CN203472889U - Double-proximity-switch rash-advance-preventing sensor for railway shunting operation - Google Patents
Double-proximity-switch rash-advance-preventing sensor for railway shunting operation Download PDFInfo
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- CN203472889U CN203472889U CN201320106749.5U CN201320106749U CN203472889U CN 203472889 U CN203472889 U CN 203472889U CN 201320106749 U CN201320106749 U CN 201320106749U CN 203472889 U CN203472889 U CN 203472889U
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- locomotive
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- approach switch
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Abstract
Disclosed is a double-proximity-switch rash-advance-preventing sensor for railway shunting operations and the sensor belongs to a safety device for the railway shunting operation. Because the prior monitoring systems of railway locomotives are incapable of monitoring the shunting operation of the locomotives and shunting accidents are likely to be caused, the device is designed to prevent occurrence of the shunting accidents. The sensor includes two parts: an on-vehicle device and an off-vehicle device. The on-vehicle device, in which two proximity switches are used and a direction judgment logic circuit is designed, mainly includes a numerical-value comparator, a trigger and a register. Probes of the proximity switches are installed at positions 30mm below the horizontal line of a rail surface at the inner side of steel rail. When the locomotive approaches, wheel edges of locomotive wheels enter the detection scopes of the proximity switches and touch the proximity switches and then the direction judgment logic circuit identifies the direction from which the locomotive comes according to the touch sequence of the proximity switches and sends out a stop signal to a locomotive in a specific approaching direction through a signal loop wire. The on-vehicle device, in which a window comparator is designed to detect the stop signal, only responds to the stop signal sent out by the off-vehicle device and makes the locomotive stop emergently.
Description
Technical field: railway train arrangement operation safety apparatus
Background technology: this equipment is mainly used in without the shunting signal of signaling section, switch indicator, has derail indicator, the soil gear in the goods yard of signaling section and the stub end siding that needs key protection.Due to the existing split run single driver crew duty mode of railway, on locomotive, only has a driver, Xin lookout is of crucial importance, because existing locomotive monitor device can not be monitored locomotive shunting service, once not rush across the shunting signal of closing or locomotive wheel and press derailer etc. and all can cause train operation accident, harm railway operation safety when trainman has confirmed because of overwork, the reason such as absent-minded that signal causes.
Summary of the invention: for avoiding shunting railway locomotives operation generation train operation accident, do not disturbing normal shunting service, in principle, research and development have designed the anti-sensor that advances rashly of the two approach switch formulas of railway train arrangement operation to the working link that does not add manual operation to trainman.Advance rashly: " just refer to that locomotive crosses hastily the signal in closed condition and enter the block section that this signal protects." this equipment is divided under car equipment two parts on equipment and car.Entreat in the heart and reserved locomotive emergency stopping distance position in the road that under car in equipment, equipment is arranged on circuit the place ahead of railway equipments such as needing the shunting signal of protection, derailer.In the shunting service of locomotive, once the zone of protection of locomotive access arrangement, under car, equipment is launched stop signal, if now LKJ2000 type monitor is in shunting mode, on car, equipment just can identify car and divide into the stop signal that preparation is penetrated, and makes locomotive carry out immediately emergency braking, is parked in the place ahead of shunting signal, derailer after assurance locomotive emergency braking, thereby the shunting signal of avoiding locomotive to rush across closing or press derailer, guarantees the safety of shunting service.
Accompanying drawing explanation: Fig. 1 is the power circuit principle figure of equipment under car; Fig. 2 is the logic control circuit schematic diagram of equipment under car; Fig. 3 is the logic control schematic diagram of equipment on car; Fig. 4 is the power circuit principle figure of equipment on car; Fig. 5 is locomotive operation schematic diagram; Fig. 6 is that approach switch is installed position view; Fig. 7 is equipment scheme of installation under car; Fig. 8 is functions of the equipments schematic diagram on car; This equipment is divided under car equipment two parts on equipment and car.
The specific embodiment
The function of equipment under car:
1, automatic decision direction to the car, the locomotive only specific direction to the car being sailed into is launched stop signal by signal loor, and the locomotive that nonspecific direction to the car is sailed into is not launched stop signal.Guarantee not affect the work of shunting of railway locomotive.
The time of 2, at every turn launching stop signal is 10 seconds, after locomotive emergency braking, waits for that 10 seconds drivers can alleviate emergency braking.
3,, when locomotive turns line and returns trouble operation, after the zone of protection hard brake stop of the careless access arrangement of driver, wait for that 10 seconds drivers can alleviate emergency braking reverse direction operation.
4, when locomotive turns line and returns trouble operation, when driver makes because of carelessness locomotive wheel be parked on approach switch sensor and does not trigger stop signal, as long as parking period was over 50 seconds, driver can handle locomotive reverse direction operation, under car, equipment can not launched stop signal, because driver's the end operation of changing at least needs 60 seconds, so can not affect normal shunting service.
5, under car, double relay electric power loop has been used in equipment design, when shunting signal is opened, while showing month white light, under car, equipment cuts off device power supply (DPS) by two relays, if one of them relay fault, another relay can be cut off the electricity supply equally, and locomotive just can enter zone of protection and cross shunting signal and shunt, and guarantees not affect normal shunting service.
6, waterproof, against shock.
7, the operating temperature of equipment is 40 degrees below zero to 150 degree, can adapt to harsh environment.
The function of equipment on car:
1, on car, equipment is used isolation amplifier to obtain the induced signal of cab signal receiving coil, guarantees not affect the normal operation of locomotive LKJ2000 monitored control system and cab signal.
2, on car, equipment automatic distinguishing car is divided into the specific stop signal that preparation is penetrated, and only, when receiving car and divide into the stop signal that preparation penetrates, just makes locomotive emergency braking, when receiving other signals, can not make locomotive emergency braking.
3, on car, equipment only just works when LKJ2000 monitor enters shunting mode.
4, on car, equipment is provided with failure removal switch, and when equipment malfunction is done or broken down, driver can excise equipment on car by operational failure excision switch, guarantees not affect shunting service.
With the principle of work that is used in conjunction with devices illustrated of this equipment and shunting signal, while being used in conjunction with other equipment (derail indicator, soil gear indicator), the principle of work of equipment is identical.
Equipment principle of work under car
Figure (5)
1,, when locomotive comes from specific direction to the car, wheel produces truth table through " approach switch A ", " approach switch B ":
| Approach switch A | Approach switch B |
| 0 | 0 |
| 1 | 0 |
| 1 | 1 |
| 0 | 1 |
| 0 | 0 |
2,, when locomotive comes from nonspecific direction to the car, wheel produces truth table through " approach switch A ", " approach switch B ":
| Approach switch A | Approach switch B |
| 0 | 0 |
| 0 | 1 |
| 1 | 1 |
| 1 | 0 |
| 0 | 0 |
Circuit layout is only effective to specific direction to the car, because two directions to the car produce truth table difference, decision circuit is transmitting emergency stop signal after recognizing the truth table data that specific direction to the car produces only, recognizes after the truth table data that nonspecific direction to the car produces not transmitting emergency stop signal.
Under car, the circuit of equipment is comprised of power circuit and decision circuit two parts.
Power circuit: figure (1)
220V alternating current is through the former limit winding of relay " 3KA's is normally closed ", relay " 5KA's is normally closed " contact access " voltage transformer T1 ", " voltage transformer T2 ", pass through " voltage transformer T1 ", " voltage transformer T2 " step-down, then pass through the vdc of " rectifying and wave-filtering " obtain+5V ,+6V ,+24V ,-24V.When shunting signal shows that month white light permits shunting, shunting signal+12V direct current (DC) is input to " 3KA relay coil ", " 5KA relay coil " circuit by " plug K ", after " 3KA relay coil ", " 5KA relay coil " invocation point, relay " 3KA's is normally closed ", relay " 5KA's is normally closed " contact disconnect 220V power supply, the power supply of cut-out equipment, makes locomotive can cross shunting signal and carries out shunting service.
Decision circuit: figure (2)
The output signal of " approach switch A ", " approach switch B " is input to respectively: " time delay Schmidt trigger A ", " time delay Schmidt trigger B ", " d type flip flop ", " shift register ", " A, B zero state clear circuit ", " A, 50 seconds clear circuits of B mono-state time delay ".
When " approach switch A ", " approach switch B " are " 0 " state, the A1 of " digital comparator ", A0, B1, B0 end are " 0 " state, A=B end is high level, the mouth of " shift register " is low level, and " A, B zero state clear circuit " makes " shift register " zero clearing to " shift register " input reset signal.
When " approach switch A " is one state, when " approach switch B " is " 0 " state, by " time delay Schmidt trigger A ", " time delay Schmidt trigger B " is input to the A1 of " digital comparator ", A0 end, A1 end is one state, A0 end is " 0 " state, because " digital comparator, , B1, B0 end is " 0 " state, so the A=B of " digital comparator " holds output low level, the low level of the A=B end of " digital comparator " is input to " time delay Schmidt trigger C ", " time delay Schmidt trigger C " is to " d type flip flop " output high level pulse,
" d type flip flop " is input to " 0 " state of the one state of " approach switch A ", " approach switch B " at B1, the B0 end of " digital comparator ", B1 end is one state, B0 end is " 0 " state, now A1, A0 equal B1, B0, the A=B of " so digital comparator " end output high level, the CP termination of " shift register " is received after the high level signal of A=B end of " digital comparator " the one state shift LD of " approach switch A ".
When " approach switch A " is one state, when " approach switch B " is one state, by " time delay Schmidt trigger A ", " time delay Schmidt trigger B " is input to the A1 of " digital comparator ", A0 end, A1 end is one state, A0 end is one state, because the B1 of " digital comparator " end is one state, B0 end is " 0 " state, so the A=B of " digital comparator " holds output low level, the low level of the A=B end of " digital comparator " is input to " time delay Schmidt trigger C ", " time delay Schmidt trigger C " is to " d type flip flop " output high level pulse, " d type flip flop " is by the one state of " approach switch A ", " 1 " of " approach switch B " is input to the B1 of " digital comparator ", B0 end, B1 end is one state, B0 end is one state, A1 now, A0 equals B1, B0, the A=B of " so digital comparator " end output high level, the CP termination of " shift register " is received after the high level signal of A=B end of " digital comparator " the one state of " approach switch A " shift LD for the second time.
When " approach switch A " is " 0 " state, when " approach switch B " is one state, by " time delay Schmidt trigger A ", " time delay Schmidt trigger B " is input to the A1 of " digital comparator ", A0 end, A1 end is " 0 " state, A0 end is one state, because the B1 of " digital comparator " end is one state, B0 end is one state, so the A=B of " digital comparator " holds output low level, the low level of the A=B end of " digital comparator " is input to " time delay Schmidt trigger C ", " time delay Schmidt trigger C " is to " d type flip flop " output high level pulse, " d type flip flop " is by " 0 " state of " approach switch A ", " 1 " of " approach switch B " is input to the B1 of " digital comparator ", B0 end, B1 end is " 0 " state, B0 end is one state, A1 now, A0 equals B1, B0, the A=B of " so digital comparator " end output high level, the CP termination of " shift register " is received after the high level signal of A=B end of " digital comparator " the one state of " approach switch A " shift LD for the third time.The now mouth of " shift register " output high level, it is electric that " 10 seconds time delay Schmidt triggers " makes " 1KA relay coil " to obtain after the high level that obtains " shift register " mouth, obtaining the electric time is 10 seconds, " 1KA relay coil " electric after, " 1KA often opens " contact closure, switch on power to the circuit of " square wave impulse deviser " and " power amplifier ", " square wave impulse deviser " produces the square wave pulse of 1200H Z, square wave pulse is flowed through " load " to ground terminal formation loop after " power amplifier " amplifies several times." signal loor " in figure (2) is exactly the loop wire that is laid on circuit rail inner side, and the square wave pulse meeting in loop wire makes " receiving coil " of cab signal produce the induced voltage of certain millivolt amount.
When " approach switch A " again becomes " 0 " state, " approach switch B " and again becomes " 0 " state, the clear terminal output reset signal of the trigging pulse arrival forward direction " shift register " that " A, B zero state clear circuit " can be held at " shift register " CP, by the mouth zero clearing of " shift register ", guarantees that the mouth of " shift register " can not exported high level; When " approach switch A ", " approach switch B " surpass 50 seconds for one state simultaneously, " A, 50 seconds clear circuits of B mono-state time delay " exports reset signal by the mouth zero clearing of " shift register " to the clear terminal of " shift register ", guarantees that the mouth of " shift register " can not exported high level.
In figure (2), the effect of " 15 seconds time delay Schmidt triggers " and " 2K A relay " is: when time of the mouth output high level one state of " shift register " is during over 15 seconds, it is electric that " 15 seconds time delay Schmidt triggers " output high level obtains " 2K A relay coil ", " 2K A is normally closed " contact disconnects, make " 1K A relay coil " dead electricity, " 1K A often opens " contact disconnects, the cut off the electricity supply circuit of " square wave impulse deviser " and " power amplifier ", stops exporting rectangular wave pulse signal.
Equipment principle of work on car
On car, the circuit of equipment is comprised of power circuit and decision circuit two parts.
Power circuit: figure (4)
On car, equipment by the interchange 110v Power supply of locomotive, exchanges 110v power supply by " voltage transformer T1 " step-down, then after " filter rectification " obtain+5V ,+12V ,-5V ,-12V voltage.+ 5V ,+12V ,-5V ,-12V voltage are as the power supply of equipment on car.
Decision circuit: figure (3)
" the cab signal receiving coil " of locomotive front portion i.e. " front coil ", signal wire (SW) and the ground wire of " front coil " accesses respectively " isolation amplifier A ", when car is divided into preparation and is penetrated stop signal, " front coil " induces a millivolt induced voltage by the signal loor of equipment under car, " isolation amplifier A " is by complete the sending to of voltage " integrated transporting discharging A " of induction millivolt, " isolation amplifier A ", by equipment on car and " cab signal main frame " isolation, guarantees not affect the normal operation of " cab signal main frame " in addition." integrated transporting discharging A " amplifies the millivolt induced voltage receiving, then deliver to " rectifying circuit A " and carry out rectification, vdc after rectification is transported to " window comparator A " and compares with predeterminated voltage, if the vdc after rectification is greater than the lower limit predeterminated voltage of " window comparator A ", be less than the upper limit predeterminated voltage of " window comparator A ", two output lines of " window comparator A " are to " three value and gate circuit A " input high level, now, when " LKJ2000 monitor " in shunting mode " LKJ shunting mode obtains electric wire " to " three value and gate circuit A " input high level, " three value and gate circuit A " can export high level, as " time delay circuit A ", receive the high level of " three value and gate circuit A " and time reach after 0.5 second " time delay circuit A " make " 1KA relay coil " electric, the 1KA actuating of relay, " 1KA often opens " contact closure, when " disconnector " is when working position, + 110V direct current (DC) is by " plug T2 ", " 1KA often opens ", " disconnector " is switched to " urgent electropneumatic valve ", last ground connection forms loop, " urgent electropneumatic valve " energized action, make locomotive produce emergency braking.The effect of the time delay in 0.5 second of " time delay circuit A " is: the signal code that has just received the green light that ground signal sends, greenish-yellow lamp, two amber light, amber light, red light, a yellow flashing light when " front coil " in a flash, prevent " three value and gate circuit A " moment export high level cause " 1KA relay coil " electric, cause locomotive emergency braking, only have when " front coil " receives car and divide into after the stop signal and signal stabilization that preparation penetrates, the time while reaching 0.5 second " time delay circuit A " just can make " 1KA relay coil " electric.
" the cab signal receiving coil " at locomotive rear portion i.e. " rear coil ", signal wire (SW) and the ground wire of " rear coil " accesses respectively " isolation amplifier B ", when car is divided into preparation and is penetrated stop signal, " rear coil " induces a millivolt induced voltage by the signal loor of equipment under car, " isolation amplifier B " is by complete the sending to of voltage " integrated transporting discharging B " of induction millivolt, " isolation amplifier B ", by equipment on car and " cab signal main frame " isolation, guarantees not affect the normal operation of " cab signal main frame " in addition." integrated transporting discharging B " amplifies the millivolt induced voltage receiving, then deliver to " rectifying circuit B " and carry out rectification, vdc after rectification is transported to " window comparator B " and compares with predeterminated voltage, if the vdc after rectification is greater than the lower limit predeterminated voltage of " window comparator B ", be less than the upper limit predeterminated voltage of " window comparator B ", two output lines of " window comparator B " are to " three value and gate circuit B " input high level, now, when " LKJ2000 monitor " in shunting mode " LKJ shunting mode obtains electric wire " to " three value and gate circuit B " input high level, " three value and gate circuit B " can export high level, as " time delay circuit B ", receive the high level of " three value and gate circuit B " and time reach after 0.5 second " time delay circuit B " make " 1KA relay coil " electric, the 1KA actuating of relay, " 1KA often opens " contact closure, when " disconnector " is when working position, + 110V direct current (DC) is by " plug T2 ", " 1KA often opens ", " disconnector " is switched to " urgent electropneumatic valve ", last ground connection forms loop, " urgent electropneumatic valve " energized action, make locomotive produce emergency braking.The effect of the time delay in 0.5 second of " time delay circuit B " is: the signal code that has just received the green light that ground signal sends, greenish-yellow lamp, two amber light, amber light, red light, a yellow flashing light as " after coil " in a flash, prevent " three value and gate circuit B " moment export high level cause " 1KA relay coil " electric, cause locomotive emergency braking, only have when " after coil " receives car and divide into after the stop signal and signal stabilization that preparation penetrates, the time while reaching 0.5 second " time delay circuit B " just can make " 1KA relay coil " electric.
1, by the power circuit of equipment under 220V alternating current access car.
2, by the shunting signal moon white light+12V signal wire (SW) and ground wire access respectively the plug K of equipment under car.
3, the probe of " approach switch 1 ", " approach switch 2 " utilizes under car the shell of equipment to make it be horizontally fixed on the following 30mm of rail level horizon place inside rail, 2mm inside probe Edge Distance rail.
4, the shell of " equipment under car " is arranged on the stone pillow central authorities of rail by setscrew." signal loor " is laid on the following 40mm of rail rail level place inside rail, along two steel rail layings, one circle.
5, the appliance circuit of " equipment on car " is arranged in plastic casing, two aviation plugs are equipped with at the shell back side, access respectively " interchange 110v power supply ", " direct current+110v power lead ", " urgent electropneumatic valve power lead ", " receiving coil signal wire (SW) before locomotive ", " receiving coil signal wire (SW) after locomotive ", " LKJ2000 type monitor shunting mode obtains electric wire ", " cab signal main frame ground wire ", " LKJ2000 type monitoring host computer ground wire ".
Claims (2)
1. the two approach switch formulas of railway train arrangement operation prevent advancing rashly sensor, under the car of this sensor, equipment is arranged on upper and its apical side height of the stone pillow of railway line central authorities lower than rail surface horizon, it is characterized in that under car, equipment has been used two approach switchs, and discriminating direction decision circuit and signal loor have been designed, discriminating direction decision circuit is mainly by digital comparator, binary pair, register forms, signal loor is an annular electro cable of laying a circle along rail inner side, the probe of two approach switchs is fixed on the following 30mm of rail level horizon place inside rail by device housings, when locomotive comes, the investigative range that the wheel rim of wheel can enter approach switch triggers approach switch, the level signal of approach switch is transported to discriminating direction decision circuit, the order that discriminating direction decision circuit can trigger according to two approach switchs identifies locomotive operation direction, locomotive for specific run direction, pulse generating circuit can produce the impulse singla of certain frequency, after being amplified by power amplifier again, through being laid on the signal loor of rail inner side, form loop, the impulse singla of signal loor of flowing through can make the cab signal receiving coil on locomotive induce an induced voltage for millivolt level characteristic frequency.
2. the two approach switch formulas of railway train arrangement operation as claimed in claim 1 prevent advancing rashly sensor, be further characterized in that on car that equipment is mainly by isolation amplifier, two-way window comparator, binary pair, relay forms, on car, the isolation amplifier circuit of equipment is connected with cab signal receiving coil, the impulse singla that under car, equipment is launched by signal loor can make cab signal receiving coil induce the induced voltage of millivolt level characteristic frequency, on car, the window comparator of equipment is only identified as stop signal by this millivolt of level induced voltage, other induced signals are invalid signals, then by relay, the emergency vent valve by locomotive moves, locomotive produces emergency braking, realization prevents the effect that locomotive advances rashly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320106749.5U CN203472889U (en) | 2013-02-24 | 2013-02-24 | Double-proximity-switch rash-advance-preventing sensor for railway shunting operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320106749.5U CN203472889U (en) | 2013-02-24 | 2013-02-24 | Double-proximity-switch rash-advance-preventing sensor for railway shunting operation |
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| Publication Number | Publication Date |
|---|---|
| CN203472889U true CN203472889U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320106749.5U Expired - Fee Related CN203472889U (en) | 2013-02-24 | 2013-02-24 | Double-proximity-switch rash-advance-preventing sensor for railway shunting operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055892A (en) * | 2019-12-26 | 2020-04-24 | 中国铁道科学研究院集团有限公司通信信号研究所 | Railway signal acquisition information fault-tolerant method based on threshold delay processing |
-
2013
- 2013-02-24 CN CN201320106749.5U patent/CN203472889U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055892A (en) * | 2019-12-26 | 2020-04-24 | 中国铁道科学研究院集团有限公司通信信号研究所 | Railway signal acquisition information fault-tolerant method based on threshold delay processing |
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Granted publication date: 20140312 Termination date: 20170224 |
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