SU1204439A1 - Device for controlling locomotive sand box pneumatic atomizer - Google Patents

Description

The invention relates to railway transport and concerns the construction of devices for increasing the adhesion of wheels of a traction rolling stock to rails.

The purpose of the invention is to improve the coupling of the wheels of a locomotive with the rails.

FIG. 1. shows a schematic diagram of the device; in fig. 2a, b, c are diagrams of the device operation.

The device is installed on the locomotive and is intended to supply the sand-air mixture to the contact zone of the wheel 1 of the locomotive and rail 2 by appropriately controlling the nozzle 3 of the sandbox. Its inlets are connected to a bunker 4 for sand 5 and a tank of 6 dl-compressed air. Capacity 6, in turn, is connected to a pneumatic pressure line 7.

In the inlet and outlet nozzles of the tank 6, electro-pneumatic valves 8 and 9 are installed (valve 9 is of the switching type, valve 8 is of the switching off). The electrical windings of the valves 8 and 9 are connected to the output of the pulse chopper 10, which receives power from the electrical source through the control button 11. The output of the generator 12 pulses is connected to the control input of the chopper 10. This generator is connected to the outputs of the speed sensor 13 and the boxing sensor 14.

The outlet nozzle 15 of the nozzle 3 through a flexible connecting sleeve 16 is connected to the nozzle 17, directed to the zone of contact of the wheel 1 and the rail 2.

The device works as follows.

Normally, the control button P is open and the windings of the valves 8 and 9 are de-energized. When this pneumatic valve valve 8 is open and the valve 9 is closed, so that the tank 6 is filled with compressed air

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from line 7, and this air does not flow into the nozzle 3.

If it is necessary to supply sand from the bunker 4 to the zone of contact of the wheel 1 and the rail 2, to stop or prevent blocking (skidding), the button 11 is activated, as a result of which the voltage from the electrical source through the interrupter 10 enters the windings of the valves 8 and 9. At the same time valve 8 is turned off, separating tank 6 from line 7, and valve 9 is turned on, together with tank 6 with nozzle 3. Lastly, it supplies the sand-air mixture through pipe 15, hose 16 and nozzle 17 to the contact zone of wheel 1 and rail 5 sa 2. Intensity sand feed It is proportional to the air pressure at the inlet of the nozzle 3. Since the pressure drops as the air flow from the tank 6, the sand impulse has a characteristic triangular shape for different values

0 fill factor of tank 6, i.e. the ratio of the time of the interrupted state of the breaker 10 to the period of its operation. In this case, the regulation is performed by increasing the frequency of the chopper 10, as a result of which the amplitude of the pulse changes, because at high frequency the capacitance 6 does not have time to charge up to full air pressure in line 7.

Thus, by varying the fill ratio, the intensity of sanding can be adjusted, increasing approximately in proportion to the speed of movement of the locomotive, and a gradual decrease in the intensity of sanding favorably affects clutch recovery conditions as the wheel 1 gradually transitions from the surface covered with sand.

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Compiled by A. Egorov

Editor A. DolinichTech.I.VeresKorrektor L. Pilipenko

Order 8471/16 Circulation 474Po.apisnoe

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

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Claims (1)

DEVICE FOR CONTROL OF A PNEUMATIC INJECTOR OF A LOCOMOTIVE SANDBOARD, containing an electropneumatic valve of the connecting type installed between the pneumatic pressure line of the locomotive and the nozzle, connected to the control system, characterized in that, in order to improve the adhesion of the locomotive wheels to the rail, the electric main is connected to the rails, by means of a series-connected pneumatic container and an electro-pneumatic valve type, connected in parallel to the specified valve including type to the control system. FIG. 1