CN214313058U - Miniature non-sealing direct current contactor arc extinguishing structure - Google Patents
Miniature non-sealing direct current contactor arc extinguishing structure Download PDFInfo
- Publication number
- CN214313058U CN214313058U CN202022926167.4U CN202022926167U CN214313058U CN 214313058 U CN214313058 U CN 214313058U CN 202022926167 U CN202022926167 U CN 202022926167U CN 214313058 U CN214313058 U CN 214313058U
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- Prior art keywords
- arc extinguishing
- arc
- contactor
- magnetic steel
- sealed
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- 238000007789 sealing Methods 0.000 title abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 79
- 239000010959 steel Substances 0.000 claims abstract description 79
- 230000003068 static effect Effects 0.000 claims abstract description 22
- 239000000919 ceramic Substances 0.000 claims description 25
- 238000007664 blowing Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 27
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 16
- 230000002829 reductive effect Effects 0.000 description 10
- 238000002679 ablation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000004593 Epoxy Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004382 potting Methods 0.000 description 6
- 238000005476 soldering Methods 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 5
- 238000005219 brazing Methods 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model provides a miniaturized non-sealed direct current contactor arc extinguishing structure, including the explosion chamber, be equipped with two static contacts, moving contact in the explosion chamber, the static contact is relative with the moving contact position, is equipped with two first magnet steels outside the explosion chamber, and two first magnet steels set up on two static contact center connecting lines, still is equipped with two second magnet steels outside the explosion chamber, and two second magnet steels set up respectively in the both sides of two static contact center connecting lines; and an arc striking grid is also arranged in the arc extinguishing chamber and is arranged between the fixed contact and the first magnetic steel. The utility model discloses arc extinguishing structure has strengthened current non-sealing contactor explosion chamber arc extinguishing ability, has improved non-sealing contactor electric life level, is favorable to reducing the explosion chamber volume simultaneously, is convenient for realize the miniaturized design of contactor.
Description
Technical Field
The utility model belongs to the technical field of the contactor, especially, relate to a miniaturized non-sealed direct current contactor arc extinguishing structure.
Background
The arc extinguishing system is a key part in the contactor, when the contactor is connected and disconnected with high current, electric arcs can be generated between the movable contact and the fixed contact, the energy of the electric arcs is extremely high, if no measures are taken for arc extinguishing, the contact contacts and peripheral parts of the contact contacts can be seriously ablated, and the service life of the contactor is greatly reduced.
Therefore, arc extinguishing measures are taken in the design of the contactor, and the existing arc extinguishing technology is different among ceramic soldering sealing contactors, epoxy potting contactors and non-sealing contactors. In the ceramic soldering sealing contactor, generally, a ceramic arc extinguishing cavity is adopted, ceramics have a cooling arc extinguishing effect, the ceramic arc extinguishing cavity is made of ceramics, the ceramic arc extinguishing cavity can form an arc extinguishing chamber with better sealing performance by welding with a static contact and an actuating system, arc extinguishing gases such as hydrogen and nitrogen are filled inside the ceramic arc extinguishing cavity, meanwhile, second magnetic steel and first magnetic steel for enhancing a magnetic field are additionally arranged outside the cavity, electric arc is biased through the magnetic field, the ceramic arc extinguishing cavity is in contact with the ceramic arc extinguishing chamber, and the ceramic cooling arc extinguishing effect is utilized to play a better arc extinguishing effect. The structure is shown in fig. 1.
The arc extinguishing effect is better, but owing to adopted ceramic brazing seal structure, the technological process of brazing is complicated, for guaranteeing the leakproofness, reduces filling gas and reveals the risk, and is high to the requirement of brazing quality, and the technological process control requires highly, and the product percent of pass is difficult to guarantee.
The epoxy potting contactor changes the ceramic soldering sealing structure into a nylon arc extinguishing chamber epoxy glue pouring sealing structure, and reserves measures of filling arc extinguishing gas inside and second magnetic steel outside, as shown in figure 2. Although the ceramic brazing process link is omitted, the epoxy potting process also needs accurate process control to ensure the sealing performance of the arc extinguish chamber, and the qualification rate is difficult to ensure as same as ceramic brazing.
The non-sealed contactor does not adopt filling arc-extinguishing gas, so that complex ceramic soldering or epoxy potting procedures are not needed, the assembly process is greatly simplified, and the qualification rate is high. In order to achieve the arc extinguishing effect, the distance between the moving contact and the static contact is increased, the arc is difficult to maintain by lengthening the arc, and meanwhile, the magnetic steel arc blowing measure is adopted to realize arc blowing and arc extinguishing, as shown in figure 3.
The existing non-sealed contactor arc extinguish chamber is made of nylon materials, is convenient to form and has certain insulating and arc ablation resistance, but compared with ceramic materials, the existing non-sealed contactor arc extinguish chamber is poor in ablation resistance, so that the existing non-sealed contactor arc extinguish chamber is low in electric service life and difficult to achieve a good application effect. Meanwhile, in order to prevent over ablation of the arc extinguish chamber, the distance between the wall of the arc extinguish chamber and a movable contact and a fixed contact is large, so that the arc extinguish chamber is large in size and cannot be designed in a miniaturized mode.
Therefore, there is a need in the art to develop an arc extinguishing structure that can overcome the above-mentioned problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a miniaturized non-sealed direct current contactor arc extinguishing structure can solve the technical problem that current non-sealed contactor arc extinguishing ability is weak, the electric life is limited and the strong volume of arc extinguishing is big.
The utility model provides a miniaturized non-sealing direct current contactor arc extinguishing structure, including the explosion chamber, be equipped with two static contacts, moving contact in the explosion chamber, the static contact is relative with the moving contact position, be equipped with two first magnet steels outside the explosion chamber, two first magnet steels set up on two static contact center connecting lines, still be equipped with two second magnet steels outside the explosion chamber, two second magnet steels set up respectively in two sides of static contact center connecting line;
and an arc striking grid is further arranged in the arc extinguishing chamber and arranged between the fixed contact and the first magnetic steel.
Preferably, the arc ignition grid is provided as a ceramic arc ignition grid.
Preferably, the edges of contact surfaces of the moving contact and the fixed contact are arranged to be round structures.
Preferably, the second magnetic steel is arranged into an enhanced magnetic steel arc blowing structure with an anti-reverse chamfer.
Preferably, the second magnetic steel is set to be arc-blowing magnetic steel.
Preferably, the two second magnetic steels are arranged on a perpendicular bisector of a connecting line of centers of the two fixed contacts.
Preferably, the first magnetic steel and the second magnetic steel are arranged in the same direction.
Preferably, an installation groove is formed in the arc extinguish chamber, and the first magnetic steel and the second magnetic steel are embedded in the installation groove.
Preferably, the fixed contact and the arc extinguish chamber are welded into an integrated structure or are formed into an integrated structure through injection molding.
Preferably, the first magnetic steel is arranged into a magnetic conductive sheet, and the magnetic conductive sheet is arranged into a U-shaped structure.
The utility model discloses a miniaturized non-sealed direct current contactor arc extinguishing structure compares prior art and has following beneficial effect:
1. the utility model discloses adopt the design of ceramic striking bars in non-sealing contactor arc extinguishing chamber, reach the effect of quick arc extinguishing, reduced electric arc to the ablation effect of contact, also prevented electric arc simultaneously to the ablation of nylon explosion chamber lateral wall, improved contactor electricity life level.
2. The utility model discloses an increased anti-inverted chamfer structural design to second magnet steel and explosion chamber second magnet steel mounting groove, reached the effect of the blind dress of magnet steel, effectively improved product assembly efficiency, reduced the fatal problem that the arc blowing effect that the magnetic steel polarity dress was anti-brought disappears, improved product reliability.
3. The utility model discloses an arc extinguishing structure has strengthened current non-sealing contactor explosion chamber arc extinguishing ability, has improved non-sealing contactor electric life level, is favorable to reducing the explosion chamber volume simultaneously, is convenient for realize the miniaturized design of contactor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an arc extinguish chamber structure of a ceramic soldering sealing contactor in the prior art;
FIG. 2 is a schematic structural diagram of an arc extinguishing chamber structure of an epoxy potting contactor in the prior art;
FIG. 3 is a schematic structural diagram of an arc extinguishing chamber structure of a non-sealed contactor in the prior art;
fig. 4 is a schematic structural view of an arc extinguishing structure of the miniaturized non-sealed dc contactor of the present invention;
fig. 5 is an explosion structure diagram of the arc extinguishing structure of the miniaturized non-sealed dc contactor of the present invention;
fig. 6 is a schematic view of a part of a structure of an arc extinguishing structure of a miniaturized non-sealed dc contactor according to the present invention;
fig. 7 is a schematic view of a partial structure of an arc extinguishing structure of the miniaturized non-sealed dc contactor according to the present invention;
fig. 8 is a schematic diagram of an arc extinguishing structure of the miniaturized non-sealed dc contactor according to the present invention;
FIG. 9 is a schematic view of the magnetic field blowing principle in the arc extinguish chamber of the present invention;
fig. 10 is a schematic view of the arc extinguishing principle of the arc striking grid in the arc extinguishing chamber of the present invention.
Description of reference numerals:
1. arc extinguish chamber 2, moving contact 21 and moving contact
3. Static contact 31, static contact 4 and first magnetic steel
5. Second magnetic steel 6, arc striking grid 7 and arc blowing magnetic field
8. Reverse chamfer
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
FIG. 1 is a schematic structural diagram of an arc extinguish chamber structure of a ceramic soldering sealing contactor in the prior art; FIG. 2 is a schematic structural diagram of an arc extinguishing chamber structure of an epoxy potting contactor in the prior art; fig. 3 is a schematic structural diagram of an arc extinguishing chamber structure of a non-sealed contactor in the prior art.
As shown in fig. 4 to 7, for the utility model provides a pair of miniaturized non-sealed direct current contactor arc extinguishing structure, including explosion chamber 1, 1 is equipped with two static contacts 3 in this explosion chamber, moving contact 2, and static contact 3 is relative with moving contact 2 positions, still is equipped with two first magnet steel 4 in the explosion chamber 1, and two first magnet steel 4 set up on two static contact 3 center connection lines, still are equipped with two second magnet steel 5 in the explosion chamber 1, and two second magnet steel 5 set up the both sides at two static contact 3 center connection lines respectively. Wherein, still be provided with striking bars 6 in the explosion chamber 1, striking bars 6 set up between static contact 3 and first magnet steel 4, correspondingly, are provided with striking bars recess in the explosion chamber 1, only need during the installation with striking bars 6 insert striking bars recess can realize fixed connection.
The static contact 3 and the shell of the arc extinguish chamber 1 are welded into an integrated structure or are injected into an integrated structure. When the arc extinguish chamber 1 is a ceramic arc extinguish chamber, the static contact 3 and the arc extinguish chamber 1 are arranged into an integrated structure in a welding mode; when the arc extinguish chamber 1 is a nylon arc extinguish chamber, the static contact 3 and the arc extinguish chamber 1 are arranged into an integrated structure in an injection molding mode.
In a further embodiment of the invention, the ignition grid 6 is provided as a ceramic ignition grid. The arc striking grid 6 is transversely arranged on the transverse direction of the central connecting line of the two fixed contacts 3.
In a further embodiment of the present invention, as shown in fig. 5 and 7, the second magnetic steel 5 is configured as an enhanced magnetic steel arc blowing structure having an anti-reverse chamfer 8. Preferably, the second magnetic steel 5 is set as a blowing magnetic steel. Preferably, as shown in fig. 5, the first magnetic steel 4 is configured as a magnetic conductive sheet, and the magnetic conductive sheet is configured as a U-shaped structure.
The enhanced magnetic steel arc blowing structure is characterized in that two second magnetic steels 5 are communicated by adopting a magnetic conductive sheet (a first magnetic steel 4), the two second magnetic steels 5 are respectively adsorbed on two surfaces on the inner side of the magnetic conductive sheet, a magnetic line of force passes through the magnetic conductive sheet from one second magnetic steel 5 to flow to the other second magnetic steel 5 and penetrates out of the other second magnetic steel 5, the magnetic line of force passes through an air region in the middle of a movable contact and a fixed contact, the original second magnetic steel 5 is returned, the whole magnetic resistance is reduced, and the magnetic field between the two second magnetic steels 5 can be enhanced by the arrangement.
In order to facilitate the installation, an installation groove is arranged in the arc extinguish chamber 1, and the first magnetic steel 4 and the second magnetic steel 5 are embedded in the installation groove.
The utility model discloses adopt the design of pottery striking grid in non-sealing contactor explosion chamber 1, because striking grid 6 is ceramic material, have the effect of putting out an arc. As shown in fig. 8 to 10, when the main circuit is disconnected, electric arcs can be generated between the upper and lower corresponding moving and static contacts 31, under the action of an arc-blowing magnetic field 7 formed by arc-blowing magnetic steel, the electric arcs can be pulled to two sides, and after the electric arcs contact ceramic arc-striking grids 6 on two sides, the electric arcs can be rapidly extinguished under the cooling action, so that the rapid arc-extinguishing effect is achieved, the ablation effect of the electric arcs on the contacts is reduced, meanwhile, the ablation of the electric arcs on the side wall of the nylon arc-extinguishing chamber 1 is also prevented, and the electric service life level of the contactor is improved.
In order to further increase the difficulty of arcing between the movable contact 21 and the fixed contact 31, the contact surface between the movable contact 21 and the fixed contact 31 is configured to be a rounded structure or a circular arc shape, as shown in fig. 5 and 6. The design of edge fillet structure has effectively reduced the marginal electric field distortion of sound contact 31, has increased the arcing degree of difficulty, has reduced the time of arcing, has reduced the electric arc to main circuit spare part (sound contact 3, contact) and the ablation of explosion chamber 1, with the combined action of striking grid 6, has improved non-sealing contactor's electric life level.
The utility model discloses an increased the anti-reverse chamfer 8 structural design to second magnet steel 5 and explosion chamber 1 interior second magnet steel 5 mounting groove, increased anti-reverse chamfer 8 promptly in second magnet steel 5 upper right corner or upper left corner for no matter how the assembly, the arc blow magnet steel polarity can not appear the dress and reverse, reach the effect of the blind dress of magnet steel, effectively improved product assembly efficiency, reduced the fatal problem that the arc blow effect that the magnetic steel polarity dress was reversed and was brought disappeared, improved product reliability.
The utility model discloses an arc extinguishing structure has strengthened current non-sealing contactor explosion chamber arc extinguishing ability, has improved non-sealing contactor electric life level, is favorable to reducing 1 volume of explosion chamber simultaneously, is convenient for realize the miniaturized design of contactor.
Preferably, two second magnet steels 5 are arranged on the perpendicular bisector of the connecting line of the centers of the two fixed contacts 3, so that the magnetic induction intensity in the arc extinguish chamber 1 is more uniform, and the magnetic induction intensity can be further increased.
Preferably, the first magnetic steel 4 and the second magnetic steel 5 are arranged in the same direction. Specifically, two first magnet steels 4 are placed in the same direction (i.e. N, S poles of two magnet steels are opposite), and two second magnet steels 5 are placed in the same direction as the two first magnet steels 4.
The utility model discloses on current non-sealed contactor basis, increased ceramic striking bars 6 in its explosion chamber 1 for go out the arc extinguishing arc, and carried out the institutional advancement to the contact of sound contact 3, changed its contact surface edge into fillet structure, further reduced the distortion of marginal electric field, the increase degree of difficulty of arcing, the adoption has the enhancement formula magnet steel arc blowing structure of preventing reverse chamfer 8 simultaneously. The comprehensive effect of the three measures strengthens the arc extinguishing capability of the arc extinguishing chamber 1 of the existing non-sealing contactor, improves the electrical service life level of the non-sealing contactor, and is favorable for reducing the volume of the arc extinguishing chamber and convenient for realizing the miniaturized design of the contactor.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. An arc extinguishing structure of a miniaturized non-sealed direct current contactor is characterized by comprising an arc extinguishing chamber, wherein two fixed contacts and two moving contacts are arranged in the arc extinguishing chamber, the fixed contacts are opposite to the moving contacts, two first magnetic steels are arranged outside the arc extinguishing chamber and are arranged on a central connecting line of the two fixed contacts, two second magnetic steels are also arranged outside the arc extinguishing chamber and are respectively arranged on two sides of the central connecting line of the two fixed contacts;
and an arc striking grid is further arranged in the arc extinguishing chamber and arranged between the fixed contact and the first magnetic steel.
2. The miniaturized non-sealed DC contactor arc extinguishing structure according to claim 1, wherein the arc striking grid is provided as a ceramic arc striking grid.
3. The arc extinguishing structure of the miniaturized non-sealed DC contactor as claimed in claim 1, wherein the contact surface edge of the moving contact and the static contact is configured as a round angle structure.
4. The arc extinguishing structure of the miniaturized non-sealed direct current contactor according to claim 1, wherein the second magnetic steel is provided with an enhanced magnetic steel arc blowing structure with an anti-reverse chamfer.
5. The arc extinguishing structure of the miniaturized non-sealed DC contactor as claimed in claim 4, wherein the second magnetic steel is configured as an arc-blowing magnetic steel.
6. The arc extinguishing structure of the miniaturized non-sealed DC contactor as claimed in claim 1, wherein the two second magnetic steels are disposed on a perpendicular bisector of a connecting line of centers of the two stationary contacts.
7. The arc extinguishing structure of the miniaturized non-sealed DC contactor as claimed in claim 1, wherein the first magnetic steel and the second magnetic steel are arranged in the same direction.
8. The arc extinguishing structure of the miniaturized non-sealed direct current contactor according to claim 1, wherein an installation groove is formed in the arc extinguishing chamber, and the first magnetic steel and the second magnetic steel are embedded in the installation groove.
9. The miniaturized non-sealed DC contactor arc extinguishing structure according to claim 8, wherein the stationary contact and the arc extinguishing chamber are welded into an integrated structure or are injection molded into an integrated structure.
10. The arc extinguishing structure of the miniaturized non-sealed DC contactor as claimed in claim 1, wherein the first magnetic steel is configured as a magnetic conductive sheet, and the magnetic conductive sheet is configured as a U-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926167.4U CN214313058U (en) | 2020-12-07 | 2020-12-07 | Miniature non-sealing direct current contactor arc extinguishing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926167.4U CN214313058U (en) | 2020-12-07 | 2020-12-07 | Miniature non-sealing direct current contactor arc extinguishing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214313058U true CN214313058U (en) | 2021-09-28 |
Family
ID=77852282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022926167.4U Expired - Fee Related CN214313058U (en) | 2020-12-07 | 2020-12-07 | Miniature non-sealing direct current contactor arc extinguishing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214313058U (en) |
-
2020
- 2020-12-07 CN CN202022926167.4U patent/CN214313058U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220126 Address after: 100000 No. 106, unit 2, building 5, zone 1, yuandayuan, Century City, Haidian District, Beijing Patentee after: Rong Guoren Address before: 100094 209, 2nd floor, building 2, South Tangjialing village, Haidian District, Beijing Patentee before: Beijing tongnai Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 |
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| CF01 | Termination of patent right due to non-payment of annual fee |