CN1490837A

CN1490837A - Circuit breaker with magnetic mechanism and current controller and short circuit lock

Info

Publication number: CN1490837A
Application number: CNA03152849XA
Authority: CN
Inventors: 林作英
Original assignee: QUANWU ELECTRIC APPLIANCE SWITCH CO Ltd NANJING
Current assignee: QUANWU ELECTRIC APPLIANCE SWITCH CO Ltd NANJING
Priority date: 2003-08-28
Filing date: 2003-08-28
Publication date: 2004-04-21
Anticipated expiration: 2023-08-28
Also published as: CN1252773C

Abstract

The present invention relates to a breaker. A magnet mechanism is provided in its case, in which a permanent magnet is between two iron-core plates, the coil frames are respectively provided on the permanent magnet, around the coil frames are wound the varnished wires which receive the control from CPU, a moving copper is mounted in the lower end of a moving shaft of an automatic button on the case, between the permanent magnet of the magnet mechanism and the moving iron-core on the moving copper is provided a pure iron corresponding to the moving copper, main circuit wires are provided between the moving magnet and the static magnet, a shifting lever controls a locking lever to move up and down through a blocking piece, a CT is connected to the electronic circuit and a tripper. Said, the breaker can solve the failures of conventional breakers due to overload, short circuit, poor reliability and unadjustable overload current, having the advantages of simple structure, small volume, greatly decreased cost, saved power and convenient usage and maintenance.

Description

The circuit breaker of carrying magnetic mechanism and current controller and short circuit locking

Technical field

The present invention relates to a kind of appliance switch, particularly electric circuit breaker, contactor, relay.

Background technology

Before the present invention makes, what circuit breaker adopted is mechanical structure, promptly by realization circuit such as lever, transmission mechanism, tripping mechanism overload, short circuit appear, can automatic shutdown circuit when leaking electricity, owing to equate fault, manually stir handle again after eliminating fault, make circuit connect work once more.Like this, the mechanical structure bigger space, circuit breaker inside that partly accounted for, make the circuit breaker volume bigger all the time, cost is higher, and mechanical structure itself also brought many instabilities and be prone to the problem of fault, gives to use and maintenance has brought trouble, and the circuit breaker of mechanical structure is after having got rid of fault, can not resume work automatically, also need the staff to reset with hand circuit breaker is reworked, the mechanical structure circuit breaker can't carry out remote operation, monitoring.

After the short circuit current fault occurring, the as easy as rolling off a log Electrical Safety that causes user's secondary to close a floodgate, the back circuit breaker that closes a floodgate remains tape jam and starts, because short circuit current is big, the electric arc that breaker contact point produced is also very big, very easily causes actual bodily harm to the operator.

In addition, be to adopt bimetal leaf or the magnetic oil pipe protection element of going bail for to overload current protection, bimetal leaf is made with alloy material, certainly lead to heat during energising, power consumption, and fragile sheet metal, in natural environment, bimetal leaf is relatively more responsive again to temperature, and the temperature difference greatly then reliability is just poor; The accuracy of magnetic oil pipe, overload current can't be adjusted, complex manufacturing, and noise is big during work.

Summary of the invention

Purpose of the present invention just is to overcome above-mentioned defective, designs a kind of circuit breaker that has magnetic texure and current controller and energy short circuit locking.

Technical scheme of the present invention is: the circuit breaker of carrying magnetic mechanism and current controller and short circuit locking, active copper on the movable axis in the middle of automatic button or the switch handle and moving silver point are corresponding with the quiet silver point on the interior corresponding locational left fixed copper of housing, the right fixed copper, its major technique is characterised in that between left fixed copper, right fixed copper magnetic mechanism is set, in the middle of the magnetic mechanism is two blocks of iron core plates, in the middle of two blocks of iron core plates is permanent magnet, at two iron core plate arranged outside bobbins, around last enamelled wire, the enamelled wire circuit is connected with CPU respectively.

Another technical scheme of the present invention is: the circuit breaker of carrying magnetic mechanism and current controller and short circuit locking, left fixed copper in active copper on the movable axis in the middle of automatic button or the switch handle and moving silver point and the housing on the opposite position, quiet silver point on the right fixed copper is corresponding, its major technique is characterised in that permanent magnet is set below active copper, one pure iron is set above permanent magnet, pure iron, the lead polyphone is connected on into electrolytic copper, on the major loop of electric copper output, lead is below moving magnet, driving lever one end is on moving magnet active line position, the driving lever other end connects card, card one end connects the card back-moving spring, and the other end is connected with the movable axis contact.

Another technical scheme of the present invention is: the circuit breaker of carrying magnetic mechanism and current controller and short circuit locking, comprise release, electric current adjustment piece, its major technique is characterised in that the CT signal amplifies, adjusts sampling, preposition amplification, power amplification to taking off device through the shaping of electronic circuit, and CT, electronic circuit board are arranged in the housing.

Advantage of the present utility model and effect are that the circuit breaker volume dwindles greatly, compare with the circuit breaker of power with existing, volume-diminished a greater part of, structure is also simple, operation is reliable, automatic trip after overload, electric leakage, short circuit occurring and owing to equate fault, the state of promptly resuming work automatically after the elimination fault can be suitable for remote operation; Owing to there have not been many mechanical structures, also removed mechanical breakdown that mechanical structure itself easily brings etc., so also decline and easy to use greatly of cost; Because enamelled wire then cuts off the power supply and still keeps closing of power circuit breaker work behind the closing of power circuit breaker electricity, the energy consumption when then having saved the enamelled wire energising has been eliminated noise; Locking mechanism is after short trouble appears in circuit breaker, and limiting circuit breaker is detained again, and the operator can't be closed a floodgate, and guarantees not produce harm electric arc, has only the failure cause of elimination to close a floodgate; It is high-power that current control device keeps under equal volume, weight, guarantees reliable operation, adapts to wider difference variation.

Description of drawings

Fig. 1-magnetic mechanism principle schematic of the present invention.

The concrete structure schematic diagram of the magnetic mechanism among Fig. 2-Fig. 1.

Fig. 3-short circuit locking breaker structure principle schematic of the present invention.

Magnetic mechanism and pure iron structural representation among Fig. 4-Fig. 3.

Fig. 5-current controller principle schematic of the present invention.

Fig. 6-current controller working state figure of the present invention.

Fig. 7-current controller mounting structure figure of the present invention.

Embodiment

Embodiment 1:

As shown in Figure 1 and Figure 2, housing 3 outer going up are installed automatic button 1 (claiming switch handle again), in the middle of the automatic button 1 is movable axis 2, be with back-moving spring on it, movable axis 2 lower ends are in housing 3, movable axis 2 lower ends connect active copper 4, and moving silver point 9 is set respectively on the two ends of active copper 4 downward one sides, at the moving iron core piece 6 of middle-end connection of active copper 4 downward one sides; In housing 3, on the upper-lower position below active copper 4, corresponding with the moving silver point 9 at two ends on the active copper 4 is that 5, two quiet silver points 5 of quiet silver point connect civil powers by annealed copper wire 8 respectively; The centre is a magnetic mechanism 7, magnetic mechanism 7 is made up of iron core plate 7-1, bobbin 7-2, magnet 7-3, enamelled wire 7-4, two iron core plate 7-1 are pure iron, between two iron core plate 7-1 is permanent magnet 7-3, bobbin 7-2 is set respectively and centers on iron core plate 7-1 in two iron core plate 7-1 epimere outsides, bobbin 7-2 goes up around last enamelled wire 7-4; The control of cpu pcb 10 is accepted in the open and close of enamelled wire 7-4 circuit.

During work:

Before enamelled wire 7-4 did not switch on, permanent magnet 7-3 was because distance can't attract the moving iron core piece 6 on the active copper 4, and movable axis 2 is motionless, so automatic button 1 does not get off, quiet silver point 5 contacts that moving silver point 9 on the active copper 4 is not corresponding with upper-lower position, so the civil power access failure, circuit breaker is not worked;

Receive the instruction of CPU (cpu pcb 10) when the circuit of enamelled wire 7-4, connect the circuit of enamelled wire 7-4, enamelled wire 7-4 switch on (being assumed to be forward), iron core plate 7-1 then produces magnetic force, attract on the active copper 4 moving iron core piece 6 and by movable axis 2 overcome automatic button 1 upper reset spring pulling force and downwards, make moving silver point 9 contact with quiet silver point 5, the conducting civil power is an alternating current, circuit breaker work;

After the closing of power circuit breaker work, CPU sends instruction again, close the circuit of enamelled wire 7-4, make enamelled wire 7-4 no power, then iron core plate 7-1 loses magnetism, and can't hold moving iron core piece 6, but the back is approaching with permanent magnet 7-3 because moving iron core piece 6 gets off, then permanent magnet 7-3 holds moving iron core piece 6, and moving silver point 9 still contacts conducting with quiet silver point 5, and circuit breaker continues connection work;

When circuit breaker run into overload, short circuit, when leaking electricity, owing to equate fault, then CPU sends instruction, enamelled wire 7-4 circuit is connected, but what insert is the reverse electrical source opposite with original normal polarity, iron core plate 7-1 produces and previous opposite magnetic pole, offset the magnetic force of permanent magnet 7-3 to moving iron core piece 6, iron core piece 6 is not attracted, under the tension that resets of back-moving spring, movable axis 2 drive active coppers 4 and on the 6 upwards trippings of iron core piece, moving silver point 9 disengages with quiet silver point 5, disconnected lock, and circuit breaker is not worked;

After overcoming or repairing fault, when needing circuit breaker to work on, then repeat above-mentioned steps.

Can know that from the above mentioned the present invention can carry out Long-distance Control, operation to circuit breaker.

Embodiment 2:

As shown in Figure 3, Figure 4:

Be in tripped condition this moment, active copper 4 is in the top, moving silver point 9 on the two ends, its underpart disengages with quiet silver point 5, therefore be cut off through pure iron 22, quiet silver point 5, moving silver point 9, major loop lead 16 to the circuit of electric copper output 24 from going into electrolytic copper 23, service interruption, circuit breaker is not worked, and is in tripped condition;

During normal operation of circuit breaker, locking bar 17 is resetted downwards, when the breach on it 20 arrives card 12 positions, card 12 sticks into breach 12 under spring 13 effects, owing to card 12 is fixedlyed connected with an end of driving lever 11, and pivot point (on circuit breaker) is arranged in the driving lever 11, therefore driving lever 11 other ends clockwise rotate, moving magnet 14 is allocated to dotted line position among the figure, and moving magnet 14 separates with static magnet 15, does not attract mutually; At this moment, another mistake hour hands swing handle 21, make switch main body 19 downward, active copper 4 is downward, two moving silver points 9 on the two ends, its underpart contact with following two quiet silver points 5 respectively, make into the major loop conducting of electrolytic copper 23, pure iron 22, quiet silver point 5, moving silver point 9, major loop lead 16, circuit breaker work to electric copper output 24; At this moment, handle 21 homings, but the permanent magnet 7-3 in the magnetic mechanism 7 has attracted the middle moving iron core piece 6 in active copper 4 bottoms, makes moving silver point 9 contact conducting all the time with quiet silver point 6; Pure iron 22 can produce certain magnetic force when normal operation of circuit breaker, but since during operate as normal electric current be not very big, and considered in advance and designed the size and the position of pure iron 22, so its magnetic force can be ignored; The magnetic force that major loop lead 16 is produced can be to moving magnet 14 generation effects yet;

When short circuit occurring in the major loop, very big electric current appears in the major loop, pure iron 22 is between the moving iron core piece 6 on magnetic mechanism 7 internal permanent magnet 7-3 and the moving centre, copper 4 bottom of words, it is the short trouble anti-magnetic that pure iron 22 produces huge magnetic force, offset permanent magnet 7-3 and attracted the magnetic force that moves iron core piece 6, then switch main body 19 upwards flicks under action of reset spring, drive active copper 4 and on moving silver point 9 break away from and the contacting of quiet silver point 5, cause major loop to disconnect, circuit breaker is not worked, major loop lead 16 produces big magnetic force simultaneously, moving magnet 14 is attracted on the solid line position from dotted line position,, driving lever 11 is dialled commentaries on classics clockwise with static magnet 15 adhesives, then withdraw from the breach 20 of card 12 from locking bar 17 that driving lever 11 other ends connect, locking bar 17 pops up under tension spring 18 effects.

Embodiment 3:

As Fig. 5, shown in Figure 6:

CT is as induction by current device 25, the signal that induction is obtained exports the shaping of electronic circuit 26 to and amplifies, adjusts sampling, preposition amplification, power amplification, output is connected to release 27, and the rectifying and wave-filtering of induction by current device 25 outputs is connected to the each several part of above-mentioned electronic circuit 26 respectively.

As shown in Figure 7:

Be that circuit board and induction by current device 25 with electronic circuit 26 designs and produces in a housing, electric current is adjusted piece 28 and is used for adjusting induction overload current numerical value.

During operate as normal, the electric current nonoverload; When current overload; induction by current device 25 is that CT senses overload current from the electric wire of major loop through wires hole 29; be about to signal and deliver to electronic circuit 26; amplify, adjust sampling, preposition amplification, power amplification through shaping; output is connected to release 27; release 27 is threaded off, and cuts off the electric current in the electric wire, and the protection electric equipment is not damaged.

Each several part structure of the present invention all is the various faults that run in the circuit breaker work in order to eliminate, and comprises overload, short circuit etc.

Claims

Carrying magnetic mechanism and current controller and short circuit the locking circuit breaker, left fixed copper on active copper on the movable axis in the middle of automatic button or the switch handle and moving silver point and the interior opposite position of housing, the quiet silver point on the right fixed copper are corresponding, it is characterized in that between left fixed copper, right fixed copper, magnetic mechanism being set, in the middle of the magnetic mechanism is two blocks of iron core plates, in the middle of two blocks of iron core plates is permanent magnet, at two iron core plate arranged outside bobbins, around last enamelled wire, the enamelled wire circuit is connected with CPU respectively.
Carrying magnetic mechanism and current controller and short circuit the locking circuit breaker, left fixed copper in active copper on the movable axis in the middle of automatic button or the switch handle and moving silver point and the housing on the opposite position, quiet silver point on the right fixed copper is corresponding, it is characterized in that below active copper, being provided with permanent magnet, one pure iron is set above permanent magnet, pure iron, the lead polyphone is connected on into electrolytic copper, on the major loop of electric copper output, lead is below moving magnet, driving lever one end is on moving magnet active line position, the driving lever other end connects card, card one end connects the card back-moving spring, and the other end is connected with the movable axis contact.
Carrying magnetic mechanism and current controller and short circuit the locking circuit breaker, comprise release, electric current adjustment piece, it is characterized in that the CT signal amplifies, adjusts sampling, preposition amplification, power amplification to taking off device through the shaping of electronic circuit, CT, electronic circuit board are arranged in the housing.
4. the circuit breaker of carrying magnetic mechanism according to claim 1 and current controller and short circuit locking is characterized in that connecting on the active copper a moving iron core piece.