to the housing and a moving contact assembly movable with respect to the housing, the fixed contact may include a first fixed contact 21 and a second fixed contact 22, the moving contact assembly may include a moving contact bracket 33 pivotably disposed in the housing and a moving contact disposed on the moving contact bracket 33, the moving contact may include a first moving contact 31 and a second moving contact 32 radially aligned with respect to a rotation center of the moving contact bracket 33, and the first moving contact 31 and the second moving contact 32 may be pivoted together with the moving contact bracket 33 so as to be movable with respect to the housing to selectively contact and separate with the corresponding fixed contact, and the first fixed contact 21 and the second fixed contact 22 may be rotationally symmetrical with respect to the rotation center of the moving contact bracket 33.
With continued reference to fig. 3, the arc extinguishing system according to an embodiment of the present utility model may further include a plurality of longitudinal slits 40, the plurality of longitudinal slits 40 being fixed to the housing and spaced apart from each other, disposed near the closed positions of the stationary contact and the moving contact and extending outwardly, forming an arc extinguishing passage. The "outer" here is relative to the center of the housing, e.g., a first plurality of longitudinal slits 40 extending outwardly (upward and leftward in fig. 3) away from the closed position from the vicinity of the closed position of the first stationary contact 21 and the first movable contact 31, forming a first arc extinguishing passage 41; the second plurality of longitudinal slits 40 extend outwardly (downwardly and to the right in fig. 3) from the vicinity of the closed position of the second stationary contact 22 and the second movable contact 32 away from the closed position, forming a second arc extinguishing passage 42. Preferably, the plurality of longitudinal slits are distributed between the closed positions of the fixed contact and the movable contact to the maximum open position, and extend outward in length from the closed positions of the fixed contact and the movable contact to the edge of the shell, thereby facilitating the elongation and cooling of the arc. The plurality of longitudinal slits 40 are composed of an insulator. The plurality of longitudinal slits 40 may be integrally formed with the housing or may be fixedly assembled to the housing after being formed. The plurality of longitudinal slits 40 are integrally formed with the housing to simplify the manufacturing and assembly processes, make full use of the space within the housing of the arc extinguishing system, and reduce costs.
With continued reference to fig. 3, the arc extinguishing system according to an embodiment of the present utility model may further include a permanent magnet assembly disposed outside of the closed positions of the stationary and moving contacts. The permanent magnet assembly includes a permanent magnet support and a permanent magnet disposed within the permanent magnet support. For example, the first permanent magnet 511 and the first permanent magnet support 512 constitute a first permanent magnet assembly 51, and the second permanent magnet support constitute a second permanent magnet assembly 52. The permanent magnet assembly may be fixedly disposed between the plurality of longitudinal slits of the first housing and the plurality of longitudinal slits of the second housing. The permanent magnet is arranged to pull the arc generated when the moving contact and the fixed contact are closed and opened outwards. For arc pulling, the outside of the permanent magnet may be N-pole and the inside may be S-pole, as shown by the first permanent magnet 511 shown in fig. 7. Alternatively, the outer side of the permanent magnet may be an S-pole and the inner side may be an N-pole. The permanent magnet support is used for installing and positioning the permanent magnet on one hand and preventing the permanent magnet from being burnt by an arc generated by disconnection of the moving contact and the fixed contact on the other hand. Specifically, the permanent magnets include a first permanent magnet 511 disposed outside the closed position of the first stationary contact 21 and the first moving contact 31 and a second permanent magnet disposed outside the closed position of the second stationary contact 22 and the second moving contact 32, and the first permanent magnet 511 is disposed on the first arc extinguishing passage 41 and configured to draw the arc generated when the first moving contact 31 and the first stationary contact 21 are closed and opened outward. The second permanent magnet is disposed on the second arc extinguishing passage 42 and configured to draw the arc generated when the second moving contact 32 and the second stationary contact 22 are closed and opened outward.
Taking the first permanent magnet assembly 51 as an example, fig. 6 shows a separated view of the first permanent magnet 511 and the first permanent magnet support 512. The first permanent magnet support 512 is fixedly provided on the first arc extinguishing passage 41, thereby holding the first permanent magnet 511 on the first arc extinguishing passage 41. The shapes of the first permanent magnet 511 and the first permanent magnet support 512 may be set as follows: the inner side may be provided in an arc shape to adapt to a stroke shape in which the fixed contact and the moving contact are separated from each other, and the outer side may be provided in a corresponding arc shape. Alternatively, the inner side is provided in an arc shape, and the outer side is provided in a part in an arc shape, and the other part in a straight shape to accommodate the shape of the edge of the case, so that the first permanent magnet 511 can be provided to be large, satisfying the requirement of electromagnetic force of the arc, as shown in fig. 3 and 6.
In order to mount the permanent magnet assembly to the arc extinguishing passage formed by the plurality of longitudinal slits 40, the arc extinguishing passage is provided with a groove 411 and a positioning hole 412, the groove 411 being configured to receive the permanent magnet support, and the positioning hole 412 being configured to receive a positioning protrusion 5121 provided on the permanent magnet support. Taking the first permanent magnet assembly 51 as an example, as shown in fig. 4 and 5, the first arc extinguishing passage 41 formed by the first plurality of longitudinal slits 40 fixed to the first case 11 is provided with a recess 411 recessed downward to provide a space for accommodating the first permanent magnet support 512, and the first arc extinguishing passage 41 is also provided with, for example, two positioning holes 412. As shown in fig. 6, the first permanent magnet support 512 is provided with a positioning protrusion 5121. When the first permanent magnet support 512 is assembled into the recess 411, the positioning protrusions 5121 of the first permanent magnet support 512 are engaged with the corresponding positioning holes 412 to position the first permanent magnet support 512. Since the first housing 11 and the second housing 12 have the same structure, the first housing 11 and the second housing 12 are each provided with a plurality of longitudinal slits 40. In the case where the longitudinal slits 40 are integrally formed with the case, after the first case 11 and the second case 12 are assembled, the plurality of longitudinal slits 40 integrally formed with the first case 11 and the plurality of longitudinal slits 40 integrally formed with the second case 12 are aligned with each other, and the groove 411 provided on the first arc extinguishing passage 41 of the first case 11 is opposite to the groove 411 provided on the first arc extinguishing passage 41 of the second case 12 and constitutes a complete space accommodating the first permanent magnet assembly 51, so that the first permanent magnet assembly 51 may be disposed between the plurality of longitudinal slits 40 of the first case 11 and the plurality of longitudinal slits 40 of the second case 12.
According to the arc extinguishing system of the present utility model, in the opening process, the first moving contact 31 is separated from the first fixed contact 21, an arc is generated between the first moving contact 31 and the first fixed contact 21, the generated arc is a charged conductor, the first permanent magnet 511 generates a magnetic field, and the arc enters the first arc extinguishing passage 41 under the action of electromagnetic force. The first plurality of longitudinal slits 40 are made of insulating materials, so that the distribution of the magnetic field generated by the permanent magnet is not affected, and the electric arc is lengthened and cooled along the first plurality of longitudinal slits 40, so that an arc extinguishing effect is achieved. The second moving contact 32 is identical to the arc generated at the second stationary contact 22.
The arc extinguishing system applied to the low-voltage switch is composed of the permanent magnet assembly and the longitudinal slits, replaces a common metal grid piece arc extinguishing system of the low-voltage switch, utilizes the permanent magnet to pull an arc generated by switching on and off of the switch to the longitudinal slits, plays roles in elongating and cooling the arc, shortens the arcing time, achieves an arc extinguishing effect, prevents stop and static contact arc ablation, has high arc extinguishing efficiency and improves the breaking capacity of the low-voltage switch.
The exemplary implementation of the arc extinguishing system for low voltage switch according to the present utility model has been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that many variations and modifications may be made to the specific embodiments described above without departing from the scope of the present utility model, and many combinations of various technical features and structures may be made without departing from the scope of the present utility model.
Claims (12)
1. An arc extinguishing system for a low voltage switch, comprising:
a housing including a first housing and a second housing mounted to each other;
a stationary contact fixed to the housing;
a movable contact movable relative to the housing to selectively contact and separate from the stationary contact;
the longitudinal slits are arranged near the closing positions of the fixed contact and the movable contact at intervals and extend outwards;
the permanent magnet assembly is fixedly arranged between the longitudinal slits of the first shell and the longitudinal slits of the second shell, is arranged outside the closing positions of the fixed contact and the moving contact, comprises a permanent magnet supporting piece and a permanent magnet arranged in the permanent magnet supporting piece, and is used for pulling the electric arcs generated when the moving contact and the fixed contact are closed and opened outwards.
2. The arc suppression system for a low voltage switch of claim 1, wherein the plurality of longitudinal slits are integrally formed with the housing.
3. The arc suppression system for a low voltage switch of claim 1, wherein the plurality of longitudinal slits are comprised of an insulator.
4. An arc extinguishing system for low voltage switches according to any of claims 1-3 wherein the plurality of longitudinal slits are distributed from a closed position to a maximum open position of the stationary contact and the moving contact.
5. An arc extinguishing system for low voltage switches according to any of claims 1-3 wherein the plurality of longitudinal slits extend in length outwardly from the closed position of the stationary and moving contacts to the edge of the housing.
6. An arc extinguishing system applied to a low voltage switch according to any of claims 1-3, characterized in that the permanent magnet is arranged as N-pole or S-pole near the moving contact and the stationary contact side.
7. An arc extinguishing system for low voltage switches according to any of claims 1-3, wherein the permanent magnets are shaped such that the sides close to the moving contact and the stationary contact are arc-shaped, and a part of the sides far from the moving contact and the stationary contact are arc-shaped, and the other part is linear.
8. An arc extinguishing system for low voltage switches according to any of claims 1-3, characterized in that the housing comprises a first housing and a second housing which are identical in structure and symmetrical to each other.
9. An arc extinguishing system for a low voltage switch according to any of claims 1-3, characterized in that the plurality of longitudinal slits are provided with a recess arranged to receive the permanent magnet support and a positioning hole arranged to receive a positioning protrusion provided on the permanent magnet support.
10. An arc chute system for a low voltage switch as claimed in any one of claims 1-3, wherein,
the fixed contact comprises a first fixed contact and a second fixed contact,
the moving contact comprises a first moving contact and a second moving contact,
the arc extinguishing system comprises a movable contact support which is arranged in the shell in a pivotable way, the first movable contact and the second movable contact are arranged on the movable contact support, the first movable contact and the second movable contact can pivot together with the movable contact support,
the plurality of longitudinal slits includes a first plurality of longitudinal slits disposed proximate the closed position of the first stationary contact and the first movable contact and a second plurality of longitudinal slits disposed proximate the closed position of the second stationary contact and the second movable contact,
the permanent magnet assembly comprises a first permanent magnet assembly arranged outside the closing position of the first fixed contact and the first moving contact and a second permanent magnet assembly arranged outside the closing position of the second fixed contact and the second moving contact, wherein the first permanent magnet in the first permanent magnet assembly is used for outwards dragging an electric arc generated when the first moving contact and the first fixed contact are closed and opened, and the second permanent magnet in the second permanent magnet is used for outwards dragging the electric arc generated when the second moving contact and the second fixed contact are closed and opened.
11. The arc extinguishing system for low voltage switch according to claim 10, wherein the first stationary contact and the second stationary contact are rotationally symmetrical about a rotation center of a moving contact bracket, and the first moving contact and the second moving contact are radially aligned with respect to the rotation center of the moving contact bracket.
12. A low voltage switch comprising an arc suppression system according to any one of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320601753.2U CN219658574U (en) | 2023-03-24 | 2023-03-24 | Arc extinguishing system applied to low-voltage switch and low-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320601753.2U CN219658574U (en) | 2023-03-24 | 2023-03-24 | Arc extinguishing system applied to low-voltage switch and low-voltage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219658574U true CN219658574U (en) | 2023-09-08 |
Family
ID=87858539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320601753.2U Active CN219658574U (en) | 2023-03-24 | 2023-03-24 | Arc extinguishing system applied to low-voltage switch and low-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219658574U (en) |
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2023
- 2023-03-24 CN CN202320601753.2U patent/CN219658574U/en active Active
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