| 摘要 |
FIELD: railway signalling, centralized control and blocking devices; branches track circuits coded by automatic cab signalling currents. SUBSTANCE: branched track circuit has rail tracks with insulated joints and points and crossings 1, track circuit signal receivers 4 with point track relays 5, track circuit signal supply source 2, automatic cab signalling code signals supply source 8 and filters 3 separating signal transmission and reception channels. Frequency of source 8 differs from frequency of source 2. Source 8 is connected to one end of track circuit through front contacts of transmitter relay 7 and front contacts of corresponding code-cut in relay 6 independent for each direction of movement of train over preset route through filter 3 separating signals from track circuit and automatic cab signalling system. Source 8 is connected to opposite end of track circuit through resting contacts of transmitter relay 7 and front contacts of code-cut in relay 6. One of ends of track circuit adjoins main station track 9. Offered invention prevents possibility of getting clear ACS codes (signals) by train on side track in case of short circuit in insulated joints or passing of exit inhibiting signal. EFFECT: enhanced safety. 1 dwg |
