CN201207356Y - Voltage step track relay - Google Patents

Voltage step track relay Download PDF

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Publication number
CN201207356Y
CN201207356Y CNU2008200368085U CN200820036808U CN201207356Y CN 201207356 Y CN201207356 Y CN 201207356Y CN U2008200368085 U CNU2008200368085 U CN U2008200368085U CN 200820036808 U CN200820036808 U CN 200820036808U CN 201207356 Y CN201207356 Y CN 201207356Y
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CN
China
Prior art keywords
relay
voltage
chip
track
circuit
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Expired - Fee Related
Application number
CNU2008200368085U
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Chinese (zh)
Inventor
鲍焕祥
汪志忠
李文斌
吴广军
董凯
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Huainan Mining Group Co Ltd
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Huainan Mining Group Co Ltd
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Priority to CNU2008200368085U priority Critical patent/CN201207356Y/en
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Publication of CN201207356Y publication Critical patent/CN201207356Y/en
Anticipated expiration legal-status Critical
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Abstract

Disclosed is a voltage step track relay, which is characterized in that a timing base integrated circuit can be used to continuously detect track-surface voltage when setting the timing base integrated circuit, and pulse signals can be outputted at the time of the track-surface voltage generates the step change; and the pulse signals can control an execution relay J to rise or fall through a relay drive circuit. The voltage step track relay can utilize the step changes generated by the track-surface voltage to generate the impulse signals, so as to control the execution relay J to rise or fall, can effectively overcome the problem that electromagnetic relay in the prior art can not fall reliably because the track circuit shunted state is poor, so as to cause interlocking relation failure, thus avoiding the driving accidents which possibly occur.

Description

Voltage step track relay
Technical field
The utility model relates to the railway traffic control system, the relay circuit in a kind of station interlocking JZXC480 type AC track circuit that is applied in the railway traffic control system of more specifically saying so.
Background technology
Track circuit is the outdoor equipment of railway signal system, its effect in railway signal control system be the supervision car team dynamically, the situation that takies of reflection track.The railway driving scheduling personnel come layout route, conversion track switch according to this by the light belt information of track circuit feedback to the signal controlling platform, organize train reception and departure and shunting service.At present, the track circuit that Chinese Railway is used mainly contains JZXC-480 type AC track circuit, 25HZ phase-sensitive track circuits, frequency shift modulated track circuit or the like, because JZXC-480 type AC track circuit equipment is simple, stable performance, low, the and simple and convenient for maintenance of cost, what use in China railways mainly is this track circuit, and what especially the overwhelming majority was used in industrial and mining enterprises' railway all is this track circuit.
Because the influence of electromagnetic device hysteresis in the electromagnetic relay, the reliable pick-up value of JZXC-480 type relay is 9.2V, and reliable drop-away value is 4.6V.In the on-the-spot use of railway, because the influence of factors such as track corrosion, rail level laying dust, greasy dirt, after causing train to press rail, it is excessive to take turns right shunt resistance, the track circuit receiving-end voltage can not drop to below the reliable drop-away value of relay, and track relay can not reliably fall (it is not dead to be commonly called as pressure).The train dispatcher can't accurately judge and have or not vehicle to take on the track, and the interlock relation lost efficacy, and very likely caused vehicle front, side collision, the generation of driving accidents such as vehicle off-line (vehicle through track switch time pull track switch).Because track circuit shunting badness hidden danger exists, all there are every year a large amount of accidents to take place, cause casualties and the equipment loss, this is a kind of breakneck potential safety hazard, is that the railway transporting operation scene does not allow to take place.
In the past few years, the railway signal scientific and technical personnel have also proposed some solutions after deliberation as the schemes such as relay that adopt high-voltage pulse track circuit and high release factor, but all too big owing to the original track circuit is changed, expense is high, maybe can not adapt to on-the-spot railway roadbed resistance variations has reduced the reliability of circuit greatly to the railway transportation influence, and is difficult to realize that factor such as failure safe does not reach better effects.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of voltage step track relay is provided, so as effectively to overcome existing electromagnetic relay since shunted state of a track circuit bad cause can not reliably fall the problem that causes interlock connection to lose efficacy, avoid contingent driving accident.
The utility model technical solution problem adopts following technical scheme:
The utility model voltage step track relay is characterized in that being provided with regularly time-base integrated circuit, with described timing time-base integrated circuit rail surface voltage is carried out continuous detecting, and when rail surface voltage produces step and changes output pulse signal; Carry out picking up or full state of relay J with described pulse signal by relay drive circuit control.
Design feature of the present utility model also is:
Base chip IC 1 when regularly time-base integrated circuit adopts, rail surface voltage is passing through resistance R after rectification 1, R 2And R 3, and resistance R 4, R 5And R 6Dividing potential drop after, insert the triggering input of chip IC 1, constitute the continuous detecting circuit that the rail surface voltage step changes.
Between timing time-base integrated circuit and relay drive circuit, be provided with by ic chip 2With triode T 1, T 2The bistable circuit that constitutes.
Be power supply with the rail surface voltage, through D 1-D 4Rectification and capacitor C 1Base chip IC when being described after the filtering 1And ic chip 2Working power is provided.
Redundant transistor T is set in relay drive circuit 4, redundant transistor T 4Ground level through base resistance R 14With ic chip 2DIN end connect and IC 2DIN end through load resistance R 15Be connected with the relay power end.
At power end and triode T 2Base input end between insert voltage-stabiliser tube DZ 1, and in time base chip IC 1Output is provided with isolating diode D 10
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the electromagnetic relay that causes because of shunt resistance is excessive at the JZXC-480 track circuit of the utility model can not fall the situation of the driving hidden danger that causes, utilize regularly time-base integrated circuit, rail surface voltage is carried out continuous detecting, when rail surface voltage produces the step variation, promptly produce the pulse signal control relay and fall or pick up.Because the electric circuit inspection vehicle sails into and the step of the back rail surface voltage of leaving away changes, little with the absolute value relation of rail surface voltage under the certain voltage condition, so overcome because the phenomenon of seemingly inhaling non-suction that produces under a certain voltage conditions of relay existence has been eliminated in the influence of relay electromagnetic device hysteresis.
2, the utility model is the voltage that utilizes rail level to send here, through the working power of rectifying and wave-filtering as circuit, does not therefore need to introduce in addition power supply.
3, ic chip in the utility model 1And IC 2All adopt the CMOS time-base integrated circuit, if rail surface voltage be higher than relay pick up voltage (9.2V)+2V CESAll can guarantee the circuit operate as normal to 18V.Because V CESMinimum, so be applicable to the voltage range that the JZXC480 relay is suitable for substantially.
Base ic chip when 4, the utility model adopts 1, IC 2, its static working current value is about 0.4mA, and circuit is always worked electric current in 5mA, and is minimum to the influence of track circuit.
5, the utility model since when only detecting vehicle and take the step of rail surface voltage change, and the slow variation of the rail surface voltage that the railway roadbed resistance variations that railway roadbed is caused owing to weather reason and other reason causes is insensitive, therefore the work under applicable any circuit and the weather conditions, and do not need the track circuit transmitting terminal is done any adjustment.
6, the utility model is provided with redundant transistor T in drive circuit 4, can realize fail-safe principle to a certain extent so that relay can not pick up when circuit breaks down.
7, the utility model directly inserts rail surface voltage, and on-the-spot utilization is convenient, does not need on-the-spot 480 track circuits to be done any change and adjustment, on-the-spot plug and play.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings:
Embodiment
In the present embodiment, regularly time-base integrated circuit is set, rail surface voltage is carried out continuous detecting with the timing time-base integrated circuit, and when rail surface voltage produces step and changes output pulse signal; Using state with pulse signal by what relay J was carried out in relay drive circuit control, promptly control relay J's picking up and falling.
In concrete the enforcement, as shown in Figure 1, base chip IC 1 when regularly time-base integrated circuit adopts, rail surface voltage is passing through resistance R after rectification 1, R 2And R 3, and resistance R 4, R 5And R 6Dividing potential drop after, insert the triggering input of chip IC 1 respectively.In the triggering input of time base chip IC 1 capacitor C that is connected in parallel 2, C 3Make when rail surface voltage produces the step variation IC 1Corresponding output pulse signal.
Between timing time-base integrated circuit and relay drive circuit, be provided with by ic chip 2With triode T 1, T 2The bistable circuit that constitutes is used for after rail surface voltage step process finishes, relay remain on pick up or full state on.
Rail surface voltage is on the one hand as outside the detection signal, on the other hand as power supply, through D 1-D 4Rectification and capacitor C 1After the filtering, for comprising time base chip IC 1And ic chip 2Provide working power in interior entire circuit.
In the present embodiment, redundant transistor T is set in relay drive circuit 4, driving tube T 3Base stage connect ic chip 2Output, relay coil J is serially connected in driving tube T 3Collector electrode and power supply between, driving tube T 3Emitter and redundant transistor T 4Collector electrode link to each other redundant transistor T 4Ground level through base resistance R 14With ic chip 2Discharge switch DIS connect and IC 2DIS hold 7 pin through load resistance R 15Be connected with relay power.IC 2, T 3With T 4Common formation relay promotes circuit, redundant triode T 4Guaranteed at T 3Fault and IC 2Relay falls during the output logic gate fault.Load resistance R 15Access make load resistance place in circuit when relay falls, rail surface voltage produces significant change and causes IC when preventing the actuating of relay 1Output pulse signal.
As shown in the figure, at power end and triode T 2Base input end between insert voltage-stabiliser tube DZ 1, and in time base chip IC 1Output is provided with isolating diode D 10, guarantee relay energized after rail surface voltage reaches certain value.
Operation principle: rail surface voltage is after 1,2 terminals are introduced, through D 1-D 4Rectification and capacitor C 1Insert by resistance R respectively after the filtering 1, R 2, R 3And resistance R 4, R 5And R 6The bleeder circuit of forming provides base chip IC when feeding respectively after the dividing potential drop 1TR 1Trigger input pin and TR 2Trigger input 8 pin, base chip IC when making respectively 1V 01Output the 5th pin output high level, IC 1V 02Output the 9th pin output low level is again through switch transistor T 1, T 2After deliver to ic chip respectively 2 TR trigger input 2 pin and its TH threshold value input 6 pin, make ic chip 2Output 3 pin keep high level, through driving tube T 3With triode T 4After, the execution relay J is picked up.
After vehicle pressed track, owing to take turns having shunting action, rail surface voltage produced decline step process, inserts at IC 1TR 1Trigger the capacitor C of input 6 pin 2Make 6 pin voltages can't suddenly change IC under the effect 1V 01Output 5 pin output low level pulses are through switch triode T 2After, make IC 2The 6 pin input high level pulses of TH threshold value input, IC 2V 0Output 3 pin are output as low level and keep, and promote triode T 3, T 4End, relay falls, and the expression vehicle takies track.
Roll the right by-passing of track trailing wheel away from vehicle and disappear, rail surface voltage produces rising voltage step process, because C 3Effect makes IC 1TR 2 Trigger input 8 pin voltages and can not suddenly change IC 1V 02Output 9 pin output high level pulse is through switch transistor T 1Make IC 2 TR trigger input 2 input low level pulses, IC 2V 0Output 3 pin output high level also keeps, and makes it to promote triode T 3, T 4Saturated, carry out relay energized.Voltage stabilizing didoe DZ 1Through R 8With switch transistor T 2Base stage connect, and by diode D 10With IC 1V 02 Voltage output end 9 pin make switch triode T after isolating 1DZ after supply voltage is higher than certain numerical value 1Puncture, make IC 2TR trigger input input low level, V 0End output high level is executed relay energized.Prevent from execution relay J mistake to be fallen owing to disturbing the voltage that produces to descend.Guaranteed also that simultaneously the train back rail surface voltage of leaving away raises and reaches relay energized behind the certain value.
Under normal circumstances, IC 2V 0When voltage output end 3 pin are output as high level, IC 2 DIS discharge switch 7 pin be high-impedance state over the ground, triode T 4Base stage by resistance R 14, R 15Obtain bias current and make T 4Saturation conduction, T 3, T 4Saturation conduction makes relay J get electric picking up simultaneously.Work as IC 2V 0When voltage output end 3 pin are output as low level, IC 2DIS hold 7 pin shorted to earths, T 4Can't obtain bias current and end T 3,T 4End simultaneously, the relay J dead electricity is fallen.
Under failure condition, IC 2When voltage output end 3 pin were low level state, relay electric-loss fell, but because triode T 3Breakdown or IC 2When output is breakdown, the execution relay J is picked up, unsafe condition occur, because IC 2DIN hold 7 pin over the ground for short-circuit condition, thereby make triode T 4Can't obtain bias current, T 4Still remain off, carrying out relay can't pick up, and has realized the principle of fault-safety principle.
Field adjustable: rail surface voltage is through R 1-R 6After the access, adjust R 2, R 5Make IC 15 pin, the equal output low level of 9 pin, IC 23 pin output high level, relay J picks up, adjust finish after, 1,2 terminals insert rail surface voltage, after 3,4 terminals connect JZXC-480 relay coil, circuit board are packed in the relay, directly insert in the on-the-spot Relay base, get final product work.
The utility model utilizes voltage step formula track relay to overcome the influence of relay hysteresis effect, can effectively solve a large amount of shunting badness problems that exist in the track circuit, it is easy to use, shunt is sensitive, through good, reached effective, reliable, economic instructions for use in part railway station result of use.

Claims (6)

1, voltage step track relay is characterized in that being provided with regularly time-base integrated circuit, with described timing time-base integrated circuit rail surface voltage is carried out continuous detecting, and when rail surface voltage produces step and changes output pulse signal; Carry out picking up or full state of relay J with described pulse signal by relay drive circuit control.
2, voltage step track relay according to claim 1, base chip IC 1 when it is characterized in that described timing time-base integrated circuit adopts, rail surface voltage is passing through resistance R after rectification 1, R 2And R 3, and resistance R 4, R 5And R 6Dividing potential drop after, insert the triggering input of chip IC 1, constitute the continuous detecting circuit that the rail surface voltage step changes.
3, voltage step track relay according to claim 1 is characterized in that between described timing time-base integrated circuit and relay drive circuit, is provided with by ic chip 2With triode T 1, T 2The bistable circuit that constitutes.
4, voltage step track relay according to claim 1 and 2, it is characterized in that with described rail surface voltage be power supply, through D 1-D 4Rectification and capacitor C 1Base chip IC when being described after the filtering 1And ic chip 2Working power is provided.
5, voltage step track relay according to claim 3 is characterized in that being provided with redundant transistor T in described relay drive circuit 4, redundant transistor T 4Ground level through base resistance R 14With ic chip 2DIN end (7 pin) connect and IC 2DIN end (7 pin) through load resistance R 15Be connected with the relay power end.
6, voltage step track relay according to claim 3 is characterized in that at power end and triode T 2Base input end between insert voltage-stabiliser tube DZ 1, and in time base chip IC 1Output is provided with isolating diode D 10
CNU2008200368085U 2008-05-23 2008-05-23 Voltage step track relay Expired - Fee Related CN201207356Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101320654B (en) * 2008-05-23 2011-08-31 淮南矿业(集团)有限责任公司 Voltage step track relay
CN106301298A (en) * 2016-08-09 2017-01-04 上海斐讯数据通信技术有限公司 A kind of telecommunication transmission system and method for communication transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101320654B (en) * 2008-05-23 2011-08-31 淮南矿业(集团)有限责任公司 Voltage step track relay
CN106301298A (en) * 2016-08-09 2017-01-04 上海斐讯数据通信技术有限公司 A kind of telecommunication transmission system and method for communication transmission

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090311

Termination date: 20120523