SU1722924A1 - Device for warning repair teams of the in-coming rolling stock - Google Patents

Abstract

The invention relates to railway transport, in particular, to devices intended for two-way notification of members of railroad brigades working on railways. ways, about the approach of rolling stock to the place of work. The purpose of the invention is to increase reliability. The device comprises a signal frequency generator 1 associated with a rail line 9 at the work site, a signal generation unit 6 and connected to the rails on one side of the work site inductance coil 7 connected to one rail with one rail controlled switch 4, additional coil 3 inductances, capacitors 2 and 8 and clock generator 5. 1 Il. (L with

Description

The invention relates to railway transport, in particular, to devices intended to alert members of traveling brigades of rolling stock approaching the work site, and are used mainly in areas not equipped with rail chains.

The purpose of the invention is to increase reliability.

The drawing shows a block diagram of the proposed device.

The device comprises a signal frequency generator 1, a capacitor 2, an additional inductance coil 3, a controlled switch 4, a clock generator 5, an alert signal generating unit 6, an inductance coil 7 and a capacitor 8.

In this case, the coil 7 and the capacitor 8 are connected to the rail line 9 at a distance of H and la, respectively, from the track location.

Blocks 1-6 are made in the form of a single design of a portable warning device that is installed and connected to the rail line 9 directly at the track work site.

The device works as follows.

First, to the rail line 9, using jumper wires, a capacitor 2 is directly connected and, using manual signal frequency adjustment

Ch Yu Yu O Yu

generator 1, a voltage resonance mode is achieved in the C2- (L-2HCi) circuit, which is controlled by the maximum voltage drop across a resistor connected in series with the capacitor 2. It is known that in the (C2- (UIICi) circuit) the voltage resonance occurs at frequency

Shn

 Yl1 / Li (C2 + Ci).

In order to reduce the effect on the resonance mode in the circuit of the odd direction of the reactivity of the even direction sensor, it is necessary to fulfill the conditions C2 d. Then

Then in a similar way with an additional inductance coil 3. Note that the voltage resonance in the circuit (Cilll i) occurs at a frequency

ABOUT)

 Y (L2 +) / L2 C Ci.

For these considerations, it is necessary to fulfill the condition LI L.2. Then

Under the conditions of C2, Ci and Li are always l, and. The specific values of the parameters of the elements Li,, Ci, C2 are chosen such that the resonant frequencies do not exceed several tens of hertz, since at high frequencies the losses in the rail line 9 sharply increase and there are difficulties in achieving the required lengths h and g approximation areas.

The experimentally refined values of the time of the driving RC circuits of the signal frequency generator 1, at which the resonances of the voltages of even and odd directions are achieved, are recorded. Subsequently, their switching and, therefore, restructuring of the generated frequency is carried out by the controlled switch 4.

Thus, alternately with the period specified by generator 5 (approximately 0.5–0.8 Hz), alternately, a series of pulses is sent from the generator, 1 through a capacitor 2 or additional inductor 3 inductance, respectively, to the frequency of the W and H. At the same time, the control relays are constantly excited at the output of the corresponding control units of the direction: in their period, due to the signal

0

five

0

five

0

50

50

five

The inputs coming to the amplifier input, and in the others, the relays remain in the active state due to the time delay for them to fall off.

When the monitored sections are free, the approximation from the rolling stock and the health (integrity) of the rails 9 on both sides of the track sites, the alert signal generation unit 6 emits intermittent acoustic and light signals.

When rolling stock approaches, for example, from an odd direction, the wheel pair of the inductance coil 7 shuns, resulting in a sharp increase in the impedance of the corresponding circuit at the sleep frequency, which leads to de-energizing the control relay of the unit, at the input of which the capacitor 2 is installed some detuning of the resonance in the circuit of an even direction, which, however, under conditions of a low Q of the circuit () does not immediately lead to a significant decrease in the current in this circuit, and control The relay of the unit, at the input of which an additional inductor 3 is installed, remains for some time in an excited state.

With further advancement of the rolling stock, the degree of detuning of the resonance in the even direction circuit increases and at a certain point in time the control relay of the even direction is de-energized. The state of the alert generation unit 6 remains unchanged until the rolling stock completely releases both of the monitored sections and until the control relays of odd and even directions are sequentially energized.

Due to the active state of the control direction relays during the flow of resonant currents, the device monitors the integrity of the rail lines and largely self-checking. Thus, when a rail is broken, current flow conditions are disturbed, which leads to an alarm in block b due to the de-energization of one of the directional control relays. When generator 1 fails, both control relays of the direction can be de-energized almost simultaneously. Such a failure causes the disappearance of all alarms, which should be considered an alarm mode. The response of the device to the exit from generator 5 is similar.

Claims (1)

Invention Formula A device for announcing rolling stock approach to a work site on railway tracks, comprising a signal frequency generator associated with a rail line at the work site, an alert signal generating unit and connected to the rails on one side of the work site, an inductance coil characterized in that in order to increase reliability, it is equipped with a single output connected to a single rail controlled by a switch, an additional inductor, capacitors and tt five a clock generator, the output of which is connected to the control input of the controlled switch, the information inputs of which are connected to one output of the signal frequency generator, respectively, through one of the capacitors and an additional inductor, connected to the alert signal generation unit, and one output frequency signal generator connected to another controlled switch, and the second output is connected to another rail rail line, while on the other side of the work site to the rails another capacitor is connected. h