RU1827430C - Vehicle compressed-air unit - Google Patents

Abstract

SUMMARY OF THE INVENTION: a compressor with a drive motor is gas-coupled to an adsorber drying chamber, sequentially mounted by a heat exchanger and a check valve, with a casing cavity, a shunt pipe with a shut-off element. The drying chamber is connected to the air intake through a check valve and a purge valve located in the casing - with the atmosphere. A drying line is connected to a communication line, a drying chamber with an air intake in front of the check valve. A shut-off valve is installed in the communication line between the compressor and the drying chamber behind the heat exchanger, and an isolation organ is installed in front of the heat exchanger. The cavity of the casing is sealed and communicated with the drying chamber by a pipeline with a locking body. The motor is controlled by a pressure switch. The purge line is connected by an inlet to the communication line of the drying chamber with the air intake by a check valve and is equipped with a throttle. 1 ill.

Description

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The invention relates to installations for producing compressed gas in a vehicle and may find application in rolling stock of railway vehicles.

The aim of the invention is to increase the reliability of the installation at low ambient temperatures.

The drawing shows a schematic diagram of an installation for producing compressed air in a vehicle.

The installation comprises a compressor 1 with a drive motor 2, controlled by a pressure switch 3, with contacts 4 and 5. A heat exchanger 6, a shut-off valve 7, controlled by an electromagnetic valve 8, a check valve 9, an adsorber 10 are connected to the compressor 1 in series.

a purge valve 11 located in the casing 12. Next, a check valve 13 is installed, in parallel with which is connected an adsorber purge line 14 with a throttle 15, a dry air line 16 with an air intake 17. A shunt conduit 18 connected to the casing 12 is connected in parallel with the heat exchanger b after the compressor 1. which, in turn, is connected by a pipe 19 to the adsorber 10. After the compressor 1, isolation valves 20 and 21 are installed in front of the heat exchanger 6 and before the shunt pipe 18, and in the power circuit of the shut-off valve 7 - uncoupling valve 22. The drive motor 2 receives control power from the source 23 through the button 24. To disconnect the electrical power from the electromagnetic

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Pentyl 8 is provided with a switch 25. An isolation valve 26 is installed in the pipe 19. The purge valve 11 is controlled by an electromagnetic valve 27.

Installation works as follows.

By turning on the button 24 through the closed contacts 5, the drive motor 2 is turned on and the compressor 1 is started. At positive ambient temperatures, the isolation valve 20 is open, the valve 21 is closed, the valve 26 is closed, the valve 22 is open, the switch 25 is turned on. Compressed air from the compressor 1 through the open valve 20, the heat exchanger 6, the normally open shut-off valve 7. The check valve 9 enters the adsorber 10, is dried in the adsorbent layer, and through the check valve 13 it is sent to the dry air line 16, to the air intake 17 onwards to the consumer. When the maximum working pressure is reached in the air inlet 17, the pressure switch 3 is activated. Its contacts 5 are opened and contacts 4 are closed. The drive motor 2 is turned off, the compressor 1 is stopped, the electromagnetic valve 8 is turned on. The shut-off valve 7 is closed, and the heat exchanger 6 is disconnected from the adsorber 10. Simultaneously power is supplied to the valve 27, the purge valve 11 opens, communicating the adsorber 10c with the atmosphere. After emptying the adsorber part of the air from the air intake 17 through the throttle 26 and the adsorber purge line 14, it enters the adsorber 10. It regenerates adsorbent and is vented to the atmosphere. When the minimum working pressure in the air intake 17 is reached, pressure switch 3 is activated. Its contacts 4 are opened and contacts 5 are closed, shut-off valve 7 is opened, purge valve 11 is closed, compressor 1 is turned on and the cycle is repeated.

At low ambient temperatures, to avoid freezing of the purge valve 11 and the bottom of the adsorber 10

shut off the isolation valves 20 and 22, and open 21 and 26, turn off the switch 25. Now the warm compressed air from the compressor 1 is directed through the shunt pipe 18 into the casing 12, heats the bottom of the adsorber 10 and the purge valve 11 and enters the adsorber 10 through the pipe 19 for drying. Further, everything happens according to the scheme described above.

The technical and economic efficiency of the invention compared with the prototype is to increase the reliability of the installation by eliminating the possibility of freezing the bottom of the adsorber and valve

purge.

Claims (1)

SUMMARY OF THE INVENTION Installation for producing compressed gas in a vehicle, comprising a compressor with a drive motor, a relay pressure of the heat exchanger, an adsorber with a casing and a drying chamber and an air intake, the compressor being gas-connected to the drying chamber by means of a heat exchanger installed in series and a check valve, and with a casing cavity, by means of a shunt pipeline with a shut-off element, the drying chamber is connected to the air intake through a check valve and through a purge valve, located in the casing, with the atmosphere, a drying line is connected to the communication line between the drying chamber and the air intake in front of the check valve, characterized in that, in order to increase the reliability of operating at low temperatures, a shut-off valve is installed in the communication line between the compressor and the drying chamber behind the heat exchanger, and an isolation organ is installed in front of the heat exchanger, the casing cavity is sealed and connected to the drying chamber by a pipeline with a shut-off element, the engine is controlled by a pressure switch, and the purge line is connected by an input to the communication line of the drying chamber with air inlet check valve and equipped with a throttle. W h