CN106356805A - Method for endowing shortcircuit burning self-cut-off device with air switch hot stripping function - Google Patents

Abstract

The invention provides a method for endowing a shortcircuit burning self-cut-off device with an air switch hot stripping function. The method is implemented by a continuous explosion type shortcircuit signal extraction circuit capable of working only through combination with a residual-current circuit breaker, capacity of a filter capacitor in the circuit is set according to a circuit overload protection current value, when current in the continuous explosion type shortcircuit signal extraction circuit becomes overflowing current due to overload of the filter capacitor, pulse current is enabled to pass through an electronic switch, an anti-interference time-delay circuit and an AND gate circuit through optocouplers, and then a leakage protector is enabled to trip out by the aid of a driving amplifier, so that the device having a shortcircuit burning self-cut-off function originally is endowed with a function of an overload circuit breaker and avoids the situation that a bimetallic strip hot stripping mechanism after hot stripping is powered on only when a bimetallic strip is reset. An element structure of the overload circuit breaker is also necessary for the shortcircuit burning self-cut-off device, so that after an originally single-function product is endowed with dual functions, the cost is not increased. Therefore, the market competitiveness of the product is improved.

Description

Short circuit is burnt device of autotomying and is doubled as the method that air switch heat is threaded off

Technical field

The invention belongs to fire-fighting domain, especially relate to a kind of short circuit and burn device of autotomying as air switch heat dropout Method.

Background technology

A kind of my patent of invention " extracting method of explosion-continuousshort short circuit signal " patent No. 201310225953.3, this is special Profit referred to as " device of autotomying is burnt in short circuit ", it be a kind of must and RCCB cooperation after could be to electric wire small current short circuit fire Burn the patented product of preventive effect, but most people did not experience electricity baked wheaten cake personally, cannot embody its anti-electric baked wheaten cake at ordinary times again It is worth, so market sale is undesirable, if product function can be expanded, make this product also can carry, to user, the side of having some at ordinary times Just, and cost can not be increased, then be beneficial to increase this product sales volume, in the larger context for prevent electricity burn make tribute Offer.Realize this kind of target, be necessary for, using product intrinsic advantage, scientifically combining with other practicality electrical equipment, especially existing Product binding site is found in the RCCB using cooperatively with it.Household leak breaker all carries having air switch at present, and Air switch includes the short switch that can trip during a high current short circuit and a thermal tripping mechanism that can bend after being heated, Because thermal tripping mechanism is the foil gauge made with bimetal leaf, after circuit overload, foil gauge bends power-off, but after circuit power-off Lock can not be pushed away at once, and a period of time of will waiting, treat that foil gauge restores, after failture evacuation, just can push away electricity on lock.Due to overcurrent Form the situation of thermal tripping mechanism action more typically, if the design that can make full use of " device of autotomying is burnt in short circuit " product is special Levy, without adding production cost, will need after original power-off to go up the thermal tripping mechanism of electricity after a while, and be changed to event after power-off Barrier exclusion can go up the overcurrent protection mechanism of the other forms of electricity, then people not only can be able to prevent fires experiencing patented product, And also can bring convenience to electricity consumption at ordinary times, also save original bimetal leaf tripping mechanism, so this will be helpful to " open circuit Baked wheaten cake is autotomyed device " sale of product.And it is necessary to select to combine with this product in the overcurrent protection mechanism of other forms That, only in this way just can give full play to the advantage of this product, change same money, but can become simple function into multi-functional product Product.

Content of the invention

The purpose of the present invention is: releases a kind of short circuit baked wheaten cake and autotomys device come de- as RCCB bimetal leaf heat The method of button.

The object of the present invention is achieved like this: it includes a RCCB without thermal tripping mechanism, a company Quick-fried type short circuit signal extracts circuit, and the primary that explosion-continuousshort short circuit signal extracts the current transformer in circuit is electricity consumption power line, Secondary connects full-wave rectifying circuit, connects definite value filter capacitor after full-wave rectifying circuit, and definite value filter capacitor two terminates quick-fried point The primary coil of pulse induction transformator, the capacitance of definite value filter capacitor be set according to overload protection current value it is impossible to Flat " overflowing electric current " impulse wave is filtered by " definite value filter capacitor " and passes through quick-fried pulse induction transformator, quick-fried pulse induction becomes The secondary coil of depressor is connected to time filter capacitor, secondary filter capacitor a pair of optocoupler of parallel connection, the output termination positive pulse of photoelectric coupled circuit Amplifier audion and negative pulse amplifier audion, the colelctor electrode of two audions connects positive and negative pulse and gate circuit respectively With two inputs of door, one of input has and delays capacitor, and the outfan of positive negative pulse stuffing and door removes and connects multiple-pulse triggering Outside gate circuit, connect bistable state monolateral triggering electrical switch also by positive output pulse-triggered line, cause script to be output as negative Cut the anti-interference delay circuit of up-to-date style to start, after treating time delay, multiple-pulse triggering is connect with gate circuit and cuts the anti-interference delay circuit of up-to-date style Input just become by negative, now as positive negative pulse stuffing and gate circuit again pulse occurs when, multiple-pulse triggering is defeated with gate circuit Go out positive current, positive electricity makes phase, the ground short circuit actuating of relay after flowing through driving amplifier, phase, ground short circuit electric current make RCCB Tripping operation, thus also carry out open circuit protection to current in wire overload taking precautions against while small current short circuit is burnt；And it is anti-dry to cut up-to-date style Disturb delay circuit and also trigger periodic anti-interference delay circuit while sending trigger pulse to multiple-pulse triggering with gate circuit, After time delay, bistable state monolateral triggering electrical switch obtains the electricity making its output end voltage restore from negative output pulse-triggered line Pulse, causes bistable state monolateral triggering electrical switch to enter the new pulse period after reaching time delay again；It is characterized in that: replace heat de- The overcurrent protection circuit of buckle mechanism is to extract circuit to complete by explosion-continuousshort short circuit signal.

So, pass through all wave rectification after 50 hertz of AC signal that primary winding of mutual inductor obtains from electricity consumption line load； And the electric current after all wave rectification remains fluctuation, therefore in circuit again will be flat for ripple filter with wave filter, become after filtering DC signal can not pass through quick-fried pulse induction transformator again；Wave filter by quick-fried pulse induction transformator primary electrical impedance and Filter capacitor forms, and therefore selects suitable filter capacitor, and sets time filtered electrical in quick-fried pulse induction transformer secondary output Hold and carry out fine tuning, make filtering amount meet overcurrent value (definite value), 1.3 times of the typically optional rated current of its definite value；This line-transect Road, once transshipping, will can not be put down by " definite value filter capacitor " filter because of electric current within a very short time, and produce and put because of capacitor " the overflowing electric current " overflowed under, is somebody's turn to do the light sensitive diode that " overflowing electric current " just ignites in positive negative pulse stuffing optical coupling isolation circuit, Because optocoupler is a pair, they all can amplify to the positive negative pulse stuffing of " overflowing electric current ", and " overflowing electric current " signal inputs after amplifying To positive and negative pulse and gate circuit and two inputs of door, delay capacitor due to having with least one input of door, therefore energy Positive and negative pulse is made to export positive pulse with door moment；This positive pulse passes through bistable state monolateral triggering electrical switch, so that section up-to-date style is resisted dry Disturb delay circuit obtain electric after trigger, in delay number (time when cutting), due to cut up-to-date style delay circuit can not to its The multiple-pulse triggering connecting and the defeated malleation with one input pin of door of gate circuit, and make it keep original negative pressure state, therefore this Even if when positive negative pulse stuffing and gate circuit to multiple-pulse triggering and gate circuit the defeated malleation with another input pin of door, multiple-pulse with Gate circuit there will not be output；Because the circuit of device of autotomying is burnt in former short circuit, have now the hot tripping function of air switch concurrently, because Time length when this section be according to household electrical appliance starting current duration depending on, household electrical appliance generally 0.5 second.And due to The presence of the anti-interference delay circuit of periodic, so that disturbing pulse signal number is produced only in the same cycle could be in multiple-pulse Make accumulative (only calculating as the 1st time in the pulse in the period that cuts of 0.5 second) in triggering and gate circuit, and reach setting accumulative total 2 times Or when 3 times, multiple-pulse and gate circuit have output, can reach anti-interference requirement general 2 times, such as can also in strong jamming place With 3 times, (when high current short circuit produces, circuit can be cut off by short-circuit magnetoelectricity switch in RCCB immediately, is not therefore subject to Pulse number affects)；This circuit also replaces falling original low pulse obstruction device with optocoupler, and by quick-fried pulse induction transformator Secondary two coils from former patent circuit are changed into one, so neither increase cost, also reduce circuit volume, meet institute The bulk needing, circuit simplifies, reliability is strengthened, and this kind of design is that the short-circuit device institute of autotomying that burns is necessary, is accurate again It is equipped with above-mentioned fixed filters and create indispensable condition；And the overcurrent protection mechanism of existing other forms, due to It is not to be realized using existing apparatus in product, so cost up, often affect product competitiveness, even if so technical feasibility, Also not frequently with.And the overcurrent protection mechanism combining with this patent, due to being to extract circuit using explosion-continuousshort short circuit signal To realize, thus without increasing cost, only can increase the competitiveness of product.Observed according to me and relevant report display, little electricity Flow short-circuit be repeatedly touch electric wire after fire just can be on fire, electric wire itself also has certain anti-flammability, therefore generation small current touches fire, at two seconds If can be by dump in clock, electric wire can cool down immediately, and baked wheaten cake would not be formed, and finds that small current open circuit is drawn to people at ordinary times Lock for up to several minutes, or even nobody operates a switch, therefore can form electricity baked wheaten cake.

Brief description

Fig. 1 is that the block diagram that device of autotomying doubles as air switch heat dropout is burnt in short circuit.

Fig. 2 is the circuit fundamental diagram of the present invention.

Specific embodiment

In Fig. 11 is power supply, and 2 is the RCCB threaded off without heat, and 3 is current transformer, and 4 is load, and 5 is complete Ripple commutator, 6 is definite value filter capacitor, and 7 is quick-fried pulse induction transformator, and 8 is time filter capacitor, and 9 is optical coupling isolation circuit, 10 is positive and negative pulse amplifier, and 11 is positive negative pulse stuffing and gate circuit, and 12 is bistable state monolateral triggering electrical switch, 13 be cut when Formula anti-jamming circuit, 14 is multiple-pulse triggering and gate circuit, and 15 is the anti-interference delay circuit of periodic, and 16 is driving amplifier, 17 is mutually and terra short relay.3,5,6,7,8,9,10,11,12,13,14 above-mentioned each part composition explosion-continuousshort short circuit signal are extracted Circuit.Power supply 1 in Fig. 1 is to connect load 4, current transformer by RCCB 2 summation current transformer 3 threaded off without heat The AC signal electric current of load 4 is carried out rectification through full wave rectifier 5 by 3, but is filtered by definite value filter capacitor 6, due to The capacitance of definite value filter capacitor 6 is formulated according to overcurrent value, exceedes this current value electric capacity and just produces and overflows Electric current, so current overload or short circuit all can produce overflows electric current, overflows electric current after quick-fried pulse induction transformator 7, secondary Filter again in filter capacitor 8, due to filter capacitor 8 amount very little again, therefore overflow electric current and will be entered by optical coupling isolation circuit 9 The positive and negative pulse signal overflowing electric current is amplified by positive negative pulse stuffing amplifier 10, thus triggering positive negative pulse stuffing and gate circuit 11, positive and negative Pulse is connected with an input with door in gate circuit 14 with gate circuit 11 and multiple-pulse triggering, but because this is another with door Individual input is connected with cutting the anti-interference delay circuit of up-to-date style, and now delay time does not arrive, and is the negative pressure of normality, therefore multiple-pulse triggering At this moment do not have output with gate circuit 14；Positive negative pulse stuffing and gate circuit 11 are by positive output pulse-triggered line as can be seen from Fig. 1 Connect bistable state monolateral triggering electrical switch 12 so that bistable state monolateral triggering electrical switch 12 exports malleation, thus when startup cuts The anti-interference delay circuit of formula 13 works, and so that its output voltage is just become by negative after time delay, then cuts up-to-date style anti-interference time delay electricity Road 13 is i.e. to the defeated malleation with another input of door in the multiple-pulse triggering and gate circuit 14 connecting with it；If 0.5 second Inside overflow electric current to stop, then illustrate that the electric current that overflows just now is starting current or other interference electric current, if overcurrent or Explosion-continuousshort short circuit signal electric current, then overflow electric current after spending 0.5 second and also may proceed to, now due in multiple-pulse triggering and gate circuit 14 Just become due to cutting the anti-interference voltage of up-to-date style with an input of door, therefore the pulse coming with gate circuit 11 from positive negative pulse stuffing again When electric current reaches another input, multiple-pulse triggering just can be made to have output current with gate circuit 14, this output current delivers to drive Be amplified in dynamic amplifier 16, after amplification, electric current makes mutually and terra short relay 17 action, then between phase ground wire produce make without The electric current of the RCCB tripping operation that heat is threaded off.Cut up-to-date style anti-jamming circuit 13 also exporting to multiple-pulse triggering with gate circuit 14 While malleation, also the triggering anti-interference delay circuit of periodic 15 is so as to time (the about 4 seconds) periodic of time delay a cycle resists The outfan of interference delay circuit 15 is just become by negative, and positive voltage makes bistable state monolateral triggering electronics by negative output pulse-triggered line Negative value is replied in the output of switch 12.

Fig. 2 is the circuit fundamental diagram of the present invention.In figure ch be without thermal tripping mechanism RCCB, a table Show the phase line of exchange 220v power supply, arrow represents that during electricity consumption, wire leads to load direction, and b1 is current transformer, l1, l2 are respectively It is primary coil and the secondary coil of current transformer, d1, d2, d3, d4 are four diodes of full-wave rectifying circuit, c1 is fixed Value filtering capacitor, b2 is quick-fried pulse induction transformator, and l3, l4 are primary coil and the secondary of quick-fried Pulse induction device respectively Coil, r1 is current-limiting resistance, and g1, g2 are two optocouplers (as 521) of photoelectric isolating circuit, and c2 is connected on the secondary filter of optocoupler input Ripple capacitor, bis- amplifying triodes of bg1 and bg2, their colelctor electrode connects two input pins with door y1, and r2, r3 are and door Earth resistance, also delays capacitor c3 on a foot, with door y1 outfan have parallel with one another three diode d5, d7, D11, w1, w2 are the electrical switches of the monolateral triggering of two bistable states, s1, s2, are as cutting the anti-interference delay circuit of up-to-date style and a week The anti-interference delay circuit of phase formula and exist, s3 is three supporting with w2 delay circuit, and the delay pattern of three circuit is all Outfan is made just to be become by negative after time delay for a period of time after input receives positive voltage again.D6, d9, d10 are isolating diodes, Y2, y3 are and gate circuit that r5 is the resistance limiting phase current, and c4 is the shunt capacitance of dry-reed relay p, and bg3 is drive amplification Device audion, k is permutator, in figure "+" be DC supply positive pole, a is phase line.Its operation principle is: works as electricity When flowing through load or wire short-circuiting, definite value filter capacitor c1, produce and overflow electric current, this electric current passes through quick-fried pulse induction transformator After b2, current-limiting resistance r1 through optocoupler and time filter capacitor c2 filter again, the short circuit pulse electric wave remaining or 50 hertz of exchange Overflow the electric current (therefore two optocouplers should connect relatively) that electric current produces positive and negative two directions in optocoupler g1, g2, this electric current makes audion Bg1 and bg2 turns on, and due to delaying the presence of capacitor c3, two inputs with door y1, are just all instantaneously, therefore the output of y1 End has positive pulse electric current to export；Output current makes the output of bistable state monolateral triggering electrical switch w1 by negative change via diode d5 Just, when cutting, anti-interference delay circuit s1 obtains time delay after malleation from w1 outfan and exports malleation to door y2 again after 0.5 second, is prolonging When 0.5 second time in, no matter the pulse of overflow electric current is strong, often, due to the outfan of anti-interference delay circuit s1 when cutting At this moment be negative pressure, do not have output with door y2, after delay time arrives, s1 is changed into positive output from original negative output, therefore with Door y2 right crus of diaphragm obtains malleation, after time delay in 0.5 second, such as have again current impulse from door y1 output (this pulse we be referred to as the Two pulses), the second pulse, after diode d7, is made also to obtain malleation with the left side input of door y2, is then just output as with door y2 Pressure.The malleation converted switch k of output reaches the base stage of bg3 audion, triode ON, has electric current in the coil of tongue tube p, By normally opened to adhesive, phase line a electric current is grounded the reed of tongue tube through resistance r5, then RCCB tripping operation.Definite value filtered electrical Container c1 and time filter capacitor c2 adjusts in 1.3 times about rated current, RCCB tripping operation, institute when exceeding this current value With original " device of autotomying is burnt in short circuit ", now again can be as the thermal tripping mechanism in RCCB.Anti- in order to improve further Interference, has therefore specially been equipped with periodic anti-interference delay circuit s2, when it is from a section up-to-date style anti-interference delay circuit s1 output End just triggered signal electricity after, time delay 4 seconds about it send a malleation to bistable state monolateral triggering electrical switch w1, The outfan that w1 connects s1 recovers original negative voltage, and a foot with door y2 is just negative electricity, therefore just bears with door y2 outfan Electricity.As when at this moment y1 has pulse signal electric current again, made to turn on door y2, and the whole working cycle must start over, Which improves the anti-interference of circuit.In order to capacity of resisting disturbance is higher, permutator k can be gone to left side contact, this Sample electrical switch w2 through the monolateral triggering of diode d8 second bistable state of connection with door y2 output, w2 outfan connects time delay electricity again Road s3, makes an input pin with door y3 just be after time delay, must be when the 3rd pulse arrives so in the same cycle Just open with door y3, output current reaches driving transistor base, after triode ON, tongue tube p work after d10 diode Make, so that RCCB is tripped.

Claims (1)

1. short circuit is burnt device of autotomying and is doubled as the method that air switch heat is threaded off, and it includes an electric leakage without thermal tripping mechanism Chopper, an explosion-continuousshort short circuit signal extracts circuit, and explosion-continuousshort short circuit signal extracts the primary of the current transformer in circuit It is electricity consumption power line, secondary connects full-wave rectifying circuit, after full-wave rectifying circuit, connect definite value filter capacitor, definite value filter capacitor Device two terminates the primary coil of quick-fried pulse induction transformator, and the capacitance of definite value filter capacitor is according to overload protection current value And set it is impossible to flat " overflowing electric current " impulse wave be filtered by " definite value filter capacitor " pass through quick-fried pulse induction transformator, quick-fried The secondary coil of point pulse induction transformator is connected to time filter capacitor, secondary filter capacitor a pair of optocoupler of parallel connection, photoelectric coupled circuit defeated Go out to terminate positive pulse amplifier audion and negative pulse amplifier audion, the colelctor electrode of two audions connects positive and negative arteries and veins respectively Punching and gate circuit and two inputs of door, one of input has and delays capacitor, and positive negative pulse stuffing is removed with the outfan of door Connect outside multiple-pulse triggering and gate circuit, connect bistable state monolateral triggering electrical switch also by positive output pulse-triggered line, cause former Originally it is output as the negative anti-interference delay circuit of up-to-date style that cuts to start, after treating time delay, multiple-pulse triggering and gate circuit connect section up-to-date style and resist The input of interference delay circuit just becomes by negative, and when now such as positive negative pulse stuffing and gate circuit pulse again, multiple-pulse triggers Export positive current with gate circuit, positive electricity makes phase, the ground short circuit actuating of relay after flowing through driving amplifier, phase, ground short circuit electric current make RCCB trips, thus also carrying out open circuit protection to current in wire overload taking precautions against while small current short circuit is burnt；And Cut the anti-interference delay circuit of up-to-date style also trigger while sending trigger pulse to multiple-pulse triggering with gate circuit periodic resist dry Disturb delay circuit, after time delay, bistable state monolateral triggering electrical switch obtains from negative output pulse-triggered line and makes its outfan The electric pulse that voltage restores, causes bistable state monolateral triggering electrical switch to enter the new pulse period after reaching time delay again；It is special Levying is: the overcurrent protection circuit replacing thermal tripping mechanism is to extract circuit to complete by explosion-continuousshort short circuit signal.