CN2720595Y - Switch-contact arc-extiction device - Google Patents
Switch-contact arc-extiction device Download PDFInfo
- Publication number
- CN2720595Y CN2720595Y CN 200420060374 CN200420060374U CN2720595Y CN 2720595 Y CN2720595 Y CN 2720595Y CN 200420060374 CN200420060374 CN 200420060374 CN 200420060374 U CN200420060374 U CN 200420060374U CN 2720595 Y CN2720595 Y CN 2720595Y
- Authority
- CN
- China
- Prior art keywords
- switch
- contact
- arc
- permanent magnet
- contact arc
- 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.)
- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to an electric switch, in particular to a switch-contact arc-extinction device. The switch-contact arc-extinction device is provided with a permanent magnet on the back surface of a contact, and in particular that the permanent magnet is arranged on the back surface of a static contact. The switch-contact arc-extinction device is characterized in that the permanent magnet which is made into a pad is fixed on the back surface of the static contact, and a normally closed switch is provided. The switch-contact arc-extinction device has the advantages of simple structure, low cost and good effects of arc extinction, being applicable in particular to low-voltage electrical switch-contact arc extinction. The service life of the switch can be prolonged, and the speed and reliability of switching actions can be improved.
Description
Technical field
The utility model relates to electric switch, particularly the switch contact arc-control device.
Background technology
In low-voltage circuit, various switches, contactor use very general.The switch of prior art generally includes one or more groups switch contact, and wherein the contact with the actuating mechanism interlock is called moving contact, and corresponding with moving contact is fixed contact.The one side that the contact is in contact with one another is a contact-making surface.Fixed contact generally passes through rivet or screw on insulating base.Moving contact is by acting arm, spring and actuating mechanism interlock.Moment when the contact disconnects or connects, can produce electric arc between moving contact and the fixed contact.Because the operational environment of contactor exists air, moisture and other impurity inevitably, the electric arc between the contact makes impurity ionization, forms high-speed ion stream.The temperature of this ion flow is very high, and is serious to pitting of contact, shortened the useful life of switch.Simultaneously, the high temperature ion flow forms conductor between the contact, has prolonged the operate time of switch, and it is unreliable to make that switch disconnects.Higher at voltage, when electric current was big, situation was more serious.
The utility model content
Technical problem to be solved in the utility model is exactly the above-mentioned shortcoming at prior art, and a kind of switch contact arc-control device is provided.
The utility model solves its technical problem, and the technical scheme of employing is, the switch contact arc-control device, and the back side, described contact is provided with permanent magnet.
The beneficial effects of the utility model are, arc-control device is simple in structure, and is with low cost, and arc quenching effect is good.Prolong the useful life of switch, improved the speed and the reliability of switch motion.
Description of drawings
Fig. 1 is the partial sectional view of embodiment.
Among the figure: the 1-acting arm; The 11-moving contact; 2-stationary contact arm; The 21-fixed contact; The 22-permanent magnet; The 23-insulating base.
Embodiment
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
Switch contact arc-control device of the present utility model is on existing switch contact, and permanent magnet is set, and utilizes the effect in magnetic field to weaken or eliminates electric arc, thereby protect the contact not by arc erosion.For the electric conductivity of influencing contactor not, permanent magnet should be arranged on the noncontact face (back side) of contact.Permanent magnet is done slabbing (as pad), is fixed together by screw or rivet and contact contact arm, and be a kind of fairly simple fixing means.
Embodiment
Fig. 1 is the partial sectional view of JCZ5 type contactless contactor contact part, and this type switch is the three-phase normally closed switch.Permanent magnet 22 among the figure, adopt hard magnetic material to make pad, are fixed on the insulating base 23 with stationary contact arm 2, fixed contact 21, and its position is just in time at fixed contact 21 back sides.In the time of switch motion, acting arm 1 and moving contact 11 leave fixed contact 21 under the effect of actuating mechanism, and circuit is disconnected.The high-speed ion stream that produces between moving contact 11 and the fixed contact 21 is drawn diffusing, elongation under the effect in magnetic field, and cooling fast, and arc light reduces or complete obiteration.So both protected the contact not ablated, the electric action of ion flow between the contact is eliminated, the switch opening speed improves, and circuit turn-offs more reliable.
This routine permanent magnet is fixed on the back side of fixed contact, and is near with contact distance, can form stronger magnetic field near the contact, thereby improves arc quenching effect.Permanent magnet is made pad, is convenient to install, and the side of occupation of land not need not change the structure of switch.As can be seen from Figure 1, if the switch inner space allows, permanent magnet also can be arranged on the moving contact back side, even it is also passable at the moving contact back side and the fixed contact back side permanent magnet to be installed simultaneously.
Switch contact arc-control device of the present utility model is specially adapted to low-voltage electrical switch contact arc extinguishing.Under the same terms, can make the switch operating current improve 3～5 times.
Claims (4)
1. switch contact arc-control device, it is characterized in that: the back side, described contact is provided with permanent magnet.
2. switch contact arc-control device according to claim 1 is characterized in that: described switch is a normally closed switch.
3. switch contact arc-control device according to claim 1 and 2 is characterized in that: described permanent magnet is arranged on the fixed contact back side.
4. switch contact arc-control device according to claim 3 is characterized in that: described permanent magnet is made pad, is fixed on the fixed contact back side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060374 CN2720595Y (en) | 2004-07-22 | 2004-07-22 | Switch-contact arc-extiction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060374 CN2720595Y (en) | 2004-07-22 | 2004-07-22 | Switch-contact arc-extiction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720595Y true CN2720595Y (en) | 2005-08-24 |
Family
ID=35009550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420060374 Expired - Fee Related CN2720595Y (en) | 2004-07-22 | 2004-07-22 | Switch-contact arc-extiction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2720595Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817478A (en) * | 2017-11-22 | 2019-05-28 | 嘉灵科技有限公司 | Monopole DC breaker with two-way arc chamber |
-
2004
- 2004-07-22 CN CN 200420060374 patent/CN2720595Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817478A (en) * | 2017-11-22 | 2019-05-28 | 嘉灵科技有限公司 | Monopole DC breaker with two-way arc chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |