SU111831A1 - Method of single-track direct current automatic blocking with automatic locomotive signaling - Google Patents

Description

The known schemes of single-track direct-current blocking of direct current with pulse power supply of rail prices do not allow combining them with automatic locomotive signaling.

By their construction, they also differ from double-track automatic blocking schemes, despite the fact that their operational and technical requirements are met. These circumstances make it difficult to operate the automatic blocking devices, and the presence of a large number of types of circuits of the existing single-track automatic blocking makes it difficult to organize the factory installation of relay cabinets.

The described scheme of single-track direct current blocking of direct current with pulsed rail circuits does not have these disadvantages. To implement the circuit, four wires are required, of which two wires are used to turn on linear relays and two wires to turn on directional relays. Pulsed DC current is used as track circuits.

The peculiarity of the described scheme is that the switching of the nut devices of the code track circuit (depending on the established direction of movement) is carried out in such a way that the code of the automatic locomotive signaling code always comes from the relay end of the track circuit. In addition, the code impulses of the locomotive signaling are connected to the track circuit by only one rail relay due to the power supply of the pulsed, track circuits of the block section using a traverse. This ensures that the fast blocking of code devices for automatic locomotive signaling is ensured when the train section is occupied.

The drawing shows a signal installation with signals 1 i 2 single-track auto-blocking (a), a signal installation with signal 5 (6) and a signal installation with signal 4 (c).

No. 111831

Accept the following conventions:

IPR-: pulse track relay; PIPR repeater of the pulse traveling relay; 1PIR and 2PIR - repeaters of the pulse relay; Er - pulse relay; PR - track relay, is excited only when the IPR relay is operating in a pulsed mode; PPR - repeater track relay PR; HP is a direction relay; the position of its polarized contacts determines the direction of the moving motion; 1PNR, 2PNR - repeaters of polar switches of relays and direction; ITR - contact pulse transmitter relay; 2TP is a repeater of a translational relay in a single signal installation circuit (or a relay-type relay in a single installation circuit); 1TP, a transmitter-relay relay, performs coding of rail piers; OR - contact fire relay that controls the integrity of the thread of traffic lights; MT - tobit transmitter, produces a pulsed current to power the track circuits; KPT-code track transmitter, generates a code current for locomotive signaling; 1K.T and 2K, T - code transformers; R, 1КП, 2Rn, RH, IRK, - resistance; PTV - track rectifier; PS - contacts of the floodlight; C - capacitors; PH - straight supply wire; OH - reverse feed wire; MB - minus battery; PB - plus batteries; 1P, 2P, 4P - track circuits; H-OH is a linear chain.

In the drawing, signaling and traveling instruments correspond to an even direction of movement of trains. On all rail circuits, a pulse track relay is connected at the output end.

The block section between signals 2} 4 consists of two track circuits. Pulsed power rail circuits 2P and 4P is as follows.

From the relay cabinet of the signal installation with signal 4 (8) from the track rectifier, direct current pulses are sent via the terminal MT transmitter to the 2P rail circuit.

In a signal unit with a signal 3 (6), these pulses are received by the IRP track relay and are transmitted through a reinforced contact of the PDR repeater to the 4P rail circuit.

In the signal unit, with the signals I and 2 (a) with the contacts of the repeater of the relay relay circuit connected in a linear circuit, the signaling of the vacancy of the entire block under consideration is repeated. Thus, the power supply of both track circuits comes from one master transmitter, installed in the relay switchboard of the signal unit with signal 4.

For normal operation of locomotive signaling, it is necessary that the circuits make it possible to switch on the code impulses of alternating current no later than two or three seconds after occupying the train of the block section.

The described scheme provides this condition as follows. When the train enters the block section 2P (c) the power source of the 2P rail circuit is shunted by the ramps of the train. The IPR relay of the signal installation with signal 3 de-energizes and, due to this, the power transmission of the 4P rail circuit stops. In the signal installation with signals 1 and 2 (a), the PR relay, whose contacts breaks the linear circuit, is de-energized, and signal 4 assumes a blocking position.

In the signal unit with signal 3 (b), the PR relay triggers the rear relay of the 1TP transmitter and prepares a circuit for transmitting the code signals of the automatic locomotive signaling system.

A 2TP transmitter relay contact with a signal unit with signals 1 and 2 sends code pulses to a free 4P rail circuit.

At the input end of the 4P rail circuit, these pulses are perceived by the impulse relay MTP through the connected 1KT transformer. Then, using the contacts of the 2TP transmitter relay, which is a repeater of the ITR relay, the code pulses of the automatic locomotive signaling system are sent to the 2P rail circuit. Thus, the code impulses of the automatic locomotive signaling are transmitted from the 4P rail circuit to the 2P rail circuit, which is occupied by the train.

The excitation of the traveling relays occurs separately as the track circuits become free.

Subject invention

A method of single-track direct current blocking with automatic locomotive signaling in the presence of pulsed rail circuits and four linear wires, characterized in that, in order to combine automatic locomotive signaling with an automatic blocking system and to implement coding along rail circuits, switching track instruments (depending on the set the direction of the movement in the presence of two rail circuits in the block-section) is carried out with the help of a track relay with the power supply of pulsed rail circuits A signaling alarm from one relay end of a track circuit by currents of coded pulses transmitted from one track circuit to another.