Signal system for protecting a single-track route section

The invention relates to a signaling system for securing a single-track section which is subdivided into a plurality of blocks secured with signals, wherein at the Btockgrenzen ever two a rail vehicle detecting, a pair of donors are arranged at a small distance from each other, and each encoder controls a signal and each of these pairs of encoders is associated with the order of the 5 response of the encoder and thus the direction of travel of the rail vehicles detecting circuit.

Be usual double track railway lines, the individual routes are divided into blocks, which are secured by appropriate encoders, which control signals. In this case, the signal of the respective upstream block is only released again when the block has already been left by the passing rail vehicle.

In single-track routes, especially if such arise due to Baiarbeiten, however, considerable difficulties arise because just the fuse must respond to both directions and in particular a collision must be prevented.

By DE-OS 32 43 700 a signal system of the type mentioned was proposed at 75 which also two encoders are provided at the boundaries of each section, which is associated with the direction of travel of the rail vehicle detecting circuit Bel of this known solution, however, only then Section will be shown as FREE if a train already enters the next but one section. However, this leads to a corresponding slowdown of the possible train sequence.

OBJECT OF THE INVENTION Is it a signal system of the type mentioned above that is used in the past. which is characterized by a simple Aulbau and can also be used on construction sites and in which a rapid train sequence is possible.

According to the invention, this is achieved by that the circuit detecting the direction of travel of the rail vehicles each activated a donor acted in the direction of entry, with an output connected to a count-up input of an associated counter dialing and a further one activated in the exit direction of the rail vehicles, is connected to a down counting input of another counter circuit, whose up-counting input with the second, the direction of travel of the rail vehicle detecting circuit is connected wherein each of the direction of travel of the rail vehicles detecting circuits is associated with a counter circuit and these emit a signal at their outputs at a deviating from a predetermined value nen counter reading and these outputs are connected on the one hand via an AND link to the reset input of a flip-flop circuit . whose output in the reset state is two, preferably in the middle region of the block in an appropriate speed in this block corresponding distance arranged emergency signals or emergency stop devices in the sense of HALT "control and the weiters ie control a arranged at the block boundaries ss signal and that the block is divided into sub-blocks, at the borders of which pairs of detectors detecting rail vehicles are arranged, soft pairs are each associated with the order of the response of the encoder and thus the direction of travel of the rail vehicles detecting circuit each activating one with encoders applied in the direction of entry, having an input each associated with a flip-flop associated output and the other in the exit direction 40 of the Schienenfohrzeuge activated outputs of the direction of travel of the Schienenfohrzeuge detected Scha at an OR circuit with the other two entrances of the two flip-flops Schaitungert are connected . whose outputs are connected via an AND connection with two signals arranged at the boundaries of the subblock.

In this way, it is possible to avoid a collision with each other due to errors in the train sequence movements of two 45 Schienenfohrzeuge against each other, since in this case an automatic barrier of the route through the block arranged emergency signals, or caused by the emergency stop facilities and the signals located at the boundaries of the subblocks, this is conditioned by the circumstance in the case of a rail vehicle retracting into the secured block at a time when an opposing railroad tool is in the secured block, so both Zählersdialtungen increase their count and therefore give off signals at their outputs, what just subsequently to a halt of the two distress signals to HALT, or. to an activation of

Emergency stop facilities leads.

On the other hand, it comes with the Normalbstrieb, in which only in one direction leading rail vehicles pass the block, to no activation of the emergency signals or the emergency stop device, since just 55, although the counter corresponding to in the direction of entry of a rail vehicle responsive donors increased by 1 but appealing in Ausforehrtrichtung, at the end of the block located in the exit direction of the relevant rail shuttle, the pair of donors is again reduced by 1, whereby the initial state is restored. By using counter circuits

AT 397 792 B is also sichergesteilt that several rail vehicles can learn in the same direction in the secured single-track section, without causing a blockage of the route

Such blocking only occurs for a rail vehicle entering from the opposite direction.

Another backup of the block is given by its subdivision into sub-blocks, at whose borders also signals are arranged. Here, when entering a rail vehicle in a sub-block the two engeordneten at its ends signals are set to HALT and returned to the extension of the rail vehicle from the relevant sub-block back to FREI, whereby a corresponding safety distance between two moving in the same direction rail vehicles is ensured.

According to a further feature of the invention can be provided that the emergency signals controlling the flip-flop circuit can be set only via a manually operable switch, which is preferably accessible only after overcoming a lock.

In this way, it is sure that the distress signals or the emergency services of the line can only be reset after they have been cleared by an authorized person.

Furthermore, it can be provided that the outputs of the two Zählschaitungon are connected via a manually operable two-pole switch, each with two arranged at the block ends signal.

By these measures, it is possible to synchronize the two arranged at the ends of the block signals with each other, or brought into a defined position during commissioning of the signal system.

In a preferred embodiment it is provided that the outputs of the counter circuits are further connected via an OR gate with a Blinkschaitung whose output is connected to the emergency signals

In this way, a functional check of the system, at least with regard to their activation is possible. Thus, it follows that when retracting a rail vehicle in the block of one of the two counters abgibi a signal at its output and therefore the Blinkschaitung via the connected to the outputs of both counter circuits OR gate is activated. The flashing emergency signals are then a sign that the signaling system is in operation.

Furthermore, it can be provided that arranged at both ends of the block. At the same time, donors who track the rails also act as donors for the sub-blocks at the edge.

These measures result in a simplification of the structure of the signal system.

The invention will now be described with reference to the drawing which shows a block diagram of a signal system according to the invention.

At the ends of the block of a single-track section to be secured, pairs of detectors 2, 2 'and 3', 3, which detect a rail vehicle, are arranged, the sensors 2, 2 'or 3, 3' of each pair being at a small distance from each other are arranged.

The encoders 2, 2 * are connected to a circuit for detecting the order of the response of the encoders of this pair, which are formed by the two AND gates 11, 12, the encoders 3. 3 * of the other pair having a similarly constructed circuit The one inputs of the AND gates 11 11 ', 12, 12 * are ashed with a negation and the other inputs are formed as dynamic inputs

When retracting a rail vehicle from the left, first the encoder 2 emits a signal, whereby the AND gate 11 due to the negated second input outputs a signal to the upward counting input V of the Zähterschaitung 4 and increases its count The output of this counter circuit 4 gives bet a non-zero count an Ausgangsigna! from, the output being connected via an AND connection mH to the reset input of a flip-flop 6, the output of which is connected to two emergency signals 1, 1 'arranged at a distance corresponding to one another in the middle of the block at a speed which is permissible in this block.

The same occurs when entering a rail vehicle from the right into the block on the Zähiersehaltung 4 'a. In this case, the output of the counter circuit 4, which is assigned to the encoders 2,2 * connected via a decoupling diode VE with the arranged on the encoders 2,2 'opposite end of the block signal 5' and puts this on hold when the counter circuit 4 shows a nonzero count

The same applies with regard to the signal 5 for the 4 × wire cutting.

When extending a rail vehicle from the block, the AND gate 12, and the AND gate 12 'turns on. Since the outputs of the two AND gates 12, 12 'are connected to down-count passages of both counterfeiting lines 4, 4', upon extension of a rail vehicle from the block

AT 397 792 Β the counter readings of both Zählschaitungen 4, 4 'un 1 reduced, but negative counter readings are excluded.

If a potential change to H takes place at the same time at a count-back input and the predisting input V, then the counter reading must not be changed.

If there is a potential change to H at both count-in inputs at the same time, the counter reading must be reduced by 2. This is the case when 2 trains simultaneously leave the section in opposite directions. This may be the case with Bauzugfahrten.

When retracting a rail vehicle in the Biode at a time when there is a moving in the opposite direction rail vehicle in the block, it comes to signaling the outputs to both Zahlerschattungen 4, 4 'which on the AND operation of Flij> Flops 6 this reset and thus the distress signals 1, Γ are set to HALT.

With the emergency signals 1, T is further a Blinkschattung 10 is connected, which can be controlled by each of the outputs of Zählschaitungen 4,4 'via an OR circuit 9 with negated output This is sicherergostellt that after the insertion of a rail vehicle, the flashing shaft 10 is passivated and is the emergency signals to stop the signal that the system is in operation, stop flashing.

To set the flip-flop 6 a manually operated switch 8 is provided, which may optionally be operated only after overcoming a lock. Thus, the flip-Ffop 8 after resetting due to the retraction of two rail vehicles in the block in two different directions, the flip-flop 6 are set again.

Thus, the outputs of the counter circuits 4, 4 'are via the contacts of a doppelpoiigen switch 7 and decoupling with the other at the ends of the block, z.3. in the area of ​​two stations, arranged signal 5, 5 'connectable. When closing this switch 7, both signals 5, 5 * can be brought into a defined position.

The entire block is further subdivided into a number of sub-blocks A to Z, at the boundaries of which also pairs of track-engaging detectors 102, 102 ', 103, 103' are arranged, which are connected to circuits 111, 112; 111 ', 112' are connected to detect the order of the response of these donors and the already described circuits 11,12 and 11 ', 12' correspond.

These circuits are connected on the one hand to the reset inputs and via an OR circuit 109 to the set inputs of two flip-flops 104, 104 '. The outputs of these flip-flops 104, 104 'are connected to an AND circuit 110 whose output is negated. This negated output is connected to two signals 105, 105' arranged at both ends of the sub-block A to Z concerned.

When entering a rail vehicle in a sub-block A to Z is depending on the direction from which the rail vehicle enters the sub-base, first the encoder 102 or the encoder 103 is activated, it so that the associated AND gate 111. 111 'in conjunction with the the second negating input turns on and resets the connected flip-flop 104 or 104 '.

As a result, however, the output of the flip-FIopg 104,104 'is set to LOW and connected to the two flip-flops 104, 104 * AND circuit 110 outputs via the negating output a signal to the two, arranged at the ends of the respective sub-block signal 105th 105 'off, causing this

4o be set to COLD.

When extending the rail vehicle from the sub-block in question first the internal encoder 102 ', 103' is activated whereby in conjunction with the second encoder of the corresponding pair of encoders, the corresponding AND circuit 112, 112 'turns on and on the ODERSchaltung 109 the two Flip-flops 104, 104 'is set and thus again the two inputs of

AND circuit 110 are acted upon, whereby the signals 105,105 'at the ends of the relevant Unterbtockes no longer beauf beat and zurückfalien to FREI.

On this catfish, the individual sub-blocks after retraction of a Schienenfshrzeuges by the position of the corresponding signals 105, 105 'for the entrance of other rail vehicles, even from the same direction, locked and will not be released until the rail vehicle has left the sub-block again Due to the OR circuit 109, the function of the sub-blocks is also given properly, if a rail vehicle, for example of iinks enters a subblock and leaves it to the left again like this, for example for construction journeys may be the case.

The same applies also with regard to the entire block, since the two AND circuits 12, 12 ', which are connected in the exit direction of the pairs of encoders 2, 2 * and 3, 3', are connected to the down counting inputs of both ss counter circuits 4, 4 '.

In the subblocks A and Z located at the two ends of the block, the encoders 2, 2 'and 3, 3' provided for the control of the entire block are simultaneously used as encoders for the subblocks A and Z, respectively.

AT3S7 792B

If several trains feed in the section and the last one should not pass through the section, but after a stay the section in the opposite direction should leave again (construction use!), The following sequence occurs:

Ride the passing trains as normal as described above. After the last train pulled in (train) the switch 7 has to be closed to prevent the use of other trains (so that the train had its back free). Thus, the counter signal 5 goes to HALT (if the trains are retracted from the left, otherwise 5 ') · The traversing trains cause when extending the upper and 12 ST 12' a count back COUNTER 4 to 1 (that is the train). Now, if the train leaves after completion of his job the section in reverse, the counter COUNTER 4 is set to 0 via the AND io circuit 12.

The section is now free again and the switch 7 must be reopened to allow for the next trains again driving in block distance.

The number of subblocks in a block is basically freely selectable and depends on the length of the block and the maximum speed of the vision vehicles and the required density of the sequence of trains configured for the respective block.

The installation of the system can be carried out particularly efficiently, since with the entire block with the switch closed 7 ready full protection is given.

After setting up the sub-blocks AZ and opening the switch 7 then the full capacity is given.