Structure for reducing agent container

A structure of a reducing agent container which stores a liquid reducing agent used in an exhaust gas purification apparatus for reducing and purifying nitrogen oxide in an exhaust gas, wherein a canopy is removably secured to a container body of the reducing agent container to block off an opening arranged in an upper face of the container body, the canopy being respectively fitted with:

• a base of a water level indicator for detecting a remaining amount of liquid reducing agent;
• a base of a densitometer for detecting a density of a liquid reducing agent;
• and a heat exchanger which surrounds detection portions suspended from the bases of the water level indicator and the densitometer, and through which is circulated a heating medium of which a heat source essentially consisting of an engine as, to perform heat exchange with the liquid reducing agent, and wherein the canopy is respectively formed with:
• a supply port and a return port for the liquid reducing agent so that the water level indicator, the densitometer, the heat exchanger, and the supply port and the return port for the liquid reducing agent are formed integrally with the canopy wherein the base of the water level indicator is removably secured to the canopy, and on a tip end of the water level indicator extends in an axial direction thereof, and a bracket having an insertion hole for removable insertion of the pin, is fitted at a position where the heat exchanger extends along a bottom face of the container body.