FIELD: heat exchange; power engineering.
SUBSTANCE: invention relates to the field of heat power engineering and can be used in heat supply systems. Heat supply system comprises at least one heat generator – a boiler connected to a supply line, a return pipeline attached to a line pump, which is connected to the boiler. System is equipped with a connecting pipeline with a multipurpose on/off and control valve. First and second flow-rate sensors are sequentially mounted on the supply line, and the connecting pipeline is connected by its one end to the supply line between the first flow-rate sensor connected to the boiler and the second flow-rate sensor, and is connected by its other end to the return line. Both flow-rate sensors are connected to the on/off and control valve via a control unit configured to generate a signal for opening the on/off and control valve while reducing the flow rate measured by the second flow-rate sensor, and a signal for stopping the opening of the on/off and control valve when the flow rate measured by the first flow-rate sensor reaches the initial value, and also with the possibility of generating a signal for closing the on/off and control valve with an increase in the flow rate measured by the second flow-rate sensor.
EFFECT: invention makes it possible to ensure that the flow of the heat transfer medium necessary for its operation is passed through the boiler when the main pipelines of the heat network are disconnected during repair works.
1 cl, 1 dwg
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