VS Titarenko, art. Electrician distance Lozovsky South Road
Mirror survey of railway track
According to the technological process of service PONAB-3 when checking the parameters in the sentry boxes of equipment machinery is switched off. At this time, the passing trains are not controlled by heating Books.
In order not to turn off the equipment during the test, the outside of the windows I installed the mirror survey of railway track. I installed at an angle so that the measurement of parameters in blocks through a mirror you can inspect the railway line from the approaching train sitting at the counter PONAB-3.
When approaching train at 1000 m from the post of all the switches is set to the original position, and upon arrival at the train station PONAB control channel and the heat. magnetic work the pedals. Departing from his post, mirror shuttered windows. This reduces scan time and increases the safety of trains.
Magnetic pedal PBM-56 will be safer
Often defective magnetic pedal PBM-56 discarded due to damage of the coil.
For stable operation of the pedals must be securely isolate the coil from moisture. You can use the following method.
Remove the coil from the pedal, put in the oven for 20-30 minutes. After warming up the body disconnect, remove the coil to remove her herringbone tape. Then put the spool in an oven for 24 hours. During this time, paraffin and drain coil dries well. The hot it must infiltrate varnish, which is impregnated with armatures, and then put in the oven for 8-10 hours.
Then wrap a coil of new herringbone tape, dipped in nail polish and dry.
Impregnated and dried coil dipped in a heated mass of the cable (to fill the joints). Cable mass pour in half to cover. We put the coil in one of the covers, the other cover or tightening bolts. It is advisable therefore to process immediately coils 8-10.
Control of heating of axle boxes illuminated by the sun bolometer
The sun hits the bolometer PONAB-3 for nearly two months in the year up to three hours a day (see. «ATIS», 1978, number 12). At this time, the temperature is not controlled by the Bucs, as opening gates sun illuminates the bolometer, power locks. After passing five or six cars amplifier offers, information about the journal boxes of three or four cars are imprinted false.
To avoid this phenomenon, I changed the scheme (Fig. 1) opening the shutters of the pulse counter to the prohibition of the first four axes. I cycled free trigger Tr 2/3 T in the timer circuit wagons. Also, set the panel in the control unit and switch the TV 1-2 D9D diode (additional elements and wires in Fig. 1 shows the thickened lines). Jumper from pin 3 of the switch valves to contact Us 8 1/3, G removed.
For the period sunlit bolometer additional switch TV 1-2 «Sun — Off» is set to «Sun». After the passage of the train diagram is reset by a signal «end of train» through the amplifier Vc 1/1, G and the diode D9D.
As a result of alteration circuit valve opening when the locomotive overlaps solar flux directed to a bolometer. Thus, there are no big differences in voltage amplifiers. Fig. 2 shows the control of the Bucs ostsillograma revised scheme.
When setting PONAB-3, as well as during periods when there is no sunlight on the bolometer, TV switch 1-2 is set to «Off».
SCHEME OF CONTROL UNIT BPD signal circuit
Acting in accordance with the instructions GTSS number 5 on 07/11/83 Lamp burnout control scheme the green light at the weekend and route traffic lights does not allow the case of failure of the block BPD or fuse in the circuit to open his power signal, in spite of compliance with all dependencies.
In order to allow the departure and prosledovaniya trains in the event of a malfunction of Art. Electrician Group on adjustment and commissioning of signaling devices Moscow road IV Fedorov proposed to amend the scheme, as shown in Fig. 1 and 2. Now switch fault is supplied not from the station battery, and from the power BPD. If the power supply from this unit fault relay de-energized, giving fault monitoring.
In the 2nd signal circuit in series with the relay RU included relay fault and slowly acting on the dropout relay 2ANS (for signal routing), or HSV (for output). In normal operation, all units alarm relay circuit passes through the front-line relay fault. In the case of a blown bulb green light relay RU momentarily de-energized relay fault and let your anchor 2ANS relays (HSV) continues to hold the anchor due to deceleration. Through rear relay fault and frontline 2ANS (OPA) restored the power supply circuit and the signal relay Uzbekistan remains open, switching indication from green to yellow.
If for some reason lost the power output from the BPD, fault relay is de-energized. Through his contacts and rear surround relay 2ANS (OPA) in the signal path is fed power P pole, allowing the signal to open.
The power circuit of the relay LC (pins 222 and 122 block of P-62 or output 25 block ID) in series with the rear contact fault enabled relay 2ANS (OPA) for the possibility of opening the previous signal to green reading, t. E. To activate the alarm in accordance Regulations.
Changes made to the templates are shown in Figures thickened lines. The scheme was introduced on the Moscow road.
Small antennas for the radio station «Dnepr»
VD Korneev, Engineer
Portable radio station «Dnepr» equipped with two types of antennas: a quarter of wire embedded in the strap, and pin height of 50 cm. The antenna is built into the strap eventually breaks off at the base. This possible failure of the last stage of the transmitter. Furthermore, due to the proximity of the antenna to the body of the operator communication reliability is reduced. Whip antenna is also not very convenient to use because of the relatively large length and considerable flexibility.
I propose to use the rod antenna shorter, more convenient to use. The antenna consists (see. Figure) of three parts: the vibrator coil extension and the grounds. Vibrator length of 110 mm is made of a flexible probe antenna supplied with the station. Lengthening the coil also serves as a shock absorber antenna. It has 17 turns of the steel wire of 1.5 mm diameter optical fiber, the winding pitch of 2 mm, coil outer diameter of 10 mm. The steel base has a thread at the end of the M4. All elements are connected by soldering.
The number of turns of the coil is picked up for work at a frequency of 150 MHz. The antenna is tuned to the emission maximum in transmission mode selection the number of turns of the coil. Monitoring is conducted using the field strength indicator. For moisture protection to the antenna fits PVC tubing of suitable diameter.
CHANGING PATTERNS ON voltage relay at the front PV-60
When using the PT-60 racks repeatedly been cases when one of the phases is overloaded (especially the second feeder, providing lighting fast EC and other facilities catering) feeder is not diverted to non-defective, leading to erratic operation of signaling devices. This is due to the fact that voltage relay rack MF-60 are connected between the phases at 380, while the signaling device on the receiving power of 220 V.
In both of the feeder comes with a three-phase voltage transformer, the windings are connected in a «star». When you overload one phase of tension between them does not change, and the voltage «phase — zero» varies considerably.
To address this shortcoming, a senior electrician Komsomolskaya distance Far Eastern Bridge Road EA offers to switch the voltage on the relay 220, as shown in the diagram shown in the figure. Thickening of the lines show the added installation, zakreschennymi — abolished. The diagram shows a single feeder circuit of the voltage relay of the second feeder is changed similarly.
This offer can be used in introductory panels supply units with three control relays and power supply system «star». This increases the stability of the protection operation especially at small lead resistance and high load asymmetry.
EXPANSION milking of sight Railway crossing Traffic lights
GD Korogod Electrician Crimean distance of the North Caucasian road
Sometimes there is a need to expand the crossings of sight level crossing traffic lights. In such cases it is recommended to use the level crossing traffic lights of the III-69 with three heads. However, they are not always available.
To solve this problem, I propose to supplement the traffic light-type 11-69 with two additional signal heads, as shown in the figure. To the top of the mast Railway crossing Traffic lights are welded section of the top of a mast height of 400 mm with two heads. Angled nipples main heads directed downwards, and more — up, which ensures their compatibility. The axes of the main and auxiliary heads are mutually perpendicular, that allows you to expand the zone of visibility of signals from the road.
To activate additional lights Monti 1 ruetsya separate circuit with flame relay type AOSH2-180 / 0.45, which contacts entered in the chain of supervisory control and start flashing circuit.
CONTROL SAMPLE blowing SHOOTER
Automatic blasting shooter occurs cyclically in accordance with the selected rate of movement of the brush sipes seeker Yasha. The complete cycle is 5 … 7 min.
However, in heavy snowfall blasting it is not effective enough. For example, after 5 minutes, the next time you cycle on snow-covered arrow should go next portion of the air. But at this point, it may happen that the needle is already involved in the route, and typically does not control the translated state (arrow working on friction). Repeated attempts to transfer the snow, caught between a tongue and stock rail, the press and issued a portion of air is not enough to blow snow. In this case, no cleaning is not enough.
Remote sampling blasting shooter proposed to apply to the Belarus road distance Gomel Senior Electrician Peter V. Yu. Control — removable, set on the remote manipulator and connected to the terminal of the cabinet.
The remote includes buttons to control the individual electro-valves (EPA) blasting shooter. For each set a separate, ventilated arrow button.
The circuit panel is shown in Fig.
Through the contacts established on the remote switch SA buttons individually controlling the power supplied terminal OP. Now, if necessary, an extraordinary blowing any arrows station duty officer presses the corresponding button, after a closed contact is terminal OP is fed directly to the solenoid EPA.
As a result, EPA will work to bypass the automatic control circuit and an arrow will be ventilated at all times until the button is pressed.