SU1404391A1 - Device for controlling locomotive sandbox - Google Patents

Abstract

invention relates to railway transport. The purpose of the invention is to simplify the design of control devices. The device contains an electropneumatic valve 14 connected to the compressed air line 15, which controls the drive 9 for the reciprocating movements of the sandbox shut-off valve, a nozzle 18 installed in the area of the sandbox tip 16 in front of the sand tube 6 and connected via a pneumatic container 20 and a check valve 2 to the outlet of the electropneumatic valve 14. The tank 20 has a drain valve 22. 2 Il.

Description

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18

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The invention relates to railway transport and relates to the construction of devices for preventing the slipping of wheels of a rail vehicle.

The purpose of the invention is to simplify the construction of locomotive sandbox control devices.

FIG. I shows the control circuit of a sandbox locomotive with an air duct and sand conduit; in fig. 2 - locomotive sandbox, cut.

Locomotive sandbox includes hopper

I, the body 2 attached to it, with an internal partition 3, spaced in its bottom part, made with a central metering opening 4, adjacent to this partition a branch pipe 5 for withdrawing the sand-air mixture to a sand supply pipe 6. Over the metering hole 4 there is a shut-off valve loosening valve 7 with radial loosening ring c. In case 2, a pneumatic actuator 9 of reciprocating movements is installed, the functions of which are controlled by a shut-off valve 7, which is constantly under the influence of springs 10 and

II. With the aid of the screw 12, the stroke of the shut-off valve is adjusted. The pipe 5 through the hole 13 is communicated constantly with the atmosphere. The actuator 9 of the reciprocating movement is controlled by an electropneumatic valve.

14, connected to the compressed air line 15. The sand supply pipe 6 is connected to the tip 16 having a cylindrical nozzle 17. The nozzle 18 is installed in the area of the tip 16 in front of the sand supply pipe 6. The compressed air is supplied by a pipe 19 connected through the pneumatic tank 20 and a check valve 21 to the outlet of the electropneumatic valve 14. The condensate is drained from the tank 20 by means of a drain valve 22.

When the electro-pneumatic valve 14 is turned on, the compressed air simultaneously enters the actuator 9 of the reciprocating movements and through the check valve 21 and the tank 20 into the pipe 19 to the nozzle 18. When compressed air enters the actuator 9 of the reciprocating movements acting as - the porn valve 7 is moved upwards and opens the metering opening 4 through which sand enters from the hopper 1

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in the pipe 5 and further into the sand-feeding pipe 6. Screw 12 adjusts the amount of movement of the valve 7 and, thus, the amount of sand passing through the metering orifice 4. When compressed air passes through the nozzle 18 and atmospheric air enters through the hole 13, ejection and air-sand mixture are provided the tip 16 and the nozzles 17 are fed to the contact zone of the wheel with the rail. When the electro-pneumatic valve 14 is turned on, the supply of compressed air to the actuator 9 of the reciprocating movement is stopped and its working cavity through the electro-pneumatic valve 14 is connected to the atmosphere. Under the action of the springs 10 and 11, the shutoff valve 7 closes the metering opening 4 and the flow of sand from the hopper 1 to the nozzle 5 is stopped. Since the pneumatic container 20 is connected to the electropneumatic valve 14 by means of a non-return valve 21, the supply of compressed air stored in the container 20 continues in the pipe 19 and further into the nozzle 18 until the tank is completely depleted.

Thus, after shutting down the supply of sand, Sand-feeding pipe 6, tip 16 and nozzles 17 are blown with compressed air, which prevents sand from sticking, especially in winter conditions of the locomotive sandbox, and ensures reliable operation of the sandbox.

Since drier air enters the nozzle, the sand-air mixture is of higher quality, and blowing it with drier air will increase the reliability of the sandbox.

Claims (1)

Invention Formula A locomotive sandbox control device comprising a drive for reciprocating movements of a sandbox valve connected to a compressed air line through an electropneumatic valve and a check valve installed in a pipeline connected at one end to an electropneumatic valve outlet, in order to simplify the design, it is equipped with a container installed in the specified pipeline between the check valve and its other end, which is connected to the sand nozzle s. J2