CN202558405U - Emergent electric control switching off protection system of elevator - Google Patents
Emergent electric control switching off protection system of elevator Download PDFInfo
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- CN202558405U CN202558405U CN2012202307186U CN201220230718U CN202558405U CN 202558405 U CN202558405 U CN 202558405U CN 2012202307186 U CN2012202307186 U CN 2012202307186U CN 201220230718 U CN201220230718 U CN 201220230718U CN 202558405 U CN202558405 U CN 202558405U
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Abstract
The present invention discloses an automatic and emergent electric control switching off protection system technology of elevator in out-of-control and overspeed condition falling into the field of electrical control security technology. The technology is characterized in that a controlled switching off device is installed in the important power supply line of the elevator, the device can be controlled by normally installed speed limiter to switch on and off in case of overspeed action, and is simultaneously controlled by other sensing and detection devices of the system according to the needs. The technology fully retains and utilizes the original switch, device and control system of the elevator, simply replaces or adds a small amount of electrical control material to be able to realize more and higher elevator protection functions, and has very positive significance for stopping all kinds of serious accidents such as sliding, rushing to the top with high speed, or falling down of the elevator in man-induced, or accidental circumstances.
Description
Technical field
The utility model relates to the safety control technology of elevator, especially relates to the electrical open protection system that restriction elevator serious accident takes place, and belongs to elevator electrical control security protection technology field.
Background technology
Elevator in order to ensure its safety, must be provided with the maltilevel security guarantee of electric aspect and mechanical aspects as manned Transport Machinery technically.Protection during with elevator overspeed is an example, aspect mechanical protection, still relies on safety tongs device, wire holder device at present, and near the protection the end station then relies on buffer device.Aspect electric protection, the general at present method that adopts still only relies on the hypervelocity actuating length switch on the velocity limiter to control a safety relay, and the contact of safety relay is controlled the coil of band-type brake contactless switch and operation contactless switch more indirectly.When hypervelocity actuating length switch broke off because of elevator overspeed, safety relay is dead electricity at first, and then made the control coil dead electricity of band-type brake contactless switch and operation contactless switch, finally let band-type brake dead electricity and stop elevator.Near the end station electric protection then relies on long-range, the short distance position signal switch (also claiming to force speed reducing switch) at approach end station, and when switch motion, elevator provides deceleration instruction rather than parking, braking instruction in good time.The protection that elevator surmounts behind the level position relies on the switching of surpassed distance position limitation protection switch and end position protection switch to move, and makes band-type brake contactless switch dead electricity indirectly, finally still relies on the band-type brake dead electricity to come stop elevator.The drawback of mechanical overspeed protection device is: when hypervelocity action takes place for it; Because mechanical impulse force is huge; Not only can send a telegraph the relevant mechanical part of ladder than havoc, injury or distortion; But also can cause passenger's fear or slight wound, and overhaul the difficulty increase that resumes operation, it is longer to recover normal production time.If electric protection can in case of emergency be brought into play the effect of its stop elevator reliably; Then its preceence is conspicuous; Because the impulsive force during its stop is less; Can not cause the injury or the distortion of mechanical part, be unlikely to cause passenger's fear or slight wound, it is also shorter to recover normal production time.But; Present electric security protector measure but only is confined to the indirect type protection; Even in case of emergency, do not take direct break type safety method yet, this just makes when unreliable problem takes place the electrical equipment of indirect protection; Hardover failure just can take place in elevator, and such fault often can cause more pernicious accident generation.The elevator that for example the contact adhesion of too much cause band-type brake control contactor took place once in the reality and the caused casualty accident instance of rushing to summit; Also took place to be caused elevator slide car even shear accident of hurting sb.'s feelings or the like by unexpected short circuit because of safety return circuit; These examples prove invariably: rely on travel switch elder generation control relay; Rely on relay to control the band-type brake contactless switch again; Finally utilize the band-type brake contactless switch to make the method for this indirect type stop elevator of band-type brake dead electricity again, in case of emergency exist serious unreliable problem.
In the practice; Many elevators are arranged in the wire loop of the control power supply power supply contactless switch of the contact series connection access elevator that is installed on the terminal limit protection switch of hoistway; Make after elevator is being broken through end position; Cut off the power supply of control loop because of the disjunction of limit protection switch causes power supply power supply contactless coil dead electricity, make the band-type brake dead electricity and stop elevator.The general supply that also has elevator to insert elevator to the contact of limit protection switch is controlled in the dropout control coil of circuit breaker; When elevator was broken through end position, limit switch was connected, and therefore the dropout control coil gets electric dropout; Make the cut-out switch tripping operation, cut off the general supply of elevator.Though but said method is simple, car or overspeed elevator are like water off a duck's back to slipping, because elevator must run to the terminal end position of hoistway, this fender guard just can move, and just carry out stop to elevator this moment, and meaning is little.
Consult elevator technology data and patent publication through the applicant limitedly; All do not see such elevator public technology: when hypervelocity; Perhaps when the danger signal of other type surpasses setting threshold; Make a controlled cut-out switch tripping operation open circuit, in order to cut off the band-type brake power supply at least or to cut off the elevator general supply.
The purpose of the utility model will overcome above-mentioned shortcoming exactly, remedies the deficiency of prior art, proposes the automatically controlled open circuit protection of a kind of elevator emergency system.The positive effect of this system is:
1, can keep existing electrical control indirect protection system fully; And native system as the second heavy outpost of the tax office of will protecting in the electrical protection systems; Therefore all existing protections can not be affected, and this will improve the safe reliability of elevator device greatly.
2, the optional position in travel of elevator (lift) as long as the emergency situation of classes such as the elevator generation is out of control, slide car, hypervelocity all can cut off elevator band-type brake power supply immediately at least, perhaps cuts off the elevator supply general supply, thereby makes the band-type brake coil losing electricity by force and stop elevator.
Even being contactless switch or the contact adhesion of relay in the band-type brake control path, 3 out of control, the reasons of car or hypervelocity of slipping cause; Or cause because of contactless switch, relay damaged, jam; Or because of the unexpected short circuit of local circuit causes, or cause that this system can both normally play a role because sporadic elevator is out of control; Can both accomplish to cut off in time the band-type brake power supply, stop elevator.
Another purpose of the utility model is to be applied to the substantive technology of the utility model in the elevator control gear.For example can native system be applied in the control housing of elevator, make it to become a kind of elevator control cabinet with urgent automatically controlled break protecting.
A purpose again of the utility model is to be applied to the substantive technology of the utility model in this big system of elevator, makes it to become the elevator with urgent automatically controlled open circuit protection system.
Summary of the invention
The utility model is achieved in that
The automatically controlled open circuit protection of a kind of elevator emergency system; The general supply supply line, brake sticking brake device control circuit, master control system device, safety return circuit, gate interlock loop and the elevator traction electrical motor that comprise elevator; Comprise the hypervelocity step switch XSK that is installed on the elevator governor; The running velocity sensitive member SCQ that comprises elevator; Comprise the position signal element SDK and the XDK that are installed near elevator hoistways upper and lower end station; It is characterized in that: also comprise a controlled turn-off switchgear, said controlled turn-off switchgear comprises the cut-out switch (1) that has one group of master control electric contact, comprises a controlled trip mechanism (2) that has dropout control coil L; Comprise the tripping controller or a dropout control circuit (3) that can impose the switching current control to the dropout control coil L in the controlled trip mechanism (2), said (1), (2) and (3) three can have various combination forms and constitute a separate component or two separate components or three separate components; One group of master control contact of said cut-out switch (1) is connected in the general supply supply line of said elevator, and perhaps being connected at least can be in the circuit of said brake sticking brake device coil power supply; Said tripping controller or dropout control circuit (3) are controlled by an open type clearance order controlled end KD and/or a closed type clearance order controlled end BD; One or more elevator emergencies are set to open circuit and executes control switch electric contact and controlled end KD end and/or BD and hold and be electrically connected; Wherein be electrically connected to said open type clearance order controlled end KD, be electrically connected to said closed type clearance order controlled end BD as if the switch contact that under the normal circumstances is closo as if the switch contact that under the normal circumstances is disconnect type; Said controlled turn-off switchgear is arranged to: its cut-out switch (1) power supply of can normally closing a floodgate under the normal circumstances; And when its open type clearance order controlled end KD institute bonded assembly elevator emergency cut-out switch contact when off-state becomes on-state; Perhaps when its closed type clearance order controlled end BD institute bonded assembly elevator emergency cut-out switch contact when on-state becomes off-state; Its tripping controller or dropout control circuit (3) output of the dropout control coil L in its controlled trip mechanism (2) immediately drop-away current; Make its trip mechanism (2) carry out the action of threading off immediately; Cause its cut-out switch (1) tripping operation to open circuit the circuit that its master control contact of disjunction is controlled.
Cut-out switch recited above (1), controlled trip mechanism (2) and tripping controller or this three of dropout control circuit (3) can have multiple array configuration and constitute a separate component or two separate components or three separate components.First kind of array configuration is: three central combination is integral; Can constitute one " external switch controollable circuit breaker "; Its inside had both included one group of master control contact (1) of cut-out switch; Include dropout control coil L and dropout control mechanism (2) again, contain dropout control circuit (3) again simultaneously, and have switching mode clearance order controlled end KD and/or BD.Second kind of array configuration is: (1) and (2) is combined into one; A kind of exactly circuit breaker that has cut-out switch master control contact (1), trip coil L and trip mechanism (2); But such circuit breaker also should have the controlled pig-tail wire of trip coil L, relies on pig-tail wire to be controlled by the another one separate component---tripping controller or dropout control circuit (3).The third array configuration is: (2) and (3) are combined into one; Constitute " shunt release " with trip coil L, trip mechanism (2) and dropout control circuit (3); This shunt release also has switching mode clearance order controlled end KD and/or BD; And can with another separate component---cut-out switch (1)---close installation with one group of switch contact; Make when this fabricate block---when the shunt release action is threaded off, can drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction.All right the 4th kind of array configuration of separate one-tenth of three, wherein (2) have trip coil L and trip mechanism, itself are exactly a kind of form of shunt release; Its dropout is controlled by tripping controller or this separate component of dropout control circuit (3); (1) with (2) close installation, when the controlled dropout of separate component (2), drives this separate component of cut-out switch (1) immediately; Its tripping operation is opened circuit, its master control switch contact of disjunction.Certainly, tripping controller or dropout control circuit (3) as separate component itself should have switching mode clearance order controlled end.Switching mode clearance order controlled end is divided into open type controlled end KD and closed type controlled end BD, as required, can the both be provided with, and one of them perhaps only is set.Also can the both be provided with, but only utilize one of them as required.Like no closed type controlled end, can adopt the method for short circuit that it is idle.No open type controlled end, directly on the shelf getting final product.Cut-out switch described here is meant the low pressure, the switchette that are suitable for elevator applications, and small-sized, mould shell cut-out switch encapsulation, that have one group of switch contact, also be commonly called as " air switch ".
Further; In order to realize the purpose of the utility model; On the total power supply circuit of elevator or installing in the supply line of band-type brake coil under the condition of above-mentioned controlled cut-out switch main contact at least, also must having opens circuit executes the control switch contact and comes its enforcement control of opening circuit.First-selected opening circuit executed the hypervelocity actuating length switch that the control switch contact is on the elevator governor to be had.Method is: it is that an elevator emergency opens circuit and executes control switch electric contact that the hypervelocity step switch electric contact XSK on the elevator governor is arranged to; It is electrically connected with open type controlled end KD or closed type controlled end KD in the said controlled turn-off switchgear; Make when described hypervelocity step switch electric contact XSK when normal condition sports error state; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
In general, hypervelocity step switch electric contact XSK under normal circumstances is arranged to on-state usually, and therefore, it just should be electrically connected with the closed type controlled end KD of controlled turn-off switchgear generally speaking.Under abnormal condition, for example overspeed switch moves because of elevator overspeed, and this moment, this switch electric contact can sport off-state from closure state; Tripping controller in the so controlled turn-off switchgear or dropout control circuit (3) be the trip coil L outgoing current in controlled trip mechanism (2) immediately; Make its dropout, drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction; The final band-type brake power supply that cuts off makes elevator stopping.
Further; Can also utilize a running velocity sensitive member SCQ of elevator; Set up an overspeed testing apparatus (4), it is that an elevator emergency opens circuit and executes control switch electric contact that its hypervelocity relay output electric contact CSJ is arranged to, and the open type controlled end KD in itself and the said controlled turn-off switchgear is electrically connected; And be arranged to when the running velocity of said elevator surpass in the detecting device (4) preset threshold value the time; Said hypervelocity relay output electric contact CSJ is the adhesive on-state from the disjunction state mutation promptly, therefore and immediately tripping operation of the cut-out switch of said controlled turn-off switchgear (1), the circuit that its master control contact of disjunction is controlled.
In modern times in the elevator, the normally digital photoelectricity code sender of running velocity sensitive member SCQ, it is installed in the elevator traction machine axle head usually, with the coaxial rotation of traction motor.Also have with elevator governor coaxial mounted.A hypervelocity monitoring device (4) is set here, in digital circuit is set, the digital electrical pulsimeter that utilizes the speed sensor of elevator to send is calculated the real-world operation speed of elevator; Compare with the hypervelocity threshold value that presets of device (4), when real-world operation speed during greater than this hypervelocity threshold value that presets, hypervelocity has taken place in the decidable elevator; After handling through proper technique, if elevator still is in overspeed condition, the then output relay adhesive in the monitoring device of order hypervelocity immediately (4); Its output relay contact CSJ promptly sports on-state from off-state; Open type controlled end KD in the said controlled turn-off switchgear is because of receiving the on-off signal of this state mutation, and its tripping controller or dropout control circuit (3) be the trip coil L outgoing current in controlled trip mechanism (2) immediately, makes its dropout; Driving cut-out switch (1) tripping operation opens circuit; Its master control contact of disjunction finally cuts off the band-type brake power supply, makes elevator stopping.
Further; When hoisting motor is permagnetic synchronous motor; A hoisting motor terminal frequency detecting device (5) can be set on the driving input circuit of said hoisting motor; And the relay contact CPJ of its overclocking relay output is arranged to is that an elevator emergency opens circuit and executes control switch electric contact; Open type controlled end KD in itself and the said controlled turn-off switchgear is electrically connected, and be arranged to terminal frequency when said hoisting motor surpass detecting device (5) preset frequency threshold the time, said overclocking relay output electric contact CPJ is the adhesive on-state from the disjunction state mutation promptly; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
Why being chosen in hoisting motor is the time marquis of permagnetic synchronous motor; A hoisting motor terminal frequency detecting device (5) can be set on the driving input circuit of said hoisting motor; The first considers that the terminal frequency of permanent-magnet synchronous elevator is directly proportional with its operating speed; Therefore when the motor overspeed operation, its terminal frequency also must overclocking.It two is to consider at some in particular cases; When the output contactless switch dead electricity of elevator variable frequency device and after the electrical communication of disjunction itself and permagnetic synchronous motor; If permagnetic synchronous motor is also in running; It will be the same to an electrical generator so, and its stator winding can send voltage in terminal, and the frequency of its voltage is also proportional with its rotating speed.Even therefore the elevator variable frequency device with the open circuited situation of motor under, whether overclocking detecting device (5) still can detect electrical motor and exceed the speed limit.If detecting device (5) monitors elevator and exceeds the speed limit; Then make the output relay CPJ adhesive under its control immediately, its output relay contact CPJ promptly sports on-state from off-state, and the open type controlled end KD in the said controlled turn-off switchgear is because of receiving the on-off signal of this state mutation; Its tripping controller or dropout control circuit (3) be the trip coil L outgoing current in controlled trip mechanism (2) immediately; Make its dropout, drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction; The final band-type brake power supply that cuts off makes elevator stopping.
Further; It is that an elevator emergency opens circuit and executes control switch electric contact that the relay contact Y0 that the master control system device of said elevator is controlled is arranged to; It is electrically connected with open type controlled end KD or closed type controlled end KD in the said controlled turn-off switchgear; Make when the on off state of said relay contact Y0 controlled and when normal condition sports error state; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
The relay contact Y0 is here controlled by the master control system device of elevator; The master control system device of elevator can be micro-processor controlled computer plate usually; Or programmable controller PLC; And relay contact Y0 can be the relay output point of computer control desk or PLC; Can certainly be that it under normal circumstances is open circuited (open types) that this electric contact Y0 both can be arranged at the electric contact of a computer control desk or an outside relay under PLC control, also can be arranged under normal circumstances be closed (closed types).
Since relay contact Y0 is controlled by the master control system device of elevator, its operating state just can be controlled through program setting through microcomputer in the computer control desk or PLC so.So further; The master control system device of said elevator is arranged to examine through said elevator speed-measuring device and is picked up and judge whether said elevator exceeds the speed limit; When the action threshold value that presets in the master control system device of amplitude greater than said elevator of said elevator overspeed, even the master control system device of said elevator sports error state with its said relay contact Y0 from normal condition.
That is to say that the master control system device of elevator can be write one section such program: utilize the speed measuring device of elevator, the digital code sender SCQ that is installed in the elevator traction machine axle head for example capable of using; The computer apparatus of master control system can calculate the current running velocity of elevator through the unit time pulse count that it transmits into; With the preset hypervelocity threshold in this speed and the computer,, handle through proper technique when the current running velocity value of elevator during greater than the hypervelocity threshold value that presets; The master control computer apparatus of elevator is with making the relay contact Y0 under its control sport error state from normal condition; For example break off (often opening) state, become relay adhesive, Y0 on-state, so the open type controlled end KD in the controlled turn-off switchgear is because of receiving the on-off signal of this state mutation from just often Y0; Its tripping controller or dropout control circuit (3) i.e. be trip coil L outgoing current in controlled trip mechanism (2); Make its dropout, drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction; The final band-type brake power supply that cuts off makes elevator stopping.
Computer control desk or PLC that elevator has been arranged; Can also give Y0 other a lot of functions; For example further; Can through said elevator speed-measuring device and said gate interlock loop normally whether state examine pick up and judge said elevator whether be in open the door in service; When said elevator is in the running state of opening the door, and running velocity or time of run preset greater than said master control system device the highest permission threshold value the time, even the master control system device of said elevator sports error state with its said relay contact Y0 from normal condition.
If elevator is the operation of opening the door, and the speed that needs only is enough big, the time long enough, and can be judged to be is that dangerous slide car has taken place, and at this moment should cut off the power supply of band-type brake coil at least immediately, lets elevator brake.Native system bears, perhaps bears simultaneously the output task of this break signal by the relay output electric contact Y0 under the computer control.When computer calculates according to programme and initial conditions and judges that elevator opens the door speed or time of operation during greater than the threshold value that presets; Even relay contact Y0 sports error state from normal condition, for example make that relay contact Y0 is adhesive, on-state from just often disjunction state mutation, so the open type controlled end KD in the controlled turn-off switchgear is because of receiving the on-off signal of this state mutation; Its tripping controller or dropout control circuit (3) i.e. be trip coil L outgoing current in controlled trip mechanism (2); Make its dropout, drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction; The final band-type brake power supply that cuts off makes elevator stopping.
Further; Adopt the modem elevator of computerized control system can also give or give simultaneously Y0 another function; Examine near the state of the position signal switch S DK at hoistway upper and lower end station and XDK through said elevator speed-measuring device and said elevator and to pick up and judge the whether end station of quick approach hoistway of said elevator; If inspection is picked up described arbitrary end station signal switch and has been in abnomal condition; When said elevator still is in unmoderated high-speed cruising state after technical time-delay, even the master control system device of said elevator sports error state with its said relay contact Y0 from normal condition.
When elevator near the end station of hoistway near the time, will touch end station location signal switch SDK (upstation) or XDK (station, lower end) action, if this moment, elevator did not still slow down; High-speed cruising still, and do not have slowdown sign, it is out of control just can be judged to be elevator; So can write one section such program in the computerized control system of elevator, this program can be according to the action situation of end station location signal switch SDK or XDK, and elevator through the velocity pick-up element testing to instantaneous velocity judge whether elevator has been in runaway condition; If comparative result is " being "; Then make relay contact Y0 sport error state, for example make that relay contact Y0 is adhesive, on-state from just often disjunction state mutation, so the open type controlled end KD in the controlled turn-off switchgear is because of receiving the on-off signal of its state mutation from normal condition; Its tripping controller or dropout control circuit (3) i.e. be trip coil L outgoing current in controlled trip mechanism (2); Make its dropout, drive cut-out switch (1) tripping operation and open circuit its master control contact of disjunction; The final band-type brake power supply that cuts off makes elevator stopping.
In fact, owing in the system the controlled turn-off switchgear with the utility model technical characterictic has been installed, makes and also all to adopt above-mentioned method to other emergency situation; Change it into on-off signal; And this on-off signal is arranged to be one executes promptly opening circuit of control to said controlled turn-off switchgear and execute the control signal, like this, when this emergency situation takes place; Can make cut-out switch (1) tripping operation in the controlled turn-off switchgear open circuit immediately; Its master control contact of disjunction finally cuts off the band-type brake power supply, makes elevator stopping.
Need 2 points below the explanation:
1, in the narration if only mention controlled end KD or BD in the controlled turn-off switchgear, be to ignore and do not narrate controlled common port COM so.In fact, except having open type controlled end KD or closed type controlled end BD, controlled common port COM must be arranged also in the controlled turn-off switchgear of native system.Equally, when connecting controlled end KD or BD, also need connect controlled common port COM simultaneously.
2, the controlled end KD of the described controlled turn-off switchgear of the utility model, BD not only can accept contact type on-off signal, can also accept contact pointless type on-off signal.For example can accept the output end signal of photoelectrical coupler fully, for example can accept the on-off signal of transistor collector output form again.
Description of drawings
Accompanying drawing has been enumerated several embodiment, as several kinds of the utility model feasible application.But in fact, this several application example is very incomplete, can under the condition that does not change the utility model flesh and blood, do certain technical adjustment in the practice, to adapt to concrete elevator device.
Fig. 1 is an embodiment who controlled turn-off switchgear is installed in elevator three phase mains end of incoming cables.
Fig. 2 is an embodiment who controlled turn-off switchgear is installed in the 110V power supply AC side of elevator band-type brake coil BZ.
Fig. 3 is an embodiment who controlled turn-off switchgear is installed in the 380V power inleting terminal of elevator control transformer BYQ.This example discloses the method that connects of modal closed type elevator governor switch XSK and controlled turn-off switchgear simultaneously.
Fig. 4 is installed in the embodiment that elevator band-type brake coil BZ adopts the 220V AC side of 220V power supply with controlled turn-off switchgear.This example discloses a kind of physical circuit principle embodiment of said dropout control circuit (3) simultaneously.
Fig. 5 discloses a kind of physical circuit principle of compositionality block diagram example of said overclocking monitoring device (5).
The specific embodiment
Below in conjunction with several concrete embodiment, the utility model is done further to specify.But the applicant is not the qualification to technical scheme to the description of these embodiment, any according to the design of the utility model do in form but not the variation of essence all should be regarded as the protection domain of the utility model.
Fig. 1 is an embodiment who controlled turn-off switchgear is installed in elevator three phase mains end of incoming cables; And controlled turn-off switchgear is a combination entity that comprises cut-out switch (1), controlled trip mechanism (2) and (3) three parts of dropout control circuit; They constitute a unified separate component device, also are that controlled turn-off switchgear is one and has the special circuit breaker of often opening controlled end KD and normally closed controlled end BD.
Three-phase alternating-current supply is imported the cut-out switch (1) in the controlled turn-off switchgear through X0, Y0, Z0 three ends, and mouth is X1, Y1, Z1, after the 380V power supply at X1 wherein and Z1 two ends gets into the input end of voltage transformer BYQ; Be divided into two groups of power supplys; To low pressure using electricity system (not drawing because of irrelevant among the figure), another road is AC110V to AC24V, behind fuse RD1, divides two-way again through fuse RD2; The AC contactor of one road direction AC110V provides the control power supply; Another road through fuse RD3 output, provides direct current (DC) to band-type brake coil BZ and control circuit thereof after rectifier ZL rectification.Among the figure, voltage class is the power supply of the frequency converter output control contactor YC of AC110V by its coil of relay output point Y1 control under the apparatus for controlling elevator KXT control, and R and C are the capacitance-resistance absorption circuit of its coil.Relay control contact MSJ in this control loop is an open type contact of elevator door interlock circuit relay.Control contact in the band-type brake control loop also comprises: safety return circuit relay contact YJ, frequency converter output contactor control contact YC, band-type brake control contactor contact BZC (control loop of irrelevant contact is ignored here).Elevator traction electrical motor YDJ is controlled by frequency converter B PQ; Controlled outlet X1, Y1 and the Z1 of cut-out switch (1) taken from its three-phase alternating current input, and the mouth U of frequency converter, V, W carry the controlled AC through frequency conversion to traction motor YDJ after being controlled by contactless switch YC.Be connected a photoelectric figure formula code sender SCQ with traction motor YDJ is coaxial, the impulse rate of its output is directly proportional with the rotating speed of electrical motor YDJ, so it is as speed measuring device, and the road direction frequency converter B PQ in its pulse carries, with the formation Closed-Loop Speed Governing System.Another road of SCQ output pulse gets into the hypervelocity monitoring device (4) in native system, and its a pair of relay open contact CSJ is connected to and often opens controlled end KD in the controlled turn-off switchgear.SCQ output pulse also has one the tunnel to get into elevator master control unit KXT, and system detects according to the running velocity of programming to elevator.The gate interlock relay contact MSJ that is connected to system input in addition that is monitored simultaneously, near the travel switch SDK of hoistway upstation with near the travel switch XDK at station, hoistway lower end, they link through entrance point X7, X5, X6 and common port COM1 and system respectively here.Control system is associated with this protection system through controlling a relay output point Y0 through behind the monitoring analysis.Because of in this example, Y0 under normal circumstances is open types, so it is connected in the open type controlled end KD in the controlled turn-off switchgear.In addition, be installed on the hypervelocity step switch XSK on the elevator governor because under normal circumstances its contact is connected, so must be connected to the closed type controlled end BD in the controlled turn-off switchgear.
When the situation of elevator overspeed takes place; If the ultra high sped relay CSJ adhesive in the hypervelocity monitoring device (4); Then become " closing " state from " opening " state between open type controlled end KD and the COM, therefore controlled turn-off switchgear makes cut-out switch (1) open circuit because of receiving this control, its master control contact of disjunction; Cut off the input end electric power incoming line of voltage transformer BYQ, band-type brake coil BZ dead electricity and make elevator stopping.
If elevator overspeed makes the hypervelocity step switch XSK action on the velocity limiter, then this switch sports off-state from on-state, and the normally closed controlled end BD of controlled turn-off switchgear makes cut-out switch (1) open circuit because of receiving this control.
If elevator is not a hypervelocity; But the operation of opening the door; Then gate interlock relay contact MSJ becomes the disjunction state from just often closure state, and the axle head code sender SCQ of traction motor is also producing pulse, just explains that elevator is still in operation; So the control system KXT of elevator is through the operation of its program; Finally making the relay contact Y0 under its control is the adhesive on-state from just often disjunction state mutation, and the controlled end KD that often opens in the controlled turn-off switchgear makes cut-out switch (1) open circuit because of receiving this control, its master control contact of disjunction.
If elevator under near the situation at hoistway end station also at high-speed cruising; Then the KXT of system is through the sudden change situation of upper end position switch S DK and lower end position switch XDK; And,, can sell the order of the relay contact Y0 adhesive of being controlled through program run, comparison, judgement through the elevator speed situation that code sender SCQ transmission comes in good time; So the controlled end KD that often opens in the controlled turn-off switchgear makes cut-out switch (1) open circuit because of receiving this control, its master control contact of disjunction.
Fig. 2 is an embodiment who controlled turn-off switchgear is installed in the 110V power supply AC side of elevator band-type brake coil BZ.The difference of present embodiment and Fig. 1 embodiment mainly contains 3 points:
The one, controlled turn-off switchgear has been divided into two separate components; One of them separate component is a kind of " shunt release " that is combined by trip mechanism with trip coil L (2) and dropout control circuit (3); Another is the circuit breaker (1) with two switch main contacts; It and shunt release close installation will drive circuit breaker (1) and trip simultaneously and open circuit together when trip mechanism (2) is threaded off.
The 2nd, the master control contact of cut-out switch is connected on Alternating Current Power Supply one side of band-type brake supply line, like this, even cut-out switch (1) opens circuit, also can not influence power supply to other loop power supplies.
The 3rd, the traction motor YDJ in this example is a permasyn morot; Traction motor terminal frequency detecting device (5) has been inserted in its end of incoming cables, and open contact of its overclocking output relay CPJ and dropout control circuit (3) external often opens controlled end KD and controlled common port COM is connected.
When hypervelocity takes place in elevator; The towing machine rotating speed surpasses normal speed, and the overclocking output relay CPJ adhesive of electrical motor terminal frequency detecting device (5), the adhesive of its open contact CPJ make and often open controlled end KD and COM end short circuit; So causing the trip mechanism (2) of controlled turn-off switchgear threads off; And then drive cut-out switch (1) and open circuit, the supply line of disjunction brake loop makes elevator stopping.The principle of remainder is identical with Fig. 1 embodiment.
Fig. 3 is an embodiment who controlled turn-off switchgear is installed in the 380V power inleting terminal of elevator control transformer BYQ.This example discloses the method that the normally closed controlled end BD of modal closed type elevator governor switch XSK and controlled turn-off switchgear connects simultaneously.
Controlled turn-off switchgear in this example adopts three separate components; Wherein (3) have a tripping controller of one's own, and (1) and (2) close installation and links through special-purpose connecting rod together each other; Make when trip mechanism (2) is threaded off, can drive cut-out switch (1) immediately and open circuit.Governor switch XSK is connected in many switches in the control loop of elevator direct current 110V safety return circuit relay YJ; Unaffected for each other; This example isolation diode D1 that in safety return circuit one side of switch XSK, connects, simultaneously with the wiring circuit of the normally closed controlled end BD of tripping controller (3) in the isolation diode D2 that also connects, like this; When XSK breaks off; The normally closed controlled end BD of tripping controller (3) breaks off with controlled common port COM immediately, and trip mechanism (2) is just threaded off, and drives cut-out switch (1) and opens circuit.Such connection has unique effect; For example suppose that safety return circuit is blocked by accidental short circuit; Promptly hypothesis has a section lead to connect the positive terminal that connects of DC.+ end and safety relay YJ; Because the isolation directional tagging of diode D1 and D2, when governor switch XSK was opened circuit at elevator overspeed, the disjunction effect of cut-out switch (1) can't receive the influence of above-mentioned shorting stub.
This example has also been introduced hypervelocity monitoring device (4), and its speed signal is from speed sensor SCQ, also also with the digital code sender of the coaxial bonded assembly of towing machine.This device adopts the AC24V power supply; An open contact CSJ of its overspeed detection output relay is connected with the open type controlled end KD and the controlled common port COM of tripping controller (3), therefore when exceeding the speed limit monitoring device (4) when detecting elevator overspeed, its output relay contact CSJ adhesive; Tripping controller (3) is the electric current of the conveying of the trip coil in trip mechanism (2) immediately just; Trip mechanism (2) is threaded off, drive cut-out switch (1) and open circuit, thereby cut off band-type brake coil control power supply.
SJK in this example is an elevator hoistways limes superiors position switch; XJK is an elevator hoistways smallest limit position switch, and they under normal circumstances all are in switch closed condition, is connected to normally closed controlled end BD again so can be cascaded them; Like this; All can pass to breaking signal of BD when breaking off when any one in three tandem taps, the cut-out switch (1) in the controlled turn-off switchgear is opened circuit.This example also shows the elevator door interlock circuit, and it is connected with car door interlock switch JM after the Tn series connection by each layer door interlock switch T1 again, controls a gate interlock relay MSJ.
Fig. 4 is installed in the embodiment that elevator band-type brake coil BZ adopts the 220V AC side of 220V power supply with controlled turn-off switchgear.This example discloses a kind of physical circuit principle embodiment of said dropout control circuit (3) simultaneously.
The controlled turn-off switchgear of this example is made up of three separate components; Separate component trip mechanism (2) wherein also is one type a shunt release, has trip coil L in it, built-in dropout link gear TKQ and gang switch K; Can with cut-out switch (1) close installation together; Can realize the interlock dropout, trip mechanism (2) also drives disjunction cut-out switch (1) in disjunction its own switch K.
Tripping controller (3) has often opens controlled end KD and normally closed controlled end BD; And controlled common port COM; Wherein normally closed controlled termination elevator governor switch XSK; Often open controlled end and connect two open contacts that receive controlled relay, one is the overclocking output relay contact CPJ that detects permanent-magnet synchronous traction motor terminal frequency, and another is a relay output contact Y0 who controlled by apparatus for controlling elevator KXT.The main internal circuit configuration of analyzing a kind of tripping controller (3) of this example.
This circuit is introduced the AC220V alternating current from A1 and A2 end, and after miniature transformer BY step-down, through diode D1 to D4 rectification, its positive pole adds to the anode of silicon control KG after through trip coil L, and negative pole connects public ground.The normally closed switch XSK that the LED of photoelectrical coupler BG1 end has been connected external through normally closed controlled end is simultaneously through often opened controlled end KD parallel connection open type relay contact Y0 and CPJ.Under the normal circumstances, the LED of BG1 end connects positive pole through resistance R b, connects negative pole through resistance R k and XSK; So there is electric current to pass through; Be low resistance between the mouth collector and emitter of BG1, its collector voltage is very low, is not enough to get through diac DT; Therefore silicon control KG is in by off state, has only minimum electric current among the L.When the governor switch XSK of external control breaks off, the LED end failure of current of BG1, so be in high-impedance state between its collecting electrode and the emitter immediately, collector voltage raises because of 1 pair of capacitor C k charging of resistance R.When collector voltage rises to the threshold voltage of DT; The unexpected conducting of DT; Capacitor C k discharges into common to silicon controlled trigger electrode g through DT, R2, so silicon control conducting immediately, power source voltage almost all is added on the trip coil L; Make it promote tripping device immediately and thread off, dropout link gear TKQ promotes cut-out switch (1) tripping operation again and opens circuit.Built-in switch K also opens circuit when threading off.The effect of capacitor C b in the circuit is to prevent to disturb.
CPJ or Y0 are from the normally open sudden closure if XSK is normal; Then the LED of BG1 end electric current is gone into common COM by the switch short circuit; The LED end stops making mouth be high-impedance state because of electric current equally; Its result equally makes silicon control KG conducting, and trip coil L gets electric dropout, promotes cut-out switch (1) tripping operation and opens circuit.
Fig. 5 discloses a kind of physical circuit principle of compositionality block diagram example of said overclocking monitoring device (5).
Overclocking monitoring device (5) is introduced power supply from the inlet wire of permanent-magnet synchronous traction motor YDJ, behind low-pass filter, gets into rectifying circuit, and waveform becomes pulsating direct current.At this moment road entering is isolated, filter circuit of pressure-stabilizing, and it is exported to each circuit supply.Another road is shaped as square wave through Schmidt circuit, exports to step-by-step counting, pulse frequency measurement circuit, and passing threshold compares, and when the terminal frequency of motor was higher than predeterminated frequency, the action of overclocking relay output circuit made overclocking output relay CPJ adhesive.The controlled turn-off switchgear that this contact signal is passed in the native system is often opened controlled end KD, can make its cut-out switch (1) tripping operation open circuit immediately, blocks the power supply of band-type brake control coil, makes elevator stopping.
Claims (10)
1. the automatically controlled open circuit protection of elevator emergency system; The general supply supply line, brake sticking brake device control circuit, master control system device, safety return circuit, gate interlock loop and the elevator traction electrical motor that comprise elevator; Comprise the hypervelocity step switch XSK that is installed on the elevator governor; The running velocity sensitive member SCQ that comprises elevator; Comprise the position signal element SDK and the XDK that are installed near elevator hoistways upper and lower end station; It is characterized in that: also comprise a controlled turn-off switchgear, said controlled turn-off switchgear comprises the cut-out switch (1) that has one group of master control electric contact, comprises a controlled trip mechanism (2) that has dropout control coil L; Comprise the tripping controller or a dropout control circuit (3) that can impose the switching current control to the dropout control coil L in the controlled trip mechanism (2), said (1), (2) and (3) three can have various combination forms and constitute a separate component or two separate components or three separate components; One group of master control contact of said cut-out switch (1) is connected in the general supply supply line of said elevator, and perhaps being connected at least can be in the circuit of said brake sticking brake device coil power supply; Said tripping controller or dropout control circuit (3) are controlled by an open type clearance order controlled end KD and/or a closed type clearance order controlled end BD; One or more elevator emergencies are set to open circuit and executes control switch electric contact and controlled end KD end and/or BD and hold and be electrically connected; Wherein be electrically connected to said open type clearance order controlled end KD, be electrically connected to said closed type clearance order controlled end BD as if the switch contact that under the normal circumstances is closo as if the switch contact that under the normal circumstances is disconnect type; Said controlled turn-off switchgear is arranged to: its cut-out switch (1) power supply of can normally closing a floodgate under the normal circumstances; And when its open type clearance order controlled end KD institute bonded assembly elevator emergency cut-out switch contact when off-state becomes on-state; Perhaps when its closed type clearance order controlled end BD institute bonded assembly elevator emergency cut-out switch contact when on-state becomes off-state; Its tripping controller or dropout control circuit (3) output of the dropout control coil L in its controlled trip mechanism (2) immediately drop-away current; Make its trip mechanism (2) carry out the action of threading off immediately; Cause its cut-out switch (1) tripping operation to open circuit the circuit that its master control contact of disjunction is controlled.
2. the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system; It is characterized in that: it is that an elevator emergency opens circuit and executes control switch electric contact that the hypervelocity step switch electric contact XSK on the elevator governor is arranged to; It is electrically connected with open type controlled end KD or closed type controlled end KD in the said controlled turn-off switchgear; Make when described hypervelocity step switch when normal condition sports error state; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
3. the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system; It is characterized in that: a running velocity sensitive member SCQ who utilizes elevator; Set up an overspeed testing apparatus (4); It is that an elevator emergency opens circuit and executes control switch electric contact that its hypervelocity relay output electric contact CSJ is arranged to; Open type controlled end KD in itself and the said controlled turn-off switchgear is electrically connected, and be arranged to running velocity when said elevator surpass in the detecting device (4) preset threshold value the time, said hypervelocity relay output electric contact CSJ is the adhesive on-state from the disjunction state mutation promptly; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
4. the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system; It is characterized in that: when hoisting motor is permagnetic synchronous motor; A hoisting motor terminal frequency detecting device (5) is set on the driving input circuit of said hoisting motor; And the electric contact CPJ of its overclocking relay output is arranged to is that an elevator emergency opens circuit and executes control switch electric contact; Open type controlled end KD in itself and the said controlled turn-off switchgear is electrically connected, and be arranged to terminal frequency when said hoisting motor surpass detecting device (5) preset frequency threshold the time, said overclocking relay output electric contact CPJ is the adhesive on-state from the disjunction state mutation promptly; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
5. the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system; It is characterized in that: it is that an elevator emergency opens circuit and executes control switch electric contact that the relay contact Y0 that the master control system device of said elevator is controlled is arranged to; It is electrically connected with open type controlled end KD or closed type controlled end KD in the said controlled turn-off switchgear; Make when the on off state of said relay contact Y0 controlled and when normal condition sports error state; The cut-out switch of said controlled turn-off switchgear (1) is tripping operation therefore and immediately, the circuit that its master control contact of disjunction is controlled.
6. the automatically controlled open circuit protection of elevator emergency as claimed in claim 5 system; It is characterized in that: the master control system device of said elevator is arranged to examine through said elevator speed-measuring device and is picked up and judge whether said elevator exceeds the speed limit; When the action threshold value that presets in the master control system device of amplitude greater than said elevator of said elevator overspeed, even the master control system device of said elevator sports error state with its said relay contact Y0 that controls from normal condition.
7. the automatically controlled open circuit protection of elevator emergency as claimed in claim 5 system; It is characterized in that: the master control system device of said elevator be arranged to can through said elevator speed-measuring device and said gate interlock loop normally whether state examine pick up and judge said elevator whether be in open the door in service; When said elevator is in the running state of opening the door; And during the highest permission threshold value that running velocity or time of run preset greater than said master control system device, even the master control system device of said elevator sports error state with its said relay contact Y0 that controls from normal condition.
8. the automatically controlled open circuit protection of elevator emergency as claimed in claim 5 system; It is characterized in that: whether the master control system device of said elevator is arranged to examine near the state of the position signal switch S DK at hoistway upper and lower end station and XDK through said elevator speed-measuring device and said elevator and is picked up and judge the said elevator end station of quick approach hoistway; If inspection is picked up described arbitrary end station signal switch and has been in abnomal condition; When said elevator still is in unmoderated high-speed cruising state after technical time-delay, even the master control system device of said elevator sports error state with its said relay contact Y0 that controls from normal condition.
9. elevator control gear that the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system has been installed.
10. elevator that the automatically controlled open circuit protection of elevator emergency as claimed in claim 1 system has been installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012202307186U CN202558405U (en) | 2012-05-10 | 2012-05-10 | Emergent electric control switching off protection system of elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202307186U CN202558405U (en) | 2012-05-10 | 2012-05-10 | Emergent electric control switching off protection system of elevator |
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| CN202558405U true CN202558405U (en) | 2012-11-28 |
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| CN2012202307186U Expired - Fee Related CN202558405U (en) | 2012-05-10 | 2012-05-10 | Emergent electric control switching off protection system of elevator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407852A (en) * | 2013-08-13 | 2013-11-27 | 苏州经贸职业技术学院 | Elevator safety emergency control system |
| CN104444689A (en) * | 2014-11-18 | 2015-03-25 | 苏州通润驱动设备股份有限公司 | Traction wheel safety protection device and elevator car emergency braking method thereof |
| CN110380505A (en) * | 2019-07-09 | 2019-10-25 | 广东寰宇电子科技股份有限公司 | A kind of elevator emergency control system and its emergency control method |
| CN110759200A (en) * | 2019-10-29 | 2020-02-07 | 迅达（中国）电梯有限公司 | Machine-room-less elevator braking force verification device |
| CN112420449A (en) * | 2020-11-25 | 2021-02-26 | 上海新时达电气股份有限公司 | Elevator lock ladder system and elevator |
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2012
- 2012-05-10 CN CN2012202307186U patent/CN202558405U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407852A (en) * | 2013-08-13 | 2013-11-27 | 苏州经贸职业技术学院 | Elevator safety emergency control system |
| CN103407852B (en) * | 2013-08-13 | 2015-08-05 | 苏州经贸职业技术学院 | Elevator safety emergency flight control system |
| CN104444689A (en) * | 2014-11-18 | 2015-03-25 | 苏州通润驱动设备股份有限公司 | Traction wheel safety protection device and elevator car emergency braking method thereof |
| CN104444689B (en) * | 2014-11-18 | 2016-08-17 | 苏州通润驱动设备股份有限公司 | A kind of traction sheave safety guard and the method for urgent stop elevator car thereof |
| CN110380505A (en) * | 2019-07-09 | 2019-10-25 | 广东寰宇电子科技股份有限公司 | A kind of elevator emergency control system and its emergency control method |
| CN110380505B (en) * | 2019-07-09 | 2023-08-04 | 广东寰宇电子科技股份有限公司 | Elevator emergency control system and emergency control method thereof |
| CN110759200A (en) * | 2019-10-29 | 2020-02-07 | 迅达（中国）电梯有限公司 | Machine-room-less elevator braking force verification device |
| CN112420449A (en) * | 2020-11-25 | 2021-02-26 | 上海新时达电气股份有限公司 | Elevator lock ladder system and elevator |
| CN112420449B (en) * | 2020-11-25 | 2024-03-19 | 上海新时达电气股份有限公司 | Elevator locking system and elevator |
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