CN103337425A - Electromagnetic direct-drive protector - Google Patents
Electromagnetic direct-drive protector Download PDFInfo
- Publication number
- CN103337425A CN103337425A CN2013102234574A CN201310223457A CN103337425A CN 103337425 A CN103337425 A CN 103337425A CN 2013102234574 A CN2013102234574 A CN 2013102234574A CN 201310223457 A CN201310223457 A CN 201310223457A CN 103337425 A CN103337425 A CN 103337425A
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- push rod
- housing
- contact
- electromagnet
- axis hole
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Abstract
An electromagnetic direct-drive protector is provided. Electromagnets, a static contact, a push rod and a spring are arranged inside a shell; a moving contact is fixed at the upper end of the push rod; the lower end of the push rod is provided with magnets; a bimetallic strip is fixed at the lower end of the left-side outer wall of the shell; a contact is fixed at the upper end of the inner-side sheet of the bimetallic strip; and a contact which is corresponding to the above contact is fixed at an outer wall of the shell. When large current caused by short circuit appears in a circuit, the current passes through the bimetallic strip at first; a power source of an electromagnet at the right side of the shell is switched on; a magnetic force is utilized to drive the push rod, such that a main contact can be disconnected instantaneously; and a fault of the front end of a protected line can be eliminated, and therefore, the security of a system can be ensured.
Description
Technical field
The present invention relates to a kind of electric elements, specifically a kind of overcurrent protective device.
Background technology,
Common short-circuit protection; it mostly is electromagnetic type current-release device; with iron core as drive rod; but such that sensitivity is set is low; complex structure; easy to wear; cause after the wearing and tearing that snap close is tight and loosening, even skid and lose button that the main contacts snap close is tight and loosening just keeps away unavoidable generation electric arc; cause that the generation of burning the candle phenomenon is arranged; this not only directly influences the useful life of protector, but also can cause the malfunction of protector, if protector at work fastener system skid and can not in time thread off; can not in time cut off the electricity supply during short circuit in the circuit, may breed disaster so.
Summary of the invention
In order to remedy the above-mentioned deficiency of protector; the invention provides a kind of electromagnetic direct-drive protector; the method that the form of the employing bimetal leaf of this protector and permanent magnetism combine with electromagnetism; by the Electromagnetic Drive main contact; make the instantaneous disconnection of main contact energy; can excise the fault of protected circuit head end better, to guarantee the safety of system.
The present invention solves the technical measures that its technical problem takes, and electromagnet is established in the lower housing portion left and right sides, the corresponding installation of the electromagnet of the left and right sides, and the housing left upper portion is fixed contact fixedly; Axis hole is established in middle and upper part at housing, axis hole is opened at the middle part of push rod, push rod is by in the axis hole that is pivotally mounted in housing, the upper end of push rod arranges moving contact, establishes back cushion at the push rod at the moving contact back side, two blocks of magnet steel about install the lower end of push rod, the face tilt of the face of magnet steel and push rod during installation, when magnet steel and electromagnet in opposite directions near the time, the magnet steel face is relative with the facial plane of electromagnet, keeps the state of mutual adhesive by magnetic force magnet steel and electromagnet; Snak link is established on top at the push rod axis hole, and below push rod and axis hole vertical line, snak link is established in the bottom of housing, and one on spring hangs on the snak link on push rod top, and the other end of spring hangs on the snak link of housing bottom.The fixing bimetal leaf in the lower end of housing left side outer wall, the thermal coefficient of expansion of bimetal leaf outside a slice is bigger than inboard a slice, the upper end fixed contact of bimetal leaf inboard a slice, fixed contact on the corresponding housing outer wall position in this contact.When big electric current occurring because of short circuit in the circuit, this electric current at first passes through bimetal leaf, because the thermal coefficient of expansion of bimetal leaf outside a slice is bigger than inboard a slice, bimetal leaf moment is to the case side bending, the closing of contact in the contact of bimetal leaf and housing left side, the power supply of conducting housing right side electromagnet, electromagnet produces the magnetic field identical with magnet steel polarity immediately, simultaneously, the electromagnet in housing left side is also connected power supply, the opposite polarity magnetic field of magnet steel on its generation and the push rod, about two electromagnet produce the magnetic field that the magnet steel right side is pushed away the Zola simultaneously, at this moment the force of spring on push rod is along with the motion of push rod is mobile to the right, effect lower push-rod at magnetic force and spring force turns right around pivot, left side magnet steel moment is close to the electromagnet in housing left side, and maintenance attracts state mutually under the effect in magnetic field, lean against on the housing of right side up to the back cushion on the push rod and to end, but the magnet steel face does not contact and leaves the gap with the face of electromagnet, moving contact separates along with the motion of push rod simultaneously, cut off the electricity supply, at this moment two electromagnet power supplies cut off about, and electromagnet loss of excitation, moving contact rely on the magnetic force of spring force and magnet steel to be fixed on the position of opening a sluice gate.When protector need close a floodgate; the electromagnet in housing left side is connected power supply; electromagnet produces the magnetic field identical with magnet steel polarity immediately; when the electromagnet in housing left side is connected power supply; the electromagnet on housing right side is also connected power supply; the opposite polarity magnetic field of magnet steel on its generation and the push rod; right magnet steel moment is close to the electromagnet on housing right side on the effect lower push-rod of magnetic force; and under the effect in magnetic field, become adhesive situation; moving contact along with the motion of push rod moment closure; moving contact is connected power supply, at this moment about two electromagnet power supplies cut off the electromagnet loss of excitation; moving contact relies on the magnetic force of spring force and magnet steel to be fixed on the position of closing lock; and do not need to connect the maintenance power supply, but the magnet steel face does not contact and leaves the gap with the face of electromagnet, in order to avoid bump damages.Contactor does not need to keep electric current like this, has not only reduced the load of coil, coil is not generated heat or low-grade fever, and do not establish iron core, and is more energy-conservation, thereby reaches the security performance of raising contactor and the purpose of sensitivity.
The invention has the beneficial effects as follows, energy-conservation, safety, simple in structure.
Description of drawings
Be described further the present invention is bright below in conjunction with accompanying drawing.
Fig. 1 is a kind of structural representation of electromagnetic direct-drive protector.
Among the figure, 1. housing, 2. left electromagnet, 3. right electromagnet, 4. fixed contact, 5. push rod, 6. pivot, 7. moving contact, 8. back cushion, 9. left magnet steel, 10 right magnet steel, 11. snak links, 12. snak links, 13. springs, 14. bimetal leafs, 15. contacts, 16. contacts.
Embodiment
In Fig. 1, left electromagnet 2 and right electromagnet 3 are established in the left and right sides, housing 1 bottom, the corresponding installation of the electromagnet of the left and right sides, and the housing left upper portion is fixed contact 4 fixedly; Axis hole is established in middle and upper part at housing, axis hole is opened at the middle part of push rod 5, push rod is installed in the axis hole of housing by pivot 6, the upper end of push rod arranges moving contact, and 7 establish back cushion 8 at the push rod at the moving contact back side, and left magnet steel 9 and right magnet steel 10 are installed in the lower end of push rod, the face tilt of the face of magnet steel and push rod during installation, when magnet steel and electromagnet in opposite directions near the time, the magnet steel face is relative with the facial plane of electromagnet, keeps the state of mutual adhesive by magnetic force magnet steel and electromagnet; Establish snak link 11 on the top of push rod axis hole, below push rod and axis hole vertical line, snak link 12 is established in the bottom of housing, and 13 1 on spring hangs on the snak link on push rod top, and the other end of spring hangs on the snak link of housing bottom.The fixing bimetal leaf 14 in the lower end of housing left side outer wall, the thermal coefficient of expansion of bimetal leaf outside a slice is bigger than inboard a slice, the upper end fixed contact 15 of bimetal leaf inboard a slice, fixed contact 16 on the corresponding housing outer wall position in this contact.
Claims (1)
1. electromagnetic direct-drive protector, it is characterized in that: electromagnet is established in the lower housing portion left and right sides, the corresponding installation of the electromagnet of the left and right sides, the housing left upper portion is fixed contact fixedly; Axis hole is established in middle and upper part at housing, and axis hole is opened at the middle part of push rod, and push rod is by in the axis hole that is pivotally mounted in housing, the upper end of push rod arranges moving contact, push rod at the moving contact back side is established back cushion, two blocks of magnet steel about install the lower end of push rod, the face tilt of the face of magnet steel and push rod during installation; Snak link is established on top at the push rod axis hole, and below push rod and axis hole vertical line, snak link is established in the bottom of housing, and one on spring hangs on the snak link on push rod top, and the other end of spring hangs on the snak link of housing bottom; The fixing bimetal leaf in the lower end of housing left side outer wall, the thermal coefficient of expansion of bimetal leaf outside a slice is bigger than inboard a slice, the upper end fixed contact of bimetal leaf inboard a slice, fixed contact on the corresponding housing outer wall position in this contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102234574A CN103337425A (en) | 2013-05-28 | 2013-05-28 | Electromagnetic direct-drive protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102234574A CN103337425A (en) | 2013-05-28 | 2013-05-28 | Electromagnetic direct-drive protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103337425A true CN103337425A (en) | 2013-10-02 |
Family
ID=49245564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102234574A Pending CN103337425A (en) | 2013-05-28 | 2013-05-28 | Electromagnetic direct-drive protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103337425A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279008A (en) * | 1978-08-22 | 1981-07-14 | Picchia Walter Del | Relay |
| JPH01241727A (en) * | 1988-03-23 | 1989-09-26 | Mitsubishi Electric Corp | Circuit breaker |
| CN2074499U (en) * | 1990-02-24 | 1991-04-03 | 周世祥 | Automatic energy-saving relay contactor |
| CN1677602A (en) * | 2004-04-01 | 2005-10-05 | 施耐德电器工业公司 | Electric switching device, relay, socket and electric apparatuses comprising such a device |
| CN101170034A (en) * | 2007-11-27 | 2008-04-30 | Tcl低压电器(无锡)有限公司 | Small breaker |
| CN201946546U (en) * | 2010-11-25 | 2011-08-24 | 宁波方太厨具有限公司 | Switchgear |
| CN102324347A (en) * | 2011-06-09 | 2012-01-18 | 惠州电道科技有限公司 | Load control device of intelligent socket |
-
2013
- 2013-05-28 CN CN2013102234574A patent/CN103337425A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279008A (en) * | 1978-08-22 | 1981-07-14 | Picchia Walter Del | Relay |
| JPH01241727A (en) * | 1988-03-23 | 1989-09-26 | Mitsubishi Electric Corp | Circuit breaker |
| CN2074499U (en) * | 1990-02-24 | 1991-04-03 | 周世祥 | Automatic energy-saving relay contactor |
| CN1677602A (en) * | 2004-04-01 | 2005-10-05 | 施耐德电器工业公司 | Electric switching device, relay, socket and electric apparatuses comprising such a device |
| CN101170034A (en) * | 2007-11-27 | 2008-04-30 | Tcl低压电器(无锡)有限公司 | Small breaker |
| CN201946546U (en) * | 2010-11-25 | 2011-08-24 | 宁波方太厨具有限公司 | Switchgear |
| CN102324347A (en) * | 2011-06-09 | 2012-01-18 | 惠州电道科技有限公司 | Load control device of intelligent socket |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131002 |