CN118471751A - Double-side-wall insulating grid sheet, nonpolar arc extinguishing structure and direct current breaker - Google Patents
Double-side-wall insulating grid sheet, nonpolar arc extinguishing structure and direct current breaker Download PDFInfo
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- CN118471751A CN118471751A CN202410589961.4A CN202410589961A CN118471751A CN 118471751 A CN118471751 A CN 118471751A CN 202410589961 A CN202410589961 A CN 202410589961A CN 118471751 A CN118471751 A CN 118471751A
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- insulated gate
- insulating grid
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- 238000000926 separation method Methods 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims description 38
- 230000003068 static effect Effects 0.000 claims description 17
- 230000009471 action Effects 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 abstract description 11
- 230000008033 biological extinction Effects 0.000 abstract description 9
- 238000010891 electric arc Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a double-side-wall insulating grid sheet, a nonpolar arc extinguishing structure and a direct current breaker, and belongs to the technical field of piezoelectric devices. The double-side-wall insulated gate sheet comprises a side-wall insulated gate sheet group, wherein the side-wall insulated gate sheet group consists of a plurality of insulated gate sheets, the insulated gate sheets are perpendicular to an arc separation wall in the direct current breaker, and the insulated gate sheets extend along the arc movement direction. The technical problems that the arc extinction of the insulating grid sheet of the direct current arc only depends on the magnetic field and airflow field action of the arc, the elongation and cooling action of the insulating grid sheet on the arc are limited, the external magnetic field has directivity, and the requirements of nonpolar direct current arc breaking cannot be met are solved.
Description
Technical Field
The invention belongs to the technical field of piezoelectric devices, and particularly relates to a double-side-wall insulating grid sheet, a nonpolar arc extinguishing structure and a direct current breaker.
Background
The prior art of low-voltage direct current circuit breaker is realized the arc extinction through promoting electric arc voltage restriction current zero crossing, and insulated gate piece arc extinction is a common mode, and after the electric arc got into the arc extinction region, it is blockked to receive the insulated gate piece, and the electric arc takes place to crookedly under the exogenic action to prolonged the electric arc, and strengthened the cooling, reached the purpose that promotes electric arc voltage and arc extinction. However, for the direct current arc, the arc extinction of the insulated gate sheet only depends on the magnetic field and airflow field of the arc, so that the elongation and cooling effects of the insulated gate sheet on the arc are greatly limited, the external magnetic field has directivity, and the requirements of breaking the nonpolar direct current arc cannot be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a double-side-wall insulating grid sheet, a nonpolar arc extinguishing structure and a direct current breaker, which are used for solving the technical problems that the arc extinguishing of the insulating grid sheet of a direct current arc only depends on the magnetic field and the airflow field of the arc, the elongation and the cooling effect of the insulating grid sheet on the arc are limited, and the external magnetic field has directivity and cannot meet the requirements of breaking the nonpolar direct current arc.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
The invention provides a double-side-wall insulated gate sheet, which comprises a side-wall insulated gate sheet group, wherein the side-wall insulated gate sheet group consists of a plurality of insulated gate sheets, the insulated gate sheets are perpendicular to an arc separation wall in a direct current breaker, and the insulated gate sheets are arranged in an extending manner along the movement direction of an arc.
In a specific implementation process, the width of the insulating grid sheet is less than half of the distance between the two arc separation walls.
In the specific implementation process, the insulating grid sheet is provided with a plurality of intermittent intervals, and the intermittent intervals are arranged along the length direction of the insulating grid sheet.
In the implementation process, the plurality of insulating grid sheets are continuously arranged to form a side wall insulating grid sheet group.
In the implementation process, the shape of the insulating grid sheet is arc-shaped.
In the specific implementation process, two groups of side wall insulating grid sheet groups are respectively arranged on the arc separating walls at two sides of a moving contact and a fixed contact in the direct current breaker.
The invention also provides a nonpolar arc extinguishing structure which comprises the double-side-wall insulating grid sheet, a moving contact, a fixed contact, an arc separating wall, a moving arc angle, a static arc angle and a permanent magnet group;
the movable contact is connected with the movable arc angle through a flexible wire, and the static contact is fixedly connected with the static arc angle; the arc separation walls are arranged at two sides of the moving contact and the fixed contact;
the partition arc wall comprises a first partition arc wall and a second partition arc wall; the double-side-wall insulating grid sheet comprises a first side-wall insulating grid sheet group and a second side-wall insulating grid sheet group; the first side wall insulating grid sheet group and the second side wall insulating grid sheet group are respectively arranged on the first partition arc wall and the second partition arc wall;
The permanent magnet group comprises a first permanent magnet, a second permanent magnet and a third permanent magnet;
the first permanent magnet is arranged on one side of the movable arc angle, which is away from the movable contact and the fixed contact; the second permanent magnet is arranged on one side of the first arc separation wall, which is away from the first side wall insulating grid sheet group; the third permanent magnet is arranged on one side of the second arc separation wall, which is away from the second side wall insulating grid sheet group;
The first polar surface of the first permanent magnet faces the moving arc angle; the first polar surface of the second permanent magnet is opposite to the first polar surface of the third permanent magnet, and the first polar surface of the second permanent magnet is the same as the first polar surface of the third permanent magnet and opposite to the first polar surface of the first permanent magnet.
In a specific implementation process, the first permanent magnet generates a first magnetic field component in a region between the moving contact, the fixed contact, the partition arc wall, the moving arc angle and the fixed arc angle, and the first magnetic field component is parallel to the partition arc wall.
In a specific implementation process, the second permanent magnet and the third permanent magnet generate a second magnetic field component which is close to the second permanent magnet and points to the third permanent magnet, and a third magnetic field component which is close to the third permanent magnet and points to the second permanent magnet.
The invention provides a direct current breaker which comprises double side wall insulation grid plates and a nonpolar arc extinguishing structure.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a pair of double-side-wall insulated gate sheets, which are oppositely arranged on the arc wall of a circuit breaker, are matched with an externally applied magnetic field with an arc current direction distinguishing function, can fully exert the functions of stretching and cooling the arc by the insulated gate sheets, and are effective to direct-current arcs in two current directions. In particular, since the insulating grid sheet is perpendicular to the arc separation wall to enhance the arc guiding effect, and cooperates with the magnetic field component generated by the permanent magnet, the arc can be more effectively guided to move along the surface of the arc separation wall, and the perpendicular arrangement ensures that the arc is more directly and definitely guided during movement, so that the possibility of the arc deviating from a preset path is reduced. The extension of the insulating barrier in the direction of movement of the arc can be arranged to increase the arc elongation efficiency, meaning that the arc is further elongated as it passes through each barrier. The elongated arc not only increases the heat dissipation area, but also helps to spread the energy of the arc so that it is more easily extinguished. The above configuration can enhance the arc cooling effect, and as the arc moves between the side wall insulating grid sets, it contacts the plurality of insulating grids, thereby increasing the frequency and efficiency of heat exchange. Frequent heat exchange helps to quickly reduce the temperature of the arc, further accelerating the extinguishing process of the arc.
The invention also provides a nonpolar arc extinguishing structure based on the double-side wall insulating grid sheet, and the double-side wall insulating grid sheet plays an important role in the nonpolar arc extinguishing structure, and effectively interacts with the electric arcs on the partition arc walls to elongate and cool the electric arcs, so that the quick extinction of the electric arcs is promoted. Specifically, when the movable contact and the fixed contact are separated to generate an electric arc, the double-side-wall insulating grid sheet can guide the electric arc to move along the surface of the arc separation wall through the special structural design, so that the contact area between the electric arc and the wall surface is increased, the electric arc is further prolonged, and the heat dissipation area of the electric arc is increased. Meanwhile, through heat exchange, the insulated grid sheet can effectively cool the electric arc, reduce the temperature of the electric arc and enable the electric arc to be extinguished more easily. The permanent magnet group and the double side wall insulating grid plates work cooperatively to jointly optimize the movement and extinction process of the electric arc, and combine two modes of magnetic field control and physical structure guiding to effectively control the movement track of the electric arc, and obviously improve the extinction efficiency by elongating and cooling the electric arc.
Further, the first magnetic field component generated by the first permanent magnet in the permanent magnet group, together with the second permanent magnet and the third permanent magnet, strengthen the first magnetic field component, so that the direction of the arc current can effectively guide the arc to the surface of the arc separation wall, thereby ensuring that the arc moves according to a preset path. In addition, the second permanent magnet and the third permanent magnet not only strengthen the first magnetic field component, but also respectively generate magnetic field components directed toward each other. The additional magnetic field component can further guide the arc to move along the surface of the arc separation wall, so that the arc can not directly cross the air gap between the contacts, and the accuracy and reliability of arc control are improved.
The invention also provides a direct current breaker based on the double-side-wall insulating grid sheet and the nonpolar arc extinguishing structure, and the nonpolar arc extinguishing structure ensures that the electric arc can be rapidly guided to the surface of the arc separation wall after being generated by precisely controlling the magnetic field distribution, and is effectively prolonged and cooled under the action of the double-side-wall insulating grid sheet, thereby obviously improving the arc extinguishing efficiency.
Drawings
Fig. 1 is a schematic view of a nonpolar arc suppressing structure of the present invention;
Fig. 2 is a schematic view of a permanent magnet assembly of the nonpolar arc suppressing structure of the present invention;
fig. 3 is a schematic view of a sidewall insulating grid set on a partition wall according to an embodiment of the present invention.
Wherein: 1-a moving contact; 2-a fixed contact; 3-arc separation walls; 31-a first arc partition wall; 311-a first sidewall insulating gate set; 3111-a first insulating gate; 3112-first break interval; 32-a second arc partition wall; 321-a second sidewall insulating gate set; 3211-a second insulated gate sheet; 4-moving arc angle; 5-static arc angle; 6-permanent magnet group; 61-a first permanent magnet; 62-a second permanent magnet; 63-a third permanent magnet.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1 to 3, the present invention provides a double sidewall insulation grid, a non-polar arc extinguishing structure and a dc breaker.
As shown in fig. 3, the first aspect of the present invention provides a double-sidewall insulating grid sheet, which comprises a sidewall insulating grid sheet set, wherein the sidewall insulating grid sheet set is composed of a plurality of insulating grid sheets, the insulating grid sheets are arranged perpendicular to an arc separation wall 3 in a dc breaker, and the insulating grid sheets extend along the movement direction of an arc.
In the specific implementation process, a plurality of insulated gate sheets are continuously arranged to form a side wall insulated gate sheet group, the width of each insulated gate sheet is smaller than half of the distance between two isolation arc walls 3, and a plurality of intermittent intervals are arranged on each insulated gate sheet and are arranged along the length direction of each insulated gate sheet.
The two groups of side wall insulating grid plates are respectively arranged on the arc separating walls 3 at the two sides of the moving contact 1 and the fixed contact 2 in the direct current breaker.
Wherein the intermittent spacing can optimize the arc dispersion effect so that the arc does not continuously contact the same surface as it passes through the insulated gate sheet, but is dispersed into a plurality of small areas. This dispersion helps to increase the contact point between the arc and the grid, further elongating the arc, and promotes dissipation of the arc energy. It is also possible to enhance the arc cooling effect, since the arc is dispersed to a plurality of small areas, the heat exchange area between each area and the insulating grid sheet increases, thereby improving the cooling efficiency of the arc. At the same time, the intermittent intervals also help to increase the convection of the electric arc and the surrounding air, and further promote the cooling of the electric arc. The shape and the movement mode of the arc can be changed due to factors such as current magnitude, switching speed and the like, and the design of the intermittent intervals enables the insulated grid sheet to be more flexibly adapted to different arc shapes, so that the arc can be effectively lengthened and cooled under various conditions.
The insulating grids are arranged to extend in the direction of movement of the arc, meaning that the arc is further elongated as it passes through each grid. The elongated arc not only increases the heat dissipation area, but also helps to spread the energy of the arc so that it is more easily extinguished.
Further preferably, the shape of the insulating grid sheet is arc-shaped. The insulating grid sheet is made of a high-temperature-resistant insulating material.
As shown in fig. 1 and 2, the second aspect of the present invention provides a nonpolar arc extinguishing structure, which comprises a double-side-wall insulating grid sheet, a moving contact 1, a fixed contact 2, an arc separating wall 3, a moving arc angle 4, a static arc angle 5 and a permanent magnet group 6.
The movable contact 1 is connected with the movable arc angle 4 through a flexible wire, and the fixed contact 2 is fixedly connected with the static arc angle 5; the arc separation walls 3 are arranged on two sides of the moving contact 1 and the fixed contact 2; the movable contact 1 can move relative to the fixed contact 2, so that the movable contact 1 and the fixed contact 2 are closed and separated, one end of the fixed contact 2 is overlapped with one end of the static arc angle 5, one surface of the movable arc angle 4 is opposite to one surface of the static arc angle 5, and an arc extinguishing chamber is arranged between one surface of the movable arc angle 4 and one surface of the static arc angle 5.
The partition wall 3 includes a first partition wall 31 and a second partition wall 32; the double sidewall insulated gate sheet includes a first sidewall insulated gate sheet group 311 and a second sidewall insulated gate sheet group 321; the first sidewall insulating barrier group 311 and the second sidewall insulating barrier group 321 are provided on the first arc partition wall 31 and the second arc partition wall 32, respectively.
The permanent magnet group 6 includes a first permanent magnet 61, a second permanent magnet 62, and a third permanent magnet 63; the first permanent magnet 61 is arranged on one side of the movable arc angle 4, which faces away from the movable contact 1 and the fixed contact 2; the second permanent magnet 62 is disposed on the side of the first arc partition wall 31 facing away from the first sidewall insulating barrier group 311; the third permanent magnet 63 is disposed on the side of the second arc partition wall 32 facing away from the second sidewall insulating grid set 321; the first polar surface of the first permanent magnet 61 faces the moving arc angle 4; the first polar surface of the second permanent magnet 62 is disposed opposite to the first polar surface of the third permanent magnet 63, and the first polar surface of the second permanent magnet 62 is the same as the first polar surface of the third permanent magnet 63 and opposite to the first polar surface of the first permanent magnet 61.
The first permanent magnet 61 generates a first magnetic field component in the region between the moving contact 1, the stationary contact 2, the partition wall 3, the moving arc angle 4 and the stationary arc angle 5, the first magnetic field component being parallel to the partition wall 3. The second permanent magnet 62 and the third permanent magnet 63 generate a second magnetic field component directed toward the third permanent magnet 63 near the second permanent magnet 62 and a third magnetic field component directed toward the second permanent magnet 62 near the third permanent magnet 63.
When the current direction of the arc generated by the separation of the moving contact 1 and the fixed contact 2 in the direct current breaker is directed to the fixed contact 2by the moving contact 1, the arc is biased to the second permanent magnet 62 under the action of the first magnetic field component, moves along the surface of the first arc separation wall 31 under the action of the second magnetic field component and passes through the first side wall insulation grid set 311.
When the current direction of the arc generated by the separation of the moving contact 1 and the fixed contact 2 in the direct current breaker is directed to the moving contact 1 by the fixed contact 2, the arc is biased to the third permanent magnet 63 under the action of the first magnetic field component, moves along the surface of the second arc separation wall 32 under the action of the third magnetic field component and passes through the second side wall insulation grid sheet group 321.
The first magnetic field component generated by the first permanent magnet 61 is parallel to the arc-dividing wall 3, which ensures that the arc is precisely directed to the surface of the arc-dividing wall 3 after being generated, and the magnetic field component parallel to the arc-dividing wall 3 enables the arc to move along a predetermined path without randomly drifting or crossing the gap between the contacts. The second and third magnetic field components generated by the second and third permanent magnets 62, 63 further enhance the stability of the arc control, both of which not only help maintain the movement of the arc along the arc-separating wall 3, but also act somewhat "tie-in" to the arc preventing it from escaping the intended path. This magnetic field configuration is effective to control and direct the arc regardless of the direction of the arc current. When the current direction is changed, the electric arc changes the movement direction under the action of the corresponding magnetic field component, but always keeps moving on the surface of the arc separation wall, and is effectively elongated and cooled by the insulating grid sheet.
The third aspect of the invention provides a direct current breaker, which comprises the double-side-wall insulating grid sheet and a nonpolar arc extinguishing structure.
According to the direct current breaker, the magnetic field distribution is precisely controlled through the nonpolar arc extinguishing structure, so that the electric arc can be rapidly guided to the surface of the partition wall after being generated, and effectively prolonged and cooled under the action of the double-side-wall insulating grid sheet, the arc extinguishing efficiency is remarkably improved, and the direct current breaker can rapidly cut off the electric arc in a short time, so that the safety of a circuit and equipment is protected.
Examples
As shown in fig. 3, the first aspect of the present embodiment provides a double-sidewall insulating grid sheet, which includes a sidewall insulating grid sheet set having a first sidewall insulating grid sheet set 311 and a second sidewall insulating grid sheet set 321 respectively disposed on the arc walls 3 on both sides of the moving contact 1 and the fixed contact 2 of the circuit breaker, the first sidewall insulating grid sheet set 311 being disposed on the first arc wall 31, and the second sidewall insulating grid sheet set 321 being disposed on the second arc wall 32.
Wherein the first sidewall insulating grid set 311 includes one or more first insulating grid plates 3111 perpendicular to the surface of the first arc partition wall 31, the first insulating grid plates 3111 extending in the arc movement direction; the second side wall insulating grid set 321 includes one or more second insulating grids 3211 perpendicular to the surface of the second arc partition wall 32, the second insulating grids 3211 extending in the arc movement direction.
The width of the first insulating gate 3111 of the first sidewall insulating gate sheet group 311 is smaller than half the pitch between the first and second arc walls 31 and 32, and the width of the second insulating gate sheet 3211 of the second sidewall insulating gate sheet group 321 is also smaller than half the pitch between the first and second arc walls 31 and 32.
The first sidewall insulating grid set 311 is composed of one or more continuous first insulating grid plates 3111, and further one or more first intermittent intervals 3112 are provided along the length direction of the first insulating grid plates 3111. The second sidewall insulating grid set 321 is composed of one or more continuous second insulating grid segments 3211, and one or more second intermittent intervals are further arranged along the length direction of the second insulating grid segments 3211.
The first sidewall insulating grid set 311 includes one or more flat plate first insulating grids 3111 along the arc moving direction, and may also include one or more first insulating grids 3111 along the arc moving direction, that is, the first insulating grid 3111 is arc-shaped. The second sidewall insulating grid set 321 includes one or more flat plate second insulating grids 3211 along the arc moving direction, and may also include one or more second insulating grids 3211 along the arc moving direction, that is, the shape of the second insulating grid 3211 is arc-shaped.
The materials of the first insulating gate 3111 and the second insulating gate 3211, which are the insulating gate sheets, are high-temperature resistant insulating materials.
As shown in fig. 1 and 2, the present embodiment further provides a nonpolar arc extinguishing structure, which has the double side wall insulating grid sheet as above, and further includes a moving contact 1, a fixed contact 2, a moving arc angle 4, a fixed arc angle 5, and a permanent magnet group 6, where the permanent magnet group 6 includes a first permanent magnet 61 disposed on a side of the moving arc angle 4 facing away from the moving contact 1 and the fixed contact 2, and a first polar surface of the first permanent magnet 61 faces the moving arc angle 4. The permanent magnet group 6 further includes a second permanent magnet 62 disposed on a side of the first arc partition wall 31 facing away from the first sidewall insulating barrier sheet group 311, and a third permanent magnet 63 disposed on a side of the second arc partition wall 32 facing away from the second sidewall insulating barrier sheet group 321. The first polar surface of the second permanent magnet 62 is disposed opposite to the first polar surface of the third permanent magnet 63, and the first polar surface of the second permanent magnet 62 is the same as the first polar surface of the third permanent magnet 63 in polarity and opposite to the first polar surface of the first permanent magnet 61.
The magnetic field generated by the first permanent magnet 61 disposed at one side of the moving arc angle 4 in the region between the moving contact 1, the fixed contact 2, the partition arc wall 3, the static arc angle 5 and the moving arc angle 4 has a first magnetic field component B1 parallel to the partition arc wall 3, and the second permanent magnet 62 and the third permanent magnet 63 disposed at one side of the first partition arc wall 31 and the second partition arc wall 32, since the first polarity surface of the second permanent magnet 62 and the first polarity surface of the third permanent magnet 63 are the same and opposite to the first polarity surface of the first permanent magnet 61, the arrangement of the second permanent magnet 62 and the third permanent magnet 63 intensifies the first magnetic field component B1 parallel to the partition arc wall 3, and simultaneously generates a second magnetic field component B2 directed toward the third permanent magnet 63 near the second permanent magnet 62 and a third magnetic field component B3 directed toward the second permanent magnet 62 near the third permanent magnet 63. When the current direction of the electric arc generated by the separation of the moving contact 2 points to the fixed contact 2 from the moving contact 1, the electric arc is deflected to the second permanent magnet 62 under the action of the first magnetic field component B1, then moves along the surface of the first arc separation wall 31 under the action of the second magnetic field component B2, and is effectively lengthened and cooled under the action of the first side wall insulating grid sheet group 311; if the current direction of the arc is from the fixed contact 2 to the moving contact 1, the arc will deflect to the third permanent magnet 63 under the action of the first magnetic field component B1, and then move along the surface of the second arc separation wall 32 under the action of the third magnetic field component B3, and be effectively elongated and cooled under the action of the second side wall insulating grid set 321.
The moving contact 1 can move relative to the fixed contact 2, so that the closing and the separation of the moving contact 1 and the fixed contact 2 are realized. One end of the fixed contact 2 is overlapped with one end of the static arc angle 5, one surface of the movable arc angle 4 is opposite to one surface of the static arc angle 5, and an arc extinguishing chamber is arranged between one surface of the movable arc angle 4 and one surface of the static arc angle 5. The device further comprises an arc extinguishing grid sheet set, wherein a first side wall insulating grid sheet set 311 and a second side wall insulating grid sheet set 321 are arranged among the moving contact 1, the fixed contact 2 and the arc extinguishing chamber.
The embodiment also provides a direct current breaker which is provided with any one of the double-side-wall insulating grid sheets and the nonpolar arc extinguishing structure.
According to the embodiment, the pair of side wall insulating grid sheet groups oppositely arranged on the arc separation wall 3 in the circuit breaker are matched with the external magnetic field with the arc current direction distinguishing function, so that the stretching and cooling effects of the insulating grid sheets on the arc can be fully exerted, meanwhile, the scheme is effective on direct current arcs in two current directions, and is small in size, low in cost and simple in structure.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The double-side-wall insulated gate sheet is characterized by comprising a side-wall insulated gate sheet group, wherein the side-wall insulated gate sheet group consists of a plurality of insulated gate sheets, the insulated gate sheets are perpendicular to an arc separation wall (3) in the direct current breaker, and the insulated gate sheets extend along the arc movement direction.
2. Double sidewall insulating grid according to claim 1, characterized in that the width of the insulating grid is less than half the distance between two partition walls (3).
3. The double-side-wall insulated gate sheet according to claim 1, wherein a plurality of intermittent intervals are provided on the insulated gate sheet, and the intermittent intervals are provided along the length direction of the insulated gate sheet.
4. The double sidewall insulated gate of claim 1, wherein the plurality of insulated gate sheets are arranged in series to form a sidewall insulated gate stack.
5. The double sidewall insulated gate sheet of claim 1, wherein the insulated gate sheet is arcuate in shape.
6. Double-side-wall insulated gate sheet according to claim 1, characterized in that two sets of the side-wall insulated gate sheet are arranged on the arc-dividing walls (3) on both sides of the moving contact (1) and the stationary contact (2) in a direct current circuit breaker, respectively.
7. A nonpolar arc extinguishing structure, characterized by comprising the double sidewall insulating grid sheet, the moving contact (1), the static contact (2), the arc separating wall (3), the moving arc angle (4), the static arc angle (5) and the permanent magnet group (6) according to any one of claims 1 to 6;
The movable contact (1) is connected with the movable arc angle (4) through a flexible wire, and the static contact (2) is fixedly connected with the static arc angle (5); the arc separation walls (3) are arranged on two sides of the moving contact (1) and the fixed contact (2);
The partition arc wall (3) comprises a first partition arc wall (31) and a second partition arc wall (32); the double-side-wall insulating grid sheet comprises a first side-wall insulating grid sheet group (311) and a second side-wall insulating grid sheet group (321); the first side wall insulating grid sheet group (311) and the second side wall insulating grid sheet group (321) are respectively arranged on the first arc partition wall (31) and the second arc partition wall (32);
the permanent magnet group (6) comprises a first permanent magnet (61), a second permanent magnet (62) and a third permanent magnet (63);
The first permanent magnet (61) is arranged on one side of the movable arc angle (4) which faces away from the movable contact (1) and the fixed contact (2); the second permanent magnet (62) is arranged on one side of the first arc separation wall (31) away from the first side wall insulating grid sheet group (311); the third permanent magnet (63) is arranged on one side of the second arc separation wall (32) away from the second side wall insulating grid sheet group (321);
the first polar surface of the first permanent magnet (61) faces the moving arc angle (4); the first polar surface of the second permanent magnet (62) is opposite to the first polar surface of the third permanent magnet (63), and the first polar surface of the second permanent magnet (62) is the same as the first polar surface of the third permanent magnet (63) and opposite to the first polar surface of the first permanent magnet (61).
8. The nonpolar arc suppressing structure according to claim 7, wherein the first permanent magnet (61) generates a first magnetic field component in a region between the moving contact (1), the stationary contact (2), the partition wall (3), the moving arc angle (4) and the static arc angle (5), the first magnetic field component being parallel to the partition wall (3).
9. The nonpolar arc suppressing structure according to claim 7, wherein the second permanent magnet (62) and the third permanent magnet (63) generate a second magnetic field component directed toward the third permanent magnet (63) near the second permanent magnet (62) and a third magnetic field component directed toward the second permanent magnet (62) near the third permanent magnet (63).
10. A direct current circuit breaker comprising a double sidewall insulating grid as claimed in any one of claims 1 to 6 and a non-polar arc suppressing structure as claimed in any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410589961.4A CN118471751A (en) | 2024-05-13 | 2024-05-13 | Double-side-wall insulating grid sheet, nonpolar arc extinguishing structure and direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410589961.4A CN118471751A (en) | 2024-05-13 | 2024-05-13 | Double-side-wall insulating grid sheet, nonpolar arc extinguishing structure and direct current breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118471751A true CN118471751A (en) | 2024-08-09 |
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ID=92169391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410589961.4A Pending CN118471751A (en) | 2024-05-13 | 2024-05-13 | Double-side-wall insulating grid sheet, nonpolar arc extinguishing structure and direct current breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118471751A (en) |
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2024
- 2024-05-13 CN CN202410589961.4A patent/CN118471751A/en active Pending
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