Novel relay supply equipment of automatic water-spraying fire-extinguishing system

The utility model discloses a novel relay water supply device of an automatic water-spraying fire-extinguishing system. The utility model comprises a water pump coupler, an air pressure tank, an automatic spraying main fire water pump, a control cabinet, a corresponding one-way valve and a gate valve. The utility model is characterized in that a fire engine of a fire department is connected with the water pump coupler, and water is supplied through the air pressure tank; a relay water pump is connected in series; a pressure water pipe of the relay water pump is connected in parallel with a pressure reducing valve and an electromagnetic valve; the control cabinet can adopt a frequency conversion computer control device. The utility model has the advantages that a relay water tank is cancelled; the capital investment and the occupation area or rooms which are occupied by the equipment system are saved; the interference water possibly leaks to an adjacent room is avoided; the maintenance and the management are convenient; the safety and the degree of automation of fire equipment are enhanced; the superpressure phenomenon of a fire system can be eliminated; the energy can be saved, the soft start can be realized, and the system is safer.