CN219998123U - Arc extinguishing structure of contactor contact - Google Patents
Arc extinguishing structure of contactor contact Download PDFInfo
- Publication number
- CN219998123U CN219998123U CN202321238806.5U CN202321238806U CN219998123U CN 219998123 U CN219998123 U CN 219998123U CN 202321238806 U CN202321238806 U CN 202321238806U CN 219998123 U CN219998123 U CN 219998123U
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- CN
- China
- Prior art keywords
- binding post
- stop block
- movable contact
- plastic stop
- ceramic cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000919 ceramic Substances 0.000 claims abstract description 44
- 230000003068 static effect Effects 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A contactor contact arc extinguishing structure is provided with a ceramic cover, a plastic stop block, a switching frame and a bottom plate; the ceramic cover is positioned at the outer side of the plastic stop block, arc guide grooves are distributed at four corners of the plastic stop block, the switching frame is connected to the periphery of the bottom of the plastic stop block, the bottom of the ceramic cover contacts the top of the switching frame, and the bottom of the switching frame contacts the bottom plate; the ceramic cover is provided with a binding post outer hole, a binding post inner hole is arranged at the position of the plastic stop block corresponding to the binding post outer hole, a static binding post is connected between the binding post outer hole and the binding post inner hole, and a movable contact piece is arranged inside the plastic stop block; the arc generated between the movable contact piece and the static binding post is blown on the inner wall of the ceramic cover through the arc guiding groove. The utility model is provided with the plastic stop block, increases the creepage distance between the contacts and simultaneously gives up the position, so that the electric arc of the product which is connected and disconnected by the contactor with load is directly sprayed on the inner wall of the ceramic cover with high temperature resistance and good insulating property, the arc extinguishing capability is improved, and the contactor has reliable and stable work and stronger electric service life.
Description
Technical Field
The utility model relates to a contact arc extinguishing structure of a contactor, and belongs to the technical field of contactors.
Background
The contactor is a device capable of rapidly cutting off an alternating current and direct current main loop and frequently switching on and off a large current control (up to 800A) circuit, is often applied to a motor as a control object, and can also be used for controlling electric loads such as factory equipment, an electric heater, a working master machine, various electric power units and the like, and the contactor not only can switch on and off the circuit, but also has a low-voltage release protection effect.
Currently, in some types of contactors, arcing is often associated with the switching on and off of the contactor contacts. Most of traditional arc extinguishing modes adopt magnetic quenching and gas quenching, but the chamber does not adopt materials with strong arc resistance, a large amount of material is generated to ablate and collect carbon after the arc is sprayed on the inner wall of the chamber, the arc is difficult to extinguish, and interphase short circuit and contactor explosion are more likely to be caused seriously.
Disclosure of Invention
The utility model aims to provide a contact arc-extinguishing structure of a contactor, which solves the problems that the defects of arc-extinguishing design of the inner wall of a cavity of a traditional contactor are easy to cause interphase short circuit and explosion of the contactor.
The technical scheme for solving the technical problems is as follows: a contact arc extinguishing structure of a contactor comprises a ceramic cover, a plastic stop block, a switching frame and a bottom plate; the ceramic cover is positioned at the outer side of the plastic stop block, arc guide grooves are distributed at four corners of the plastic stop block, the switching frame is connected to the periphery of the bottom of the plastic stop block, the bottom of the ceramic cover contacts the top of the switching frame, and the bottom of the switching frame contacts the bottom plate;
the ceramic cover is provided with a binding post outer hole, a binding post inner hole is arranged at the position of the plastic stop block corresponding to the binding post outer hole, a static binding post is connected between the binding post outer hole and the binding post inner hole, and a movable contact piece is arranged inside the plastic stop block;
and an electric arc generated between the movable contact piece and the static binding post is blown on the inner wall of the ceramic cover through the electric arc guiding groove.
As the preferred scheme of contactor contact arc extinguishing structure, be equipped with the silica gel gasket between the terminal external orifice with the terminal hole, the silica gel gasket cover is in the periphery of static terminal.
As the preferable scheme of the contact arc extinguishing structure of the contactor, the bottom of the static binding post stretches into the inner side of the plastic stop block; the edge of the movable contact piece is symmetrically provided with a movable contact head, and the movable contact head is contacted with or disconnected from the bottom of the static binding post.
As the preferable scheme of contactor contact arc extinguishing structure, the movable contact piece disposes movable contact support, movable contact support's upper end is connected with the yoke iron sheet, movable contact piece is in the below of yoke iron sheet, movable contact piece's below is equipped with down yoke iron frame, the lower extreme of yoke iron frame is equipped with the contact spring down, the bottom of contact spring is equipped with insulating bush, insulating bush is fixed the upper end of bottom plate.
As the preferable scheme of the contact arc extinguishing structure of the contactor, the lower end of the bottom plate is provided with an iron core, a mandrel body is inserted in the iron core, and the upper end of the mandrel body is connected with the insulating bush;
the periphery of the core rod body is provided with a reset spring, and the lower part of the reset spring is positioned in a spring matching groove in the center of the iron core.
The utility model has the beneficial effects that the ceramic cover, the plastic stop block, the switching frame and the bottom plate are arranged; the ceramic cover is positioned at the outer side of the plastic stop block, arc guide grooves are distributed at four corners of the plastic stop block, the switching frame is connected to the periphery of the bottom of the plastic stop block, the bottom of the ceramic cover contacts the top of the switching frame, and the bottom of the switching frame contacts the bottom plate; the ceramic cover is provided with a binding post outer hole, a binding post inner hole is arranged at the position of the plastic stop block corresponding to the binding post outer hole, a static binding post is connected between the binding post outer hole and the binding post inner hole, and a movable contact piece is arranged inside the plastic stop block; the arc generated between the movable contact piece and the static binding post is blown on the inner wall of the ceramic cover through the arc guiding groove. The utility model is provided with the plastic stop block, increases the creepage distance between the contacts and simultaneously gives up the position, so that the electric arc of the product which is connected and disconnected by the contactor with load is directly sprayed on the inner wall of the ceramic cover with high temperature resistance and good insulating property, the arc extinguishing capability is improved, and the contactor has reliable and stable work and stronger electric service life.
Drawings
In order to more clearly illustrate the embodiments of the present utility model 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 will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the scope of the utility model.
Fig. 1 is a schematic diagram of the periphery of a ceramic cover of a contact arc extinguishing structure of a contactor according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of the periphery of a plastic stop block of a contact arc extinguishing structure of a contactor according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of the periphery of a contact arc extinguishing structure with a static binding post of a contactor according to an embodiment of the present utility model;
fig. 4 is a schematic cross-sectional view of a contact arc extinguishing structure of a contactor according to an embodiment of the present utility model.
In the figure, 1, a ceramic cover; 2. a plastic stopper; 3. a transfer frame; 4. a bottom plate; 5. an arc guiding groove; 6. an outer hole of the binding post; 7. an inner hole of the binding post; 8. a static binding post; 9. a movable contact piece; 10. a silica gel pad; 11. a movable contact bracket; 12. an upper yoke iron piece; 13. a lower yoke iron frame; 14. a contact spring; 15. an insulating bush; 16. an iron core; 17. a core body; 18. a return spring; 19. and a spring matching groove.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1, 2, 3 and 4, an embodiment of the present utility model provides a contact arc extinguishing structure of a contactor, which includes a ceramic cover 1, a plastic stop block 2, a switching frame 3 and a bottom plate 4; the ceramic cover 1 is positioned at the outer side of the plastic stop block 2, arc guide grooves 5 are distributed at four corners of the plastic stop block 2, the transfer frame 3 is connected to the periphery of the bottom of the plastic stop block 2, the bottom of the ceramic cover 1 contacts the top of the transfer frame 3, and the bottom of the transfer frame 3 contacts the bottom plate 4;
the ceramic cover 1 is provided with a binding post outer hole 6, a binding post inner hole 7 is arranged at the position of the plastic stop block 2 corresponding to the binding post outer hole 6, a static binding post 8 is connected between the binding post outer hole 6 and the binding post inner hole 7, and a movable contact piece 9 is arranged in the plastic stop block 2;
the arc generated between the movable contact piece 9 and the static post 8 is blown to the inner wall of the ceramic cover 1 through the arc guiding groove 5.
In this embodiment, a silica gel gasket 10 is disposed between the outer hole 6 of the binding post and the inner hole 7 of the binding post, and the silica gel gasket 10 is sleeved on the periphery of the static binding post 8; the bottom of the static binding post 8 extends into the inner side of the plastic stop block 2; the edges of the movable contact piece 9 are symmetrically provided with movable contacts, and the movable contacts are contacted with or disconnected from the bottom of the static binding post 8.
Specifically, in the assembly process, the top surface of the plastic stop block 2 is matched with the bottom surface of the ceramic cover 1 through the silica gel gasket 10, the bottom peripheral surface of the plastic stop block 2 is matched with the central inner side surface of the transfer frame 3, the bottom surface of the ceramic cover 1 is matched with the top surface of the transfer frame 3 in a contact manner, the bottom surface of the transfer frame 3 is matched with the top surface of the bottom plate 4 in a contact manner, meanwhile, the plastic stop block 2 is fixed inside the ceramic cover 1 by adopting laser welding, the ceramic cover 1 is fixed with an electromagnet assembly of a contactor, and the fixed limit of the plastic stop block 2 in the three-dimensional direction is integrally realized, so that the encapsulation of the movable contact piece 9 and the peripheral structure inside the plastic stop block 2 is completed.
When the contactor is broken with load, an electric arc is generated in the breaking process of the movable contact sheet 9, the electric arc is lengthened under the action of magnetic blowing, the electric arc is blown through the electric arc guiding groove 5 of the plastic stop block 2, and finally the electric arc is sprayed onto the inner wall of the ceramic cover 1 to be cooled and extinguished, so that the arc extinguishing effect is achieved; secondly, under the action of the high-temperature flame-retardant plastic stop block 2, the creepage distance between the contacts is increased, and the reliability and the electric life capacity of the contactor are improved.
In this embodiment, the movable contact piece 9 is configured with a movable contact bracket 11, an upper yoke piece 12 is connected to an upper end of the movable contact bracket 11, the movable contact piece 9 is located below the upper yoke piece 12, a lower yoke iron frame 13 is arranged below the movable contact piece 9, a contact spring 14 is arranged at a lower end of the lower yoke iron frame 13, an insulation bushing 15 is arranged at a bottom of the contact spring 14, and the insulation bushing 15 is fixed at an upper end of the bottom plate 4; an iron core 16 is arranged at the lower end of the bottom plate 4, a core rod body 17 is inserted in the iron core 16, and the upper end of the core rod body 17 is connected with the insulating bush 15; the periphery of the core rod body 17 is provided with a return spring 18, and the lower part of the return spring 18 is positioned in a spring matching groove 19 in the center of the iron core 16.
It should be noted that, in this embodiment, the inner movable contact piece 9 of the plastic stopper 2, the peripheral movable contact bracket 11, the upper yoke piece 12, the lower yoke frame 13, the contact spring 14, the insulation bushing 15, the iron core 16, the core rod body 17, the return spring 18, and the spring matching groove 19 belong to the existing design of the contactor, which is not the focus of the present technical solution, so that the principles of the present technical solution and the understanding of the present technical solution are shown, the disclosure of the inner structure of the contactor is not considered to be insufficient, and the applicant also discloses a related art patent application, such as a contactor with a shield limit, in detail, which is not repeated herein.
In summary, the utility model is provided with a ceramic cover 1, a plastic stop block 2, a switching frame 3 and a bottom plate 4; the ceramic cover 1 is positioned at the outer side of the plastic stop block 2, arc guide grooves 5 are distributed at four corners of the plastic stop block 2, the switching frame 3 is connected to the periphery of the bottom of the plastic stop block 2, the bottom of the ceramic cover 1 is contacted with the top of the switching frame 3, and the bottom of the switching frame 3 is contacted with the bottom plate 4; the ceramic cover 1 is provided with a binding post outer hole 6, a binding post inner hole 7 is arranged at the position of the plastic stop block 2 corresponding to the binding post outer hole 6, a static binding post 8 is connected between the binding post outer hole 6 and the binding post inner hole 7, and a movable contact piece 9 is arranged inside the plastic stop block 2; the arc generated between the movable contact piece 9 and the stationary post 8 is blown to the inner wall of the ceramic cap 1 through the arc guiding groove 5. In the assembly process, the top surface of the plastic stop block 2 is matched with the bottom surface of the ceramic cover 1 through the silica gel gasket 10, the bottom peripheral surface of the plastic stop block 2 is matched with the central inner side surface of the transfer frame 3, the bottom surface of the ceramic cover 1 is matched with the top surface of the transfer frame 3 in a contact manner, the bottom surface of the transfer frame 3 is matched with the top surface of the bottom plate 4 in a contact manner, meanwhile, the plastic stop block 2 is fixed inside the ceramic cover 1 by adopting laser welding, the ceramic cover 1 is fixed with an electromagnet assembly of a contactor, and the fixed limit of the plastic stop block 2 in the three-dimensional direction is realized integrally, so that the encapsulation of the movable contact piece 9 and the peripheral structure inside the plastic stop block 2 is completed. When the contactor is broken with load, an arc is generated in the breaking process of the movable contact sheet 9, the arc is lengthened under the action of magnetic blowing, the arc is blown through the arc guiding groove 5 of the plastic stop block 2, and finally the arc is sprayed onto the inner wall of the ceramic cover 1 to be cooled and extinguished, so that the arc extinguishing effect is achieved; secondly, under the action of the high-temperature flame-retardant plastic stop block 2, the creepage distance between the contacts is increased, and the reliability and the electric life capacity of the contactor are improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (5)
1. The contact arc extinguishing structure of the contactor is characterized by comprising a ceramic cover (1), a plastic stop block (2), a switching frame (3) and a bottom plate (4); the ceramic cover (1) is positioned at the outer side of the plastic stop block (2), arc guide grooves (5) are distributed at four corners of the plastic stop block (2), the transfer frame (3) is connected to the periphery of the bottom of the plastic stop block (2), the bottom of the ceramic cover (1) is contacted with the top of the transfer frame (3), and the bottom of the transfer frame (3) is contacted with the bottom plate (4);
the ceramic cover (1) is provided with a binding post outer hole (6), a binding post inner hole (7) is arranged at the position of the plastic stop block (2) corresponding to the binding post outer hole (6), a static binding post (8) is connected between the binding post outer hole (6) and the binding post inner hole (7), and a movable contact piece (9) is arranged in the plastic stop block (2);
an arc generated between the movable contact piece (9) and the static binding post (8) is blown on the inner wall of the ceramic cover (1) through the arc guiding groove (5).
2. The contact arc extinguishing structure of the contactor according to claim 1, wherein a silica gel gasket (10) is arranged between the outer hole (6) of the binding post and the inner hole (7) of the binding post, and the silica gel gasket (10) is sleeved on the periphery of the static binding post (8).
3. A contactor contact quenching structure according to claim 2, characterized in that the bottom of the static post (8) extends into the inside of the plastic stopper (2); the edges of the movable contact pieces (9) are symmetrically provided with movable contact heads, and the movable contact heads are contacted with or disconnected from the bottoms of the static binding posts (8).
4. A contactor contact arc extinguishing structure according to claim 3, characterized in that the movable contact piece (9) is configured with a movable contact bracket (11), an upper yoke piece (12) is connected to an upper end of the movable contact bracket (11), the movable contact piece (9) is located below the upper yoke piece (12), a lower yoke frame (13) is arranged below the movable contact piece (9), a contact spring (14) is arranged at a lower end of the lower yoke frame (13), an insulation bushing (15) is arranged at a bottom of the contact spring (14), and the insulation bushing (15) is fixed at an upper end of the bottom plate (4).
5. The contact arc extinguishing structure of the contactor according to claim 4, wherein an iron core (16) is arranged at the lower end of the bottom plate (4), a core rod body (17) is inserted in the iron core (16), and the upper end of the core rod body (17) is connected with the insulating bush (15);
the periphery of the core rod body (17) is provided with a return spring (18), and the lower part of the return spring (18) is positioned in a spring matching groove (19) in the center of the iron core (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321238806.5U CN219998123U (en) | 2023-05-20 | 2023-05-20 | Arc extinguishing structure of contactor contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321238806.5U CN219998123U (en) | 2023-05-20 | 2023-05-20 | Arc extinguishing structure of contactor contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219998123U true CN219998123U (en) | 2023-11-10 |
Family
ID=88608839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321238806.5U Active CN219998123U (en) | 2023-05-20 | 2023-05-20 | Arc extinguishing structure of contactor contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219998123U (en) |
-
2023
- 2023-05-20 CN CN202321238806.5U patent/CN219998123U/en active Active
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