DE1175722B - Circuit arrangement for railway systems with electrical key locks - Google Patents

Description

Circuit arrangement for railway systems with electrical & key locks The invention relates to a circuit arrangement for railway systems with electrical Key locks, which are set locally by hand, preferably only in one end position assigned lockable switches and with three or four cable cores to the associated Control and monitoring relays are connected.

Key locks are particularly needed for smaller train stations, in those with little to be converted points on the arrangement for economic reasons electrical point machines are dispensed with. Such switches are localized by Hand made. To establish the dependency of the signals on the position of these points, Electric key locks are used, and their switching requires high security requirements must be asked. Since changing these points for shunting trips often is only required again after several days of rest, it is not enough that an operationally endangering malfunction at the latest during the next operating action makes noticeable.

Two-wire and multi-wire key lock circuits are already known. Two-wire circuits have the disadvantage that when a later becomes necessary Conversion to a point-setting operation with electric drives, new cables laid Need to become. Therefore three or four wire key lock circuits are preferred, the known points drive circuits in their structure and their essential parts are modeled and contain only one monitor for the lock state. With these Circuits have negative potential effects on the negative side of the monitor or positive potential effects on the positive side of the supervisor as well as certain Line contact in the monitoring circuit provided for checking the blocking position not immediately, but at the earliest when the next switch is changed or when it is changed Preparation noticeable. So occurs with such a disturbed key lock circuit at a later point in time - but before the next operation - another one If further faults occur, the result may be a false report; it is then z. B. After the key has been removed, a blocking message is still possible, which may be can also lead to the display of a signal in the event of an incorrect position of the points.

There is also a three-wire circuit for key locks known, in which two monitoring relays are provided, one of which is at Lock and the other when the key is released through contacts of the key release magnet is switched on. This has the disadvantage that the key lock The wire leading to the outdoor monitor does not appear when the circuit is closed Line interruption is monitored. Furthermore, in the event of an alternating current interference potential this wire is displayed in the key lock and released by removing it the key can be used before the fault is noticeable in the signal box power. In this case of malfunction, the lock monitor remains until it is removed of the key is excited by direct current flowing in both half-periods, while the outdoor monitor, which is also rated for direct current, only pulsates direct current receives and remains in the fallen position.

According to the invention, these disadvantages of the known key lock circuits in this way avoid the need for two quiescent current supplied to monitor the key lock position Monitoring circuits are arranged, the monitoring relays of which are sequence-dependent address one after the other, and that with the key lock in a manner known per se a protective switching means is arranged in each of the monitoring circuits whose ineffectiveness the associated supervisor changes to the malfunction situation. as Protective switching means are ohmic resistors advantageous if their resistance values and those of the monitoring windings are dimensioned in such a way that when there is line contact (Short circuit of the protective switching means) and interference potential influence the fuses the monitoring circuits are destroyed. The melting thickness of this on the The plus and minus sides of the monitoring circuits can be arranged in such a way be dimensioned so that they are approximately equal to the steady-state monitoring current strength is. It is it is also possible to use blocking cells instead of ohmic resistors to arrange. In this case, alternating current instead of direct current must be used for feeding the monitoring circuits are used. Through the valve cells that are connected to the Lock monitoring contacts of the key lock are connected in series, only works an intermittent direct current is applied to the monitoring relays. The power supply gaps are thereby through capacitors, which are connected in parallel to the monitors, covered. With regard to an immediate marking of line contact is it is advantageous to have the blocking cells in the two monitoring circuits with opposite polarity insert and feed them from the same power source.

In the case of unoccupied stations, especially remote-controlled stations, it is an advantage to have an emergency release for remote control faults to arrange the key locks. Circuit arrangements according to the invention offer this a particularly cheap option; because without additional cable cores can be achieved be that by an emergency release button in the key lock one of the normal Work sequence of the supervisors deviating from the shutdown of at least one supervisor initiated and thereby switched on an emergency release relay in the control unit will.

Some embodiments of the invention are in the drawings and explained in more detail below. In the drawings are for each other the same reference numerals have been used for corresponding circuit parts.

The illustrated and explained subjects of the claims 2, 3 and 7 and 9 to 11 should only be used together with the circuit arrangement according to claim 1 Enjoy patent protection.

F i g. 1 shows a four-wire key lock circuit in which two ohmic resistors R 2 and R 3 are arranged as protective switching means in the housing of the key lock (below the dash-dotted line). In the illustrated blocking state of the circuit, the first monitor 20 with the contacts 21 to 23 and the second monitor 30 with the contacts 31 to 33 are connected via the contacts 61 and 62, which are controlled by the armature of the key blocking relay 60 and report its blocking position. The first supervisor 20 is excited in the circuit P-91-41-3-8 2-61-4-11-20-93-M and closes the circuit P-92-42-1-8 3-62 with his contact 21 -2-21-30-93-M of the second monitor 30. The existence of the blocking position is in the control station, z. B. in a bar table, indicated by the indicator lamp L 5 switched on in the circuit 95-32-44-L5, for example with white continuous light. Any change in this state, which causes the armature to drop off on the upper watcher 30, is signaled with a flashing light by the signal lamp L 5 switched on in the circuit 96-33-44-L 5. In the monitoring circuit, the ohmic resistance values of the windings of the two Oberwacher 20 and 30 and the two protective resistors R 2 and R 3 are dimensioned so that if there is contact between lines 1 and 2, 3 and 4, 1 and 4 or 2 and 3 through the occurring current increase at least one of the fuses 91, 92 and 93 blows. The same effect also occurs when positive or negative potential is applied.

To control the key lock, a key release switch is provided which is provided with a response and holding winding 10.1 as well as with an opposing disconnect winding 10.2 and controls the contacts 11 to 18. In addition, a release relay 40150 designed as a backup relay with contacts 41 to 44 and 51 to 54 is arranged. The response of these relays and the blocking relay 60 depends on the contacts 97 and 98, which are controlled, for example, by route closers or fixers for routes via the switch to be locally locked and are only closed when the route is not set.

To release the key lock, contact T 1 of a switch group key and contact T4 of a key release key are actuated. Then the enable switch responds via its winding 10.1 in the circuit P-94-98-T 1-T 4-10.1-M. The release switch opens the circuit of the first monitor 20 with its contact 11 , which interrupts the circuit of the second monitor 30 with its contact 21 when it drops. When the monitor 30 drops out, the circuit P-94-98-T 1-T4-13-31-22-40-M of the active control winding 40 of the release relay 40/50 is closed, so that this is switched over. By closing the contacts 51 and 52, the response circuit of the blocking relay 60 is prepared. The key release is indicated on the key lock by the signal lamp L 6, which is fed in the circuit P-94-97-10.2-51-3-5 6-L 6-R 3-1-52-M. If the indication of the key release by the signal lamp L 6 should prove to be insufficient in practice, a simultaneously switched acoustic alarm, e.g. B. od a horn. Like. Be provided.

In the control station, the extinguishing of the locking signal lamp L 5 and the lighting of the key release signal lamp L 4 connected to the circuit 94-17-L 4 with a red flashing light indicates that the operation of the buttons mentioned was successful and that they can be released again. After the contacts T 1 and T4 have opened, the enable switch remains excited via its winding 10.1 in the circuit P-94-98-12-53-10.1-M. Its armature remains attracted, although its drop winding 10.2 also receives current, since contact 16 is open. However, this current is limited by the signal lamp L 6 and the resistor R 3 and is only small. As long as no use has been made of the issued key release, the key release can be withdrawn again by closing the contact T1 of the turnout group key and the contact T5 of the key release / delete key. In this case, the reset winding 50 is switched on in the circuit P-94-98-T 1-T 5-14-43-50-M, so that the release relay 40/50 returns to the basic position shown.

If the release is used, the key will be blocked the unlock button with contact T 6 is pressed. Then flows in the circuit P-94-97-10.2-51-3-60-T 6-1-52-M through the drop winding 10.2 a current so large that the armature of the release switch is thrown off and the contacts 11 to 18 again assume the position shown. The flashing light of the release indicator lamp L 4 changes to steady light because the lamp is now switched on in circuit 95-18-54-L 4. With contact 16 of the release switch its drop winding 10.2 is short-circuited. In the key lock, the pulls Closing the contact T6 the blocking relay 60 to its armature. Then she can't Key lock disc shown are rotated until the key to Withdrawal becomes free. In this position, the locking disc prevents the armature from falling off of the blocking relay.

The relay windings 10.2 and 60 can also be dimensioned in such a way that that the flowing through the drop winding 10.2 when the contact T 6 is closed The current is not yet sufficient to trigger the blocking relay. In this case, pulls the blocking relay 60 is only activated when the armature of the release switch has dropped out again and contact 16 is closed.

When the maneuvering movements have ended, the key is in the key lock inserted back and the locking disc turned back, the armature of the locking relay falls 60 off again. As a result, the contacts 61 and 62 close again. The first supervisor 20 is then excited in the circuit P-94-97-16-51-3-R 2-61-4-11-20-93-M. By closing of its contact 23, the circuit P-94-98-23-15-43-50-M is closed and the Enable relay 40/50 reset. Then the first supervisor 20 receives over the fuse 91 and the contact 41 continue to power. For the second supervisor 30 the circuit described for the basic position of the circuit then exists again.

The reset current branch that can be switched on via contact T5 of the release cancel button and the reset current branch that can be switched on with contact 23 are switched through by contact 14 or 15 of the release switch, depending on the operating position. As long as the unlock button has not been pressed, so as long as the armature of the release switch is attracted, the relay 40150 can be reset via contact 14 by simultaneously closing contacts T 1 and T 5, thus canceling the release. If, on the other hand, the key has been removed, the release switch is back in its basic position. Then it is only possible to automatically reset the release relay 40/50 via the contacts 23 and 15 by re-setting the key. Here, the self-holding circuit for the winding 10.1 of the release switch is interrupted by the contact 53.

To in remote-controlled systems with temporarily unmanned stations the key release can also be triggered by a remote control command Contact F4 is provided parallel to the series connection of contacts T 1 and T4, which is closed for a short time by a command receiving relay not shown will. In a corresponding manner, the series connection of the contacts T1 and T5 a contact of a receiving relay for extinguishing commands can be connected in parallel. If the contact T6 exists when the illustrated blocking state of the circuit arrangement closed, the blocking relay 60 cannot respond because its winding is over the wires 1 and 3 are at points of the same potential (from the power source connection P). His response is only possible when the contacts 42 and 52 are folded over, whereby wire 1 is connected to the potential of connection M.

F i g. 2 shows a circuit arrangement in which, in normal operation, the key located at the key lock does not have to be operated to release the key. If a release is given, the blocking relay 60 responds and releases the blocking disk. The key can therefore be turned freely and removed without additional button operation. The button located next to the key lock is only intended as an emergency unlock button for those cases in which a release cannot be given, for example due to remote control malfunctions of unmanned control stations. The button is sealable or designed as a key button and controls the changeover contact T60. An emergency release relay 70 is provided in the control station, which can be activated as required by turning over the contact T60 of the emergency release button. The emergency release relay 70 controls the contacts 71 to 77 and is always only switched on temporarily so that the emergency release can only exist for a short time. The emergency release relay 70 has an armature dropout delay sufficient to remove the key.

Another special feature is shown in FIG. 2 with the circuit of the release relay 40/50. Its status change is controlled by the same contacts for setting the release position and for resetting to the basic position: so only one status change command is ever given: If, for example, the changeover is triggered on a train station table, contact T4 is sufficient in addition to contact T1 of the switch group button a key lock control button that is used as an unlock button and a reset button. Here, too, the contact F4 of a receiving relay for remote control commands can be provided in place of the two button contacts. In order to ensure that the release relay 40/50, which is designed as a backup relay, changes its state properly with each change command, in addition to FIG. 2 a reset switch 80 is provided which controls the contacts 81 to 84: The key release switch 10 is only provided with one winding here. Otherwise, the mode of operation of the circuit according to FIG. 2 essentially corresponds to that according to FIG. 1. When a status change command is received, contact F4 of a corresponding command reception relay is temporarily closed. In the illustrated blocking state of the circuit, the switch 10 in the circuit P-94-97-F 4-53-84-10-M is excited and switches off the first monitor 20 with its contact 11, and the monitor 30 with its contact 21 turns off. By closing the contact 110 of the switch 10 and the contact 34, the emergency release relay 70 is switched on. Its contacts 76 and 77 switch off the continuous white light of the signal lamp L 5 and the red flashing light of the signal lamp L 4 on. When the contact 75 closes, the active control winding 40 in the circuit P-94-97 F 4-12-13-31-75-40-M is excited and the release relay 40/50 is brought into the release position. The operational capability of the emergency release relay 70 is checked in this way with each release. The circuit of the reset winding 50 and the reset switch 80 is opened by the contact 15 until the contact F 4 opens again and the release switch 10 switches off again. The release relay 40150 switches on the locking relay 60 in the circuit P-94-97-51-3-60-5 6-1-52-M via its contacts 51 and 52 in its release position for the key lock. The response of the blocking relay 60 is indicated by the lighting of the indicator lamp L 6, for which the contact 63 closes the branch L 6-R 6-63. In the control station, the release signal lamp L 4 in the circuit 95-54L 4 is switched on by the contact 54 and the blocking signal lamp L 5 is switched off by the contact 44. The contacts 22 and 45 switch off the emergency release relay 70 .

If the key removed for a maneuvering trip has been properly reinserted into the key lock, the illustrated basic position of the circuit can be restored using the same remote control command. When the contact F4 closes, the reset switch 80 in the circuit P-94-97-F4-43-15-80-M responds and switches the reset winding 50 of the release relay 40/50 on with its contacts 81 and 82. The contact 83 prevents the emergency release relay 70 from responding. The contact 84 blocks the response circuit of the release switch 10 until the reset switch 80 has returned to the rest position after the contact F4 has opened. The two monitors 20 and 30 respond after the release relay 40/50 has been reset to the basic position. If the key is not in the key lock when the remote control command is received, the two monitors 20 and 30 will not respond until the key has been reinserted into the lock and fixed. The same switching processes can be triggered by simultaneous closing of the button contacts T 1 and T 4 instead of the contact F4. If the remote control device malfunctions during operation with unoccupied stations, the emergency release button with contact T60 can be actuated after loosening a seal or using a key that the train attendants have with them. As a result, the monitor 30 is switched off. When its armature drops, the emergency release relay 70 in the circuit P-94-97-22-34-83-45-70-M responds, the relay in the circuit P-94-97-72-41-11-3-60-S 6 -1-19-74-M switches on the blocking relay. This switches off the first monitor 20 with its contact 61 , which, after its drop-out delayed by the capacitor C2, interrupts the response circuit of the emergency release relay 70 with its contact 22. The monitors 20 and 30 thus work in the reverse order in the case of an emergency release as in the normal release. The emergency release relay 70, which is delayed by the capacitor C7 charged via the resistor R7, returns to the basic position shown, for example 3 seconds after the contact T60 is closed. If the key has been removed, the contacts 61 and 62 remain open. The two monitors 20 and 30 can only respond again when the key has been set again. Even with the circuit according to FIG. 2 it is necessary to reverse the polarity of the potential on wire 1 in order to respond to the blocking relay 60.

In Fig. Figures 3 and 4 show key lock circuits with only three lines between the key lock and the control station. Only the circuits of the blocking relay 60 and the monitoring relays 20 and 30 are shown here. In these circuit arrangements, the blocking relay 60 can only respond if its control lines are fed with a type of current that differs from the monitoring current.

In the case of the one shown in FIG. 3, the three lines are monitored by means of direct current, while alternating current is used to control the blocking relay 60, which is supplied by the power source RIO. With a view to a high level of operational reliability, the blocking relay 60 is connected to the lines 1 and 3 via a converter W 6. The circuits, not shown, of the release switch (of which only the winding 10.2 is shown in FIG. 3) and of the release relay 40/50 and the indicator lamps L 4 and L 5 correspond to those according to FIG. 1.

In the basic position shown, both monitors 20 and 30 are connected in parallel to line 2 and in the circuit excited. When the enable switch 10 and the enable relay 40150 are in the enabled position, the circuit R-94-97-10.2-51-3-C 6-W 6-1-52-0 is closed for the primary winding of the converter W 6. The indicator lamp L 6 connected to the secondary winding of the converter lights up. When the contact T6 of the unlock button closes, the locking relay 60 , which is also connected to the secondary winding, responds. The current flowing in the winding 10.2 here resets the enable switch (as described in FIG. 1). The rest of the workflow corresponds to the execution according to FIG. 1. The signal lamp L 6 can also be switched into the circuit of the primary winding of the converter. The capacitor C 6 in the primary circuit is arranged as a block for the monitoring direct current.

In the case of the one shown in FIG. 4 is an alternating current monitor of lines 1 to 3 and a direct current control of the blocking relay 60 is provided. The circuits of the control relays and the indicator lamps, not shown, are the same as in the circuit according to FIG. 2.

In this circuit, instead of the protective means shown in FIG. 1 to 3 shown ohmic resistors R 2 and R 3 blocking cells S 2 and S 3 angeord-. advised so that the two monitors 20 and 30 are energized with intermittent direct current from the AC power source R / S. The power supply gaps for monitors 20 and 30 cover capacitors C2 and C3; the capacitor C2 has the larger capacitance in order to ensure the additional drop-out delay required for the emergency release relay 70 (FIG. 2). The two valve cells S2 and S3 are inserted into the circuit with opposite polarity in order to feed the two monitoring current branches with opposite half-waves from the alternating current source R / S. This results in a better display of wire contacts between cable wires 2 and 3. The blocking relay is provided with three windings 60.1, 60.2 and 60.3. The two windings 60.1 and 60.2 are inserted into the monitoring circuit in such a way that the effects of the partial currents of the monitoring current flowing in them cancel each other out. For example, the partial current flowing in one half-wave in branch S2-60.1-2 is compensated by the partial current that flows in branch S 2-C 6-60.2-2 via capacitor C6 connected in parallel to both windings 60.1 and 60.2. In addition, the voltage drop across the monitors 20 and 30 prevents the windings 60.1 and 60.2 from responding.

When the control relays are released, the two are in series windings 60.1 and 60.2 lying in the same direction in the circuit P-94-97-51-3-61-52-60.1-60.2-T60-S 3-62-1-52-M excited. At the same time, the capacitor C 6 is charged. Has the blocking relay the contacts 61 and 62 open, so the windings are due to the discharge current of the capacitor C 6 excited. When the contact 63 closes, the winding 60.3 and the lamp L 6 is fed with a direct current from the power source P / M.

If the emergency unlocking button is pressed, its contact T60 switches the Supervisor 30 off. After its armature has dropped, the emergency release relay responds, that with its contacts 72 and 74, the lines 1 and 3 to the DC voltage source P / M sets.

As a key release relay, instead of a backup relay, a toggle relay or a self-closing relay can be used. It is also possible, four-wire versions according to the F i g. 3 and 4 with AC control and / or to provide alternating current monitoring and three-wire versions those for controlling the locking relay and for monitoring the lines have the same type of current is used. The use of double monitoring with one after the other is essential here responsive monitors that avoid the disadvantages that arise resulting from the doubling of contact, in particular due to the possible contact disturbances, which are not noticeable. Also a perfect emergency release without additional effort of lines is for key locks only when using circuits with more possible as a supervisor, because with such circuits those of the normal Working sequence deviating working method for switching on an emergency release relay can be used.

In the context of the invention, the key lock circuits should also be described type lie in which by the monitors 20 and 30 one in one Local circuit connectable collective monitor is controlled.

Claims (17)

Claims: 1. Circuit arrangement for railway systems with electrical key locks, which are assigned locally by hand, preferably only lockable in one end position, and are connected with three or four cable cores to the associated control and monitoring relays, characterized in that two for monitoring the key lock position Quiescent current-fed monitoring circuits are arranged, the monitors (20 and 30) respond one after the other depending on the sequence, and that in the case of the key lock in a known manner in each of the monitoring circuits a protective switching means (resistors R 2 and R 3 in Figs. 1 to 3; blocking cells S. 2 and S 3 in Fig. 4) is arranged, when it comes into effect, the associated monitor (20 or 30) changes to the malfunction situation. 2. Circuit arrangement according to claim 1, characterized in that ohmic resistances are used as protective switching means (R 2 and R 3 in Figs. 1 to 3) are arranged and the resistance values of each protective resistor and the winding of the monitor (20 or 30) lying in series therewith dimensioned in this way are that in the event of line contact or due to the effect of interference potential with failure a protective resistor a current rise comes about through which at least one the fuses (91, 92 or 93) of the monitoring circuit is destroyed. 3. Circuit arrangement according to Claim 1, characterized in that the protective switching means a valve cell in each of the two monitoring circuits at the key lock (S2 and S3 in Fig. 4) and that the from an alternating current source (RIO) powered monitoring circuits monitor (20 and 30) on intermittent Address direct current and each through a capacitor connected in parallel to them (C2 or C3) are delayed. 4. Circuit arrangement according to claim 1 and 3, characterized in that the same for feeding the two monitoring circuits AC power source (R / S) and oppositely polarized valve cells (S2 and S3) are provided are. 5. Circuit arrangement according to claim 1, characterized in that that the branches of the locking relay (60) arranged at the key lock are so are designed that the locking relay in the locked state of the circuit between two Points of the same potential (wire 1 and 3) of the two monitoring circuits are located, while when the key is released, the potential of one of the two points (e.g. B. Core 1) changes compared to that of the other point. 6. Circuit arrangement according to Claim 1, characterized in that a key release switch (10) with two windings (10.1 and 10.2 in FIG. 1) are provided, one of which (10.1) serves to keep him excited in self-determination until he is through the other, with the Locking relay (60) in series winding (10.2) is reset, which is at short-circuited key release switch that is not energized by an internal contact (16) is. 7. Circuit arrangement according to claim 1, characterized in that for switching on the control cores (1 and 3) of the blocking relay (60) is designed as a backup relay Key release relay (40/50 in F i g. 1 and 2) is arranged, whose active control circuit (Winding 40) is provided for checking the falling of the monitors (20 and 30) is. B. Circuit arrangement according to claim 1., Characterized in that for automatic Switching on the reset circuit (winding 50) of the key release relay (40/50) when the locking relay (60) drops out by reinserting the key into the key lock a working contact (23 in FIG. 1) of the monitor (20) responding to this is provided is. 9. Circuit arrangement according to claim 1 and 8, characterized in that im Circuit of the reset winding (50) of the key release relay (40/50) contacts (T5) od enable delete keys. The like. Are arranged. 10. Circuit arrangement according to Claims 1 and 6 to 9, characterized by a working contact (14) of the key release switch (10) in series with the contact (T5) of the release button and a break contact (15) of the enable switch in series with the contact (23) of the supervisor (20) in the circuit of the reset winding (50) of the key release relay. 11. Circuit arrangement according to claim 1 and 6 to 9, characterized in that a contact (53 in F i G. 1) of the key release relay (40/50) to interrupt the self-closing circuit of the key release switch (via winding 10.1) when clearing the release is provided. 12. Circuit arrangement according to claim 1 and 7, characterized in that the same switching means (contacts F 4 or T 1 and T4) are provided for triggering the change of state of the key release relay (40l50) when issuing and deleting the release, and that for selecting the winding to be connected (40 or 50) of the key release relay each has a contact (13 or 83 in FIG. 2) of the key release switch (10) and a reset switch (80), of which only one (10 or 80) can respond via a corresponding contact (53 or 43) of the key release relay. 13. Circuit arrangement according to claims 1 and 5, characterized in that there is an emergency release relay in the control station (70 in F i g. 2) is arranged that when a contact (T60) is actuated a at the key lock arranged emergency unlocking button by a contact (34) of the falling monitor (30) is switched on and with its contacts (72 and 74) the change in potential required to respond to the blocking relay (60) the control cores (1 and 3) for a specified time. 14. Circuit arrangement according to claim 1, 5 and 13, characterized in that the other monitor (20) a greater drop-out delay than that which switches on the emergency release relay (70) Supervisor (30) is assigned and that a break contact (22) of the other supervisor (20) is provided to limit the switch-on time of the emergency release relay. 15. Circuit arrangement according to claim 1, 5. 13 and 14, characterized in that in the circuit of the emergency release relay (70) parallel to the normally closed contact (22) of the longer drop-out delayed monitor (20) a working contact (16) of the key release switch (10) and in series with the said break contact (22) is a break contact (83) of the reset switch (80) and a contact closed when the key release relay (40/50) is in the basic position (45) are arranged. 16. Circuit arrangement according to claim 1, 5 and 13 to 15, characterized in that in the circuit of the active control winding (40) of the key release relay (40/50) a normally open contact (75) of the emergency release relay is arranged. 17. Circuit arrangement according to claim 1, characterized in that all of the connections of the monitoring circuits connected to the monitoring current are routed via fuses (91 to 93). Considered publications: German Patent Specifications No. 936 807, 1016 293.