CN202523648U - Direct-operated type dual breakpoint contact structure of novel electromagnetic switching device - Google Patents
Direct-operated type dual breakpoint contact structure of novel electromagnetic switching device Download PDFInfo
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- CN202523648U CN202523648U CN2011205616581U CN201120561658U CN202523648U CN 202523648 U CN202523648 U CN 202523648U CN 2011205616581 U CN2011205616581 U CN 2011205616581U CN 201120561658 U CN201120561658 U CN 201120561658U CN 202523648 U CN202523648 U CN 202523648U
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- supporting piece
- arc
- switch
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Abstract
A direct-operated type dual breakpoint contact structure of a novel electromagnetic switching device is provided. The structure comprises an arc-extinguishing chamber, a static contact and a contact supporting piece, a contact spring movable contact bridge is sleeved inside the upper end of the contact supporting piece, the contact spring movable contact bridge is connected with the contact supporting piece through a contact spring and a contact bridge connecting piece, the contact spring is a compression spring, a supporting piece spring is arranged on the middle part of the contact supporting piece, a lower supporting piece is arranged on the lower end of the contact supporting piece, a counter-force spring is pressed against the top end of the lower supporting piece, the lower supporting piece is sleeved on the contact supporting piece, a supporting piece spring is arranged between the two supporting pieces, and the supporting piece spring is a compression spring. When a switch is switched on/off, the distance between the movable contact and the static contact reaches the movement stroke position and is greatly larger than a contact opening space (can increase 7mm maximally), the electrical gap is effectively increased, an electrical arc is elongated inside the arc-extinguishing chamber, rapid quenching of the electrical arc can be realized, and the breaking capacity of the switch can be increased.
Description
Technical field
The utility model relates to a kind of electromagnetic switch electrical equipment, particularly a kind of Direct Action Type double break contact structure of electromagnetic switch electrical equipment of large opening stroke.
Background technology
Device for switching mainly is used for connection, carrying and disjunction circuital current, and kind generally has control and protection switch electrical equipment, A.C. contactor etc.
Device for switching adopts the Electromagnetically-operating system usually; Contact system is generally the Direct Action Type double-breakpoint structure, contact closure during iron core adhesive action, contact disjunction when iron core discharges; Contact has only a position of rest; Contact or be in make position, or be in the disjunction position, contact moves to stop motion at once behind the disjunction position.The breaking capacity of contact system is an important performance indexes of device for switching normally.
Summary of the invention
Not enough to prior art, the utility model provides a kind of Direct Action Type double break contact structure of novel electromagnetic device for switching.Contact system adopts novel Direct Action Type double-breakpoint structure, and the movable contact bridge can move to stroke position (holding greater than contact when static apart from) when disjunction, and the spacing when having increased the dynamic/static contact disjunction effectively raises the breaking capacity of switch.
To achieve these goals, the technical scheme taked of the utility model is:
The Direct Action Type double break contact structure of novel electromagnetic device for switching comprises arc control device, fixed contact and contact supporter, and inside, contact supporter upper end is with touch spring movable contact bridge; Between touch spring movable contact bridge and the contact supporter through touch spring with touch the bridging fitting and be connected; Touch spring is the compression spring, and the middle part of contact supporter is provided with the strutting piece spring, and the lower end of contact supporter is provided with lower support element; There is reaction spring on the top, top of lower support element; Lower support element is sleeved on the contact supporter, and the strutting piece spring is housed between two strutting pieces, and the strutting piece spring is the compression spring.
The utility model switch is mainly used in and exchanges 50Hz or 60Hz, rated operational voltage 380V and following, rated operational current to the power circuit of 400A; Be used to circuit or motor control and protection are provided, be widely used in electric drive system, industrial automation control system, low voltage power distribution network etc.
The beneficial effect of the utility model: when switch moves in disjunction; The dynamic/static contact spacing reaches the action stroke position; Much larger than clearance between open contacts (maximum can increase 7mm), effectively increased electric clearance, in arc control device, elongated electric arc; Help extinguishing fast of electric arc, increased the breaking capacity of switch.
Description of drawings
The structural representation of Fig. 1, the utility model;
The vertical view of Fig. 2, the utility model;
Fig. 3-1, Fig. 3-2, Fig. 3-3 are respectively electromagnetic switch and are being closed into the state diagram of disjunction.
Embodiment
Shown in accompanying drawing, the major part of switch contact system has: movable contact bridge 1, fixed contact 2, contact supporter 3, lower support element 4, touch spring 5, strutting piece spring 6, correlated parts mainly contains: reaction spring 7, arc control device 8, touch bridging fitting 9 etc.
Between movable contact bridge 1 and the contact supporter 3 through touch spring 5 with touch bridging fitting 9 and be connected, touch spring 5 is the compression spring, in order to keep the pressure of contact contact.
Switch can be connected, the electric current of (overload condition that comprises regulation) under carrying and the disjunction normal condition in operating process, and can connect, carry at the appointed time and the non-normal condition of disjunction regulation under electric current (like short circuit current).
The contact system of switch mainly is made up of movable contact bridge, fixed contact, contact support, strutting piece, touch spring, strutting piece spring etc.
Switch is at closed position of rest; The movable contact bridge contacts transfixion with fixed contact; The contact support has certain overtravel; To guarantee that contact still can keep contacting reliably and having certain contact pressure, the energy that touch spring and reaction spring compressing storing necessarily have after electrical wear to a certain degree.
Switch is at the disjunction position of rest, and the contact transfixion maintains certain clearance (clearance between open contacts) between movable contact bridge and the fixed contact, and main effect has breaking arc and electric insulation to isolate.
Switch is at closed position of rest, and contact contacts transfixion, and size (a) is an overtravel, touch spring and reaction spring compression.See Fig. 3-1.
During switch disjunction action, the movable contact bridge separates with fixed contact fast, produces electric arc between contact; Electric arc is incorporated in the arc control device and extinguishes, and the movable contact bridge moves to maximum position, and size (b) is the action stroke; The lower support element length of spring compressed, the movable contact bridge begins to return subsequently, rests on the disjunction position of rest.See Fig. 3-2.
Switch is at the disjunction position of rest, the contact transfixion, and size (c) is a clearance between open contacts.See Fig. 3-3.
When switch moved in disjunction, action stroke (size b) was greater than clearance between open contacts (size c), and size (b-c) maximum can reach 7mm, has effectively increased electric clearance, in arc control device, has elongated electric arc, helps extinguish arcs.
During switch disjunction action, the movable contact bridge separates with fixed contact under the effect of reaction spring and electrodynamic repulsion force fast, produces electric arc between contact; Along with the increase of opening distance; Electric arc is incorporated in the arc control device and extinguishes, and the movable contact bridge moves to maximum position (action stroke), strutting piece length of spring compressed; The movable contact bridge begins to return subsequently, rests on the disjunction position of rest.
Annotate: when disjunction was moved, movable contact bridge and contact support etc. stored certain elastic potential energy in advance, and the shaped design of dynamic/static contact is the repulsion structure, and when big electric current passed through, producing between the dynamic/static contact had bigger electrodynamic repulsion force.The each motion of movable contact bridge possibly reach maximum position (maximum actuation stroke), also possibly not reach maximum position (action stroke), and this is relevant with actual electrodynamic repulsion force size.
This a kind of novel Direct Action Type double break point stroke structure also can be applied to other device for switching, for example: A.C. contactor etc.
Claims (1)
1. the Direct Action Type double break contact structure of novel electromagnetic device for switching; Comprise arc control device (8), fixed contact (2) and contact supporter (3), it is characterized in that inside, contact supporter (3) upper end is with touch spring movable contact bridge (1); Between touch spring movable contact bridge (1) and the contact supporter (3) through touch spring (5) with touch bridging fitting (9) and be connected; Touch spring (5) is the compression spring, and the middle part of contact supporter (3) is provided with strutting piece spring (6), and the lower end of contact supporter (3) is provided with lower support element (4); There is reaction spring (7) on the top, top of lower support element (4); Lower support element (4) is sleeved on the contact supporter (3), and strutting piece spring (6) is housed between two strutting pieces, and strutting piece spring (6) is the compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205616581U CN202523648U (en) | 2011-12-29 | 2011-12-29 | Direct-operated type dual breakpoint contact structure of novel electromagnetic switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205616581U CN202523648U (en) | 2011-12-29 | 2011-12-29 | Direct-operated type dual breakpoint contact structure of novel electromagnetic switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202523648U true CN202523648U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205616581U Expired - Fee Related CN202523648U (en) | 2011-12-29 | 2011-12-29 | Direct-operated type dual breakpoint contact structure of novel electromagnetic switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202523648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529207A (en) * | 2016-01-27 | 2016-04-27 | 华中科技大学 | Electromagnetic high-voltage isolation switch |
-
2011
- 2011-12-29 CN CN2011205616581U patent/CN202523648U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529207A (en) * | 2016-01-27 | 2016-04-27 | 华中科技大学 | Electromagnetic high-voltage isolation switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20121229 |