SU1366783A1 - Device for checking liquid supply to reservoir - Google Patents

Abstract

Invention m. used in low-power steam boilers. The purpose of the invention is to increase the reliability of the water supply system. A liquid level sensor 1 is connected to converters 2, and 3 lower and upper levels connected in series with actuator coil 4 (MI). The time relay 6 is turned on through the closing contact (AC) 5 of the MI, and the alarm lamp 8 of the time relay 9 is switched on through the AC 7 to-rogo. ZK 10 relay 9 is included in the circuit of the disconnecting coil 11 of the emergency switch, and ZK 12 THEM is included in the switching circuit of the feed pump 13. Parallel to the converter 2, ZK 14 IM is connected. Emergency shutdown occurs if the pump 13 for the total time of the two settings of the relay 6 and 9 does not have time to submit to the level of the upper level, Il. with (L

Description

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The invention relates to devices for controlling the supply of liquid to tanks and can be used in steam boilers of low power.

The purpose of the invention is to increase the reliability of the water supply system.

The drawing shows the functional diagram of the device.

The device remains switched on, as the converter 2 is shunted by the closing contact 1 of the actuator.

With a further increase in the level to the level of the upper level, the contact of the converter 3 is opened, the coil 4 is turned off, it is turned off

The device contains a sensor 1 level-10 as well as a time relay 6 and a nutrient n fluid associated with a conversion pump-13.

bodies 2 and 3 of the lower and upper levels, which are connected in series with the coil 4 of the actuator, through the closing contact 5 of which the first time relay 6 is turned on. The signal lamp 8 and the second time relay 9 are switched on via the make contact 7 of the first time relay. The closing contact 10 of the second time 9 is connected to the circuit of the tripping coil 11 of the emergency switch. The closing contacts 12 of the actuator are included in the switching circuit of the feed pump 13. Parallel to the converter 2 of the lower level, the closing contact 14 of the actuator is connected. .

The device works as follows. ,

The signal from level 1 sensor is supplied to the inputs of converters 2 and 3 of the lower and upper levels. When the liquid level drops to the Lower level, the output contacts of the transducers 2 and 3 are closed, after which the voltage is applied to the driver 4, which, with its closing contacts 12, turns on the feed pump 13, and the liquid begins to flow into the tank. At the same time, the first time relay 6 is turned on via the make contact 5 of the actuator.

When the fluid level is higher than the mark. The lower level of the transducer 2 opens its contact, but coil 4 of the actuator

If during the set time of the relay 6 time the pump 13 does not provide | Water supply to the Top level mark, then the first time relay 6 is activated, turning on its contact 7 signal lamp 8 The supply is small and turns on the second time relay 9. Relay 9 at the expiration of the set time through the closing contact 10 applies a voltage to the tripping coil

11 emergency switch.

Emergency shutdown occurs if the pump 13 in the total time of the two settings of the relay 6 and the relay 9 does not have time to supply water to the top level.

Claims (1)

Invention Formula A device for controlling the supply of a liquid in a reservoir containing a level sensor with its own top and transducers. lower operating levels, connected in series in the coil circuit of the actuator, the closing contacts of which are included in the supply circuit of the pump. characterized in that. in order to increase reliability, it contains the first time relay, the second time relay, and the signal lamp and the emergency switch, with the closing contacts of the first time relay included in the coil circuit of the second time relay and the signal lamp circuit, and the closing contacts of the second time relay included in the circuit of the emergency switch katuiki.