DE1103378B - Circuit arrangement for electromagnetic key locks for manual operating equipment in railway signal systems - Google Patents

Description

Circuit arrangement for electromagnetic key locks for hand-operated Operating equipment in railway signal systems The invention relates to a Circuit arrangement for electromagnetic key locks locally by hand adjustable operating facilities., z. B. switches, track barriers od. Like., Which are preferably be locked in a certain operating position by hand locks and their Keys in electric key locks are set to electromagnetically to monitor the existing lock electrically or to release it if necessary.

Such devices are used, for example, for interlockings or Signal systems are used in which one or more overtaking, Branch tracks or sidings or the like. are arranged. The ones that can be set there by hand Points are in regular operation, e.g. B. in self-block operation, for train journeys on the continuous line track locked by hand locks and can be used for journeys can only be moved to the overtaking, branching or siding tracks if from a signal box, a supervisory post or the like, the required conversion clearance, d. H. the release of the associated specified in an electric key lock Key, is made. The key removal is usually after pressing a button preferably arranged in the key lock housing is possible. at taken from the key is the signal dependency on the associated route section lifted, and the signals show stop, so that the shunting department to the individual Junction points or the like. Can drive. The turnout to be driven on in the minus position is unlocked and relocated under the key.

The key locks are controlled via cables or overhead lines and monitored, with special security conditions, e.g. B. the recognizable or Ineffective line short circuits, line interruptions, interference voltages or the like, must be taken into account. So far these are indispensable Safety requirements for each manually operated branch switch, one electrical Key lock with its own connection lines and its own control and monitoring device has been provided. This led to a lot of effort, especially for those systems where the branches to be switched by hand are at a greater distance from a signal box or among each other.

According to the invention, this effort can thereby be significantly reduced that for controlling and monitoring several hand-held operating devices, or the electromagnetic key locks assigned to these operating devices a common control and monitoring device as well as a common two or multi-core control and monitoring line is provided over which the Lock state of one assigned to all key locks or operating devices Key is monitored and the key can be released.

The subject of the invention and further features of the invention are explained in more detail below using an example: Fig. 1 shows a circuit arrangement for controlling and monitoring electromagnetic key locks R 1, R 2 and R 3, which the locally manually adjustable points W l, W2 and W 3 are assigned in the track plan according to FIG. These switches are arranged on a continuous track DG connecting the stations X and Y and are required for shunting or auxiliary trips to the sidings or sidings 1, 2 or 3. In regular operation, e.g. B. in an automatic block operation; the turnouts WI to W3 are locked with hand locks in the plus layer. A common key for the locks of these points is in, another z. B. in the station Y arranged key lock Ry electromagnetically set. The locked position of the key is held by a z. B. arranged in the station X and shown in Fig. 1 monitoring device Tr, C, U checked, in a known manner in that a relay U arranged in the monitoring circuit is fed via a transformer Tr and a rectifier Gy with intermittent direct current. This circuit leads via the switching means and lines TY-Stl-11-R11-21-R21-31-R31- 41-Wiy-Ryl-Gy-42-R32-32-R22-22-R12-12-St2-U- Tr. The relay U is electrically supported during the current breaks by a capacitor C connected in parallel and is practically short-circuited via this when it is exposed to alternating voltage. As a result, not only is every break in the two-wire line 11, 12 or 21, 22 or 31, 32 or 41, 42, but also every wire contact immediately noticeable through a fault display on the monitoring relay U. A key locking contact Ry 1, which is closed in the locked position and which is arranged with the rectifier Gy in series and parallel to the switched-off working winding of the key lock Ry, is decisive for the lock monitoring of the key. The key is released in a known manner by a control device St arranged in the station X, via which a direct voltage from the current source 111, P is connected to the two-wire line by switching over the control contacts St3 and St4. The control contacts Stl and St2 interrupt the monitoring circuit of the relay U. The key release is switched ineffective after pressing the keyTy. Here, the working winding of the key lock Ry in the circuit P-St-St3-11-R11-21-R21-31-R31-41-Wiy-Ry-Ty-42-R32-32-R22-22-R12-12-St4 -St-1V1 energized. The anchor of the key lock Ry attracts and is mechanically supported after the key has been removed. The circuit is expediently designed in a known manner in such a way that each shunting release can only be used for one key removal. The key can only be used to remove the hand lock on each of the turnouts W1, W2 or ff-3, so that they can be switched to the minus position. The key lock contact Ryl is opened after the armature is tightened, so that the monitoring relay U remains switched off even after the contacts Stl to St4 have been reset. Pressing the button Ty again or holding it in the active position also has no effect, since the monitoring relay U does not respond to AC voltage supply or is practically short-circuited by the capacitor C.

If a shunting trip in the track plan according to FIG. 2 from the station Y z. B. take place in the siding 2, after reaching the switch W2 with your released key, the existing lock for the plus layer is eliminated. Then the switch lt'2 is switched to the minus position. After the switch W5 has also been placed in the correct position, the shunting department can enter siding 2. Once the entrance has been completed, the switch W2 and the protective switch TY 5 can be brought back into the plus position and locked in this position. An operational advantage is that the released key can now be set in the key lock R2, which is located in the vicinity of the switch W2. After inserting the key, the mechanically supported armature of the key lock R2 is brought into the dropped position, ie into the locked position.

According to a further feature of the invention, the key lock R2 is now connected to the monitoring and control device Tr, C, U, St via the common two-wire line 11, 12 and 21, 22 through contacts R23 and R24, preferably the unused one for the key lock Ry leading part of the continuous control and monitoring line is switched off by contacts IZ21 and R22. The reactivation of the relay U can be made dependent in a known manner on the sending of a switching indicator (e.g. a certain type of current, pulse sequence, frequency or the like).

However, when practicing the invention, the Contacts R 11, R 12 and R 14 operated by the armature of the key locks or R21, R22 and R24 or R31, R32 and R34 can be omitted. In this case do there is even line contact in the one not used for the monitoring current Part of the continuous control and monitoring line immediately noticeable (e.g. by dropping out of relay U).

By switching contacts R23 and R24, the monitoring circuit Tr - Stl - 11 - R11 - 21 - Wd2 - R23 -G2-R24-22-R12-12-St2-U-Tr is closed and the relay U picks up again. This also removes the blocking of regular train operations. The train located in siding 2 can only vacate this track after a new shunting clearance, i.e. after the key lock has been lifted again. For this purpose, the monitoring circuit must be interrupted again by the control contacts Stl and St2 and the key lock R2 connected to the direct current source P, 117 via the control device St, the contacts St 3 and St 4 and the line 11, 21 or 12, 22. After pressing button T2, the working winding of the key lock R2 is energized; their anchor attracts and is mechanically supported again. This releases the key and the switch W2 can be unlocked and switched to the minus position. After the train has left the siding 2, the switch W2 is put back into the plus position and locked, and the key that has become free can now be used for further shunting or switching operations. Auxiliary trips to siding 1 or 3, d. 1i. to be used to switch points W 1 or W3. When the shunting or auxiliary train journeys have ended, the key is again set in the key lock Ry arranged in station Y.

In the practical application of the invention, it is not absolutely necessary to fix the key in a special key lock arranged in a train station or in its signal box after the end of the maneuvering or auxiliary journey, so that this can also be dispensed with. On the other hand, each of the two stations X and Y can be assigned a special key lock, in which the key can then be specified, even with appropriate operating conditions. It is of further operational advantage if signaling devices are assigned to each key lock, which indicate the locked position and that the key is free. The resistors Wi 1, Wi 2, Wi 3 and Wiy connected upstream of the key locks R 1 to R 3 and Ry serve as balancing resistors for the different cable lengths.

For the application of the possible with the circuit arrangement shown Method can be used in place of a two-wire version, for. B. also a three or four-wire key lock circuit can be used. It is only essential here, that a common control and monitoring device for several key locks is provided and that all key locks to set one all to be locked Operating devices associated with the common key are used. The here resulting operational advantage of the change of restricted location is independent on the type of key lock circuit. One can use any of the for backup individual hand-made operating devices known or possible key lock circuits expand to a circuit arrangement according to the invention. A major advantage the invention is that any number of key locks to a common Control and monitoring device are connected in parallel, each of which only one can be brought into the blocked position. The for this from signaling technical Reasons required mutual exclusion between the individual key locks for reaching the blocking position at only one barrier is through the use of a common key.

Claims (5)

PATENT CLAIMS: 1. Circuit arrangement for electromagnetic key locks in locally manually adjustable operating equipment, e.g. B. switches, track locks or the like. Which are preferably locked in a certain operating position by hand locks and whose keys are electromagnetically set in electrical key locks to monitor the existing lock electrically or, if necessary, to release, characterized in that for controlling and monitoring several hand-made. Operating devices (switches W 1 to W3) or the electromagnetic key locks (R1 to R3) assigned to these operating devices have a common control and monitoring device Jr, U, C, St) and a common two-core or multi-core control and monitoring line is provided, via which the locking state of a key assigned to all key locks or operating devices is monitored and the key can be released. 2. Circuit arrangement according to claim 1, characterized in that not only each hand-operated operating device assigned an electromagnetic key lock is, but also other key locks (Ry, e.g. on the neighboring Stations) are arranged to have the common key associated with all Establish operating devices separately. 3. Circuit arrangement according to claim 1 or 2, characterized in that the connection of each, but only one of these key locks (R1, R2 or R3) with the common control and monitoring device Jr, U, C, St) by closing only in the locked position Key lock contacts (R14, R24 or R34) is conveyed. 4. Circuit arrangement according to claim 1, characterized by the arrangement of control contacts (St l and St 2 or St 3 and St 4) for the optional connection of the common key lock connection line (11, 12 or their continuations 21, 22 or 31, 32 or 41, 42) to a common monitoring device Jr, U, C) or to a common control device (St with .den contacts St 1 to St 4). 5. Circuit arrangement according to claim 1, characterized in that in the connection lines to the operating facilities (R 1 to Ry) adjustable balancing resistors (Wil to Wi3 or Wiy) are arranged. Considered publications: German Patent 1Tr. 1016 293.