SU574351A1 - Power diode-tyre sectionating system for power supply line along running rails - Google Patents

Description

one

The invention relates to the field of power supply of railway transport and concerns valve sectioning of rail networks.

A valve sectioning device on railway lines is known, in which the rail tracks are shunted at the section section by bypass bridges with groups of power polzprovodnikovyh rectifiers connected in parallel, allowing the passage current only in the direction from the section in question to the suction points of the traction substations 1.

However, such a device is ineffective and cannot be applied in areas with self-locking and track circuits, since the criteria for shunt sensitivity and sensitivity to fracture or withdrawal of the rail cannot be met in the control mode of the track circuit.

It is also known a valve sectioning device for a traction rail network, mainly underground, containing insulated rail junctions, choke transformers, whose primary terminals are connected to the rails, and the midpoints are connected to the bypass bridge 2 via valve blocks.

The disadvantage of this device is the difficulty of manufacturing protective throttles, its high cost and large gaoarites. In addition, due to high ypOBneii of traction current, the use of protective throttles in the metro reduces the efficiency of the sectioning.

The purpose of the invention is to increase the reliability of the raoogi when the rail is broken.

For this, the device is equipped with a sensor for the presence of a signal current, a signal frequency filter block, a threshold element, a signaling unit at the central dispatch point and an auto-blocking signal relay unit, the sensor for the presence of signal current connected to the bypass switch and connected to the threshold element through the filter the output of which is connected to the input of the block of the auto-lock signal relays, one of the outputs of which is connected with the alarm unit at the central distribution center and the other

connected to a traffic light installed at the section boundary.

The drawing shows a block diagram of the proposed device.

Wires are connected to the rail yarn 1

choke transformer 2. Insulating joints 3 electrically separate one rail circuit from the other. To the middle points of the choke transformer 2 are connected valve blocks 4 connected via sensor 5

the presence of signal current to the bypass bridge 6. Sensor 5 is connected via a block-filter 7 of signal current from delay lines to a normative element 8 connected to block 9 of the auto-lock signal relays, whose outputs are connected respectively to traffic light lamps 10 and signaling block 11 on the central shopping nocks

The device works in the following way.

In the normal state, a train in a traction mode on a track circuit draws a current / t through blocks 4 and a jerk 6 to the suction point of the installation (not shown). When the train passes the insulating joints of each subsequent rail circuit through the previous rail value, the draw current does not flow, since the blocks 4 are turned on its opposite. Consequently, the leakage currents from the rails are reduced in proportion to the time and train waiting time in the section under consideration. Rail circuits in normal mode work as normal symmetrical values and no sigial current flows through valve blocks. In case of rail damage (marked x) and bypass blocks 4, the rail circuit becomes asymmetrical, and a signal current of a certain amount flows through blocks 4 and jumper 6.

Calculations show that in order for the track relay of the circuit to be energized, it is necessary to have in the circuit of the bypass jumper 6 a signal frequency current of more than 1 A. At the same time, the sensor 5 detects inductively or conductance (from the shunt) signal and passing through it the signal current / It also acts on element 8, idiolated, panmer, on the Schmndt trigger, at the output of which the relay is turned on. When the element 8 is triggered, a certain sigal relay in the relay block 9 is energized, which by its contact turns on the alarm (sound and light) in the AND block of the alarm at the central control room, informing the dispatcher about the disturbance in the operation of the rail circuit and blocks 4. At the same time, traffic light 10 regardless of the state of the track relay. When restoring impaired

the circuit automatically doesn’t switch to normal normal operation.

In order to eliminate the presence of short-term interfering voltages possible in a traction network, for example during a short circuit to

rail, the signal delay frequency is entered into the signal filter block.

Claims (2)

1. Krotov L. B. and Yuditsky S. B. Power silicon valves in rail networks. “Electricity, 1966, 10. 2. USSR author's certificate №311790, cl. In 60M 5/02, 1970. Ic iE Ic IT b