CN2300181Y - Permanent single and three phase power knife switch - Google Patents
Permanent single and three phase power knife switch Download PDFInfo
- Publication number
- CN2300181Y CN2300181Y CN 97216876 CN97216876U CN2300181Y CN 2300181 Y CN2300181 Y CN 2300181Y CN 97216876 CN97216876 CN 97216876 CN 97216876 U CN97216876 U CN 97216876U CN 2300181 Y CN2300181 Y CN 2300181Y
- Authority
- CN
- China
- Prior art keywords
- support plate
- insulation
- contact
- sliding sleeve
- fixed
- 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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Abstract
The utility model relates to a knife switch for single phase and three phase power supplies, which can guarantee the safe operation. The contact of the knife switch adopts a bridge contact system, a moving contact is fixed under an insulating support plate which is supported by a spring, and the moving contact forms top and bottom correspondence with static contacts in a shape like a Chinese character 'pin'. A flat plate type permanent magnet is fixed on the insulating support plate, an insulating push and pull sliding sleeve (covers the insulating support plate) which can slide is installed on an insulating casing, and two permanent magnets with opposite polarities are fixed on the upper part in the push and pull sliding sleeve. The push and pull insulating sliding sleeve can make the permanent magnets on the upper part in the sliding sleeve and the permanent magnet on the insulating support plate generate sucking and repulsive action to ensure that the moving contact makes upward and downward action to turn on or cut off a power supply.
Description
The utility model relates to a kind of device of safety utilization of electric power, especially can guarantee the power knife switch of handling safety.
At present, known structure single, the three phase mains knife switch is to be combined by clipping fixed contact, cutter formula moving contact.The insulated handle that pulls cutter formula moving contact clamps dynamic and static contact or separately, thereby switches on or off power supply.But the cutter formula moving contact of general power knife switch all is to expose outside, operates careless slightly easy mistake and bumps the generation electric shock accidents, and the accident of electric arc burn staff, face also can take place sometimes.
The purpose of this utility model provides a kind of single, three phase mains knife switch, and it can not only send electricity, outage, and can guarantee that operating personnel do not get an electric shock and not by electric arc burn.
The purpose of this utility model is achieved in that in insulation crust, and two groups of planar contacts formula fixed contact longitudinal separations that connect power supply and load are arranged in outer casing bottom, and it is corresponding about " product " font that one group of double-contact bridge-type moving contact is with it; Moving contact is fixed in the above below the insulation support plate that is embedded with one flat plate formula permanent magnet, and the insulation support plate is supported by spring; The push-and-pull sliding sleeve that can slide is housed on the insulation crust, its inwall top is embedded with two blocks of opposite polarity flat permanent magnets that longitudinal separation is arranged, one polarity of front is opposite with the polarity of insulation on the support plate, one polarity of back is identical with it, (cut off the electricity supply) at ordinary times, push-and-pull slides over below (referring to vertical installation), permanent magnet (little gap is arranged) parallel to each other on a permanent magnet below sliding sleeve is interior and the support plate that insulate.When promoting the push-and-pull sliding sleeve and upwards slide, moving contact (by the insulation support plate) is promoted by the magnet of repulsion mutually, with fixed contact rapid closing, power connection, when drop-down push-and-pull sliding sleeve.The magnet that moving contact is attracted each other promotes, and separates with fixed contact rapidly, and power supply is cut off.
Owing to adopt such scheme, can when connecting and cutting off single, three phase mains, guarantee operator's personal safety, only adopt quiet, moving contact and permanent magnet in the whole device, simple in structure.
Below in conjunction with drawings and Examples the utility model is further proved.
Fig. 1 is the vertical section structural map of magneto list, three phase mains knife switch embodiment.
Fig. 2 is the left view of magneto list, three phase mains knife switch embodiment.
Fig. 3 is the front view of magneto list, three phase mains knife switch embodiment.
Fig. 4 is the upward view of magneto list, three phase mains knife switch embodiment.
Among the figure 3, fixed contact 4, spring 5, moving contact 9, insulation support plate 10,11 permanent magnets 12, push-and-pull sliding sleeve 13, permanent magnet (1, insulated chassis 2, wiring nut 6, fuse 7, protecgulum 8, lead-in wire 14, bonnet 15, chute)
In the embodiment shown in fig. 1, fixed contact 3 is fastened on the insulated chassis, spring 4 supports insulative support plates 9, and the contact of moving contact 5 is over against the contact of fixed contact 3; Permanent magnet 11 polarity are opposite with permanent magnet 10, and are identical with permanent magnet 13, for guaranteeing 13 pairs of permanent magnets 11 of permanent magnet enough repulsive force arranged, and should make the magnetic of this permanent magnet strong; Want accurately closely to be entrenched in the smooth dovetail groove as Fig. 2 insulation sliding sleeve shown in Figure 3, will guarantee that simultaneously the magnet of its inwall top and the magnet on the insulation support plate are not more than 1 mm clearance.
Claims (2)
1, a kind of magneto list, three phase mains knife switch, in insulation crust, fixed contact, moving contact longitudinal separation are arranged, it is characterized in that: dynamic and static contact adopts the bridge contact system, moving contact be fixed on the insulation support plate below, fix a block permanent magnet (covering the insulation support plate) above the insulation support plate, the push-and-pull sliding sleeve internal fixation that can slide on insulation crust has two blocks of permanent magnets.
2, magneto list according to claim 1, three phase mains knife switch, it is characterized in that: fixed contact adopts the planar contacts formula, be fixed on the insulation crust bottom, moving contact adopts the double-contact bridge-type, be fixed on below the insulation support plate that is being supported by spring, it is corresponding up and down that dynamic and static contact is " product " font; Fixing one flat plate formula permanent magnet above the insulation support plate, insulation push-and-pull sliding sleeve is housed on the insulation crust, its inwall top is embedded with two blocks of opposite polarity flat permanent magnets that longitudinal separation is arranged, the polarity of a permanent magnet of front is opposite with the permanent magnet of insulation on the support plate, and of back is identical with it.Insulation push-and-pull sliding sleeve covers the fixedly insulation support plate of moving contact, and can slide along the dovetail groove of insulation crust bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216876 CN2300181Y (en) | 1997-05-06 | 1997-05-06 | Permanent single and three phase power knife switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216876 CN2300181Y (en) | 1997-05-06 | 1997-05-06 | Permanent single and three phase power knife switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2300181Y true CN2300181Y (en) | 1998-12-09 |
Family
ID=33933657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97216876 Expired - Fee Related CN2300181Y (en) | 1997-05-06 | 1997-05-06 | Permanent single and three phase power knife switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2300181Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830067A (en) * | 2011-09-21 | 2012-12-19 | 艾康生物技术(杭州)有限公司 | Magnetic block lock structure, and using method and application thereof in biochemical analyzer |
| CN103354189A (en) * | 2013-05-30 | 2013-10-16 | 河南省电力公司信阳供电公司 | Knife switch protection cover |
-
1997
- 1997-05-06 CN CN 97216876 patent/CN2300181Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830067A (en) * | 2011-09-21 | 2012-12-19 | 艾康生物技术(杭州)有限公司 | Magnetic block lock structure, and using method and application thereof in biochemical analyzer |
| CN102830067B (en) * | 2011-09-21 | 2014-11-05 | 艾康生物技术(杭州)有限公司 | Magnetic block lock structure, and using method and application thereof in biochemical analyzer |
| CN103354189A (en) * | 2013-05-30 | 2013-10-16 | 河南省电力公司信阳供电公司 | Knife switch protection cover |
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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 |