JPH01151005U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing a specific embodiment of the feed water pump capacity detection device in a boiler system according to the present invention, and FIG. 2 is a schematic block diagram showing an example of a conventional feed water pump capacity detection device. It is a line diagram. 1...boiler body, 2...lower header, 3...
... Upper header, 4 ... Water pipe, 5 ... Water supply pump, 6 ... Heating mechanism, 10 ... Solenoid valve for fuel control,
13... Solenoid valve for blow control, 15... Water level detector, 16, 17, 18... Electrode rod, 19... Controller, 20... Water pump capacity determination circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A boiler body in which a lower header and an upper header are connected through a number of water pipes, a water supply pump that supplies water into the boiler body, and a water pump that heats the water supplied into the boiler body. a heating mechanism; a water level detector that communicates with the boiler body and is provided on the outside thereof;
In a boiler system comprising a controller that controls the feed water pump and the heating mechanism in response to an output signal from the water level detector, the sum of the evaporation amount and the blow amount per water pump ON time in the feed water pump is determined as an actual water supply capacity value. A water supply pump capacity determination circuit is provided for comparing the actual water supply capacity value K and the water supply capacity limit value Ko, with the value calculated from the set evaporation rate of the boiler as the water supply capacity limit value Ko; 1. A water feed pump capacity detection device for a boiler system, characterized in that, in the circuit, a decrease in the capacity of the feed water pump is determined when K≦Ko.