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UREA WATER TANK OF CONSTRUCTION MACHINE
To provide a urea water tank of a construction machine that can speedily unfreeze and supply urea water reserved inside to an injection nozzle if the urea water is frozen, and thereby can let an SCR catalyst function as early as possible.SOLUTION: A urea water suction duct 25 is extended vertically in a urea water tank 16, and urea water is sucked from a suction part 31 provided therebelow to be supplied to an injection nozzle for an SCR catalyst. Cooling water ducts 27a and 27b are extended vertically and also have their lower parts connected by a folded duct 27c, and the urea water frozen in the urea water tank 16 is unfrozen with heat of engine cooling water circulating therein. A heat insulation cover 40 is installed correspondingly to vertical extension parts of the ducts 25, 27a and 27b to block heat radiated to the left from the cooling water ducts 27a and 27b, and consequently, quantities of heat transfer to the urea water suction duct 25 and the suction part 31 located on the right side of the heat insulation cover 40 are increased to achieve early unfreezing.SELECTED DRAWING: Figure 3
【課題】内部に貯留された尿素水が凍結した場合に迅速に解凍して噴射ノズルに供給でき、これによりＳＣＲ触媒をいち早く機能させることができる建設機械の尿素水タンクを提供する。【解決手段】尿素水タンク１６内で尿素水吸込み管路２５を上下方向に延設し、その下部に設けたサクション部３１から尿素水を吸い込んでＳＣＲ触媒の噴射ノズルに供給する。冷却水管路２７ａ，２７ｂを上下方向に延設して互いの下部を折返し管路２７ｃにより接続し、その内部を循環するエンジン冷却水の熱により、尿素水タンク１６内で凍結した尿素水を解凍する。各管路２５，２７ａ，２７ｂの上下方向への延設箇所に対応して遮熱カバー４０を配設し、冷却水管路２７ａ，２７ｂから左方に放射される熱を遮り、これにより遮熱カバー４０の右側に位置する尿素水吸込み管路２５及びサクション部３１への伝熱量を増加させて早期解凍を図る。【選択図】図３
UREA WATER TANK OF CONSTRUCTION MACHINE
To provide a urea water tank of a construction machine that can speedily unfreeze and supply urea water reserved inside to an injection nozzle if the urea water is frozen, and thereby can let an SCR catalyst function as early as possible.SOLUTION: A urea water suction duct 25 is extended vertically in a urea water tank 16, and urea water is sucked from a suction part 31 provided therebelow to be supplied to an injection nozzle for an SCR catalyst. Cooling water ducts 27a and 27b are extended vertically and also have their lower parts connected by a folded duct 27c, and the urea water frozen in the urea water tank 16 is unfrozen with heat of engine cooling water circulating therein. A heat insulation cover 40 is installed correspondingly to vertical extension parts of the ducts 25, 27a and 27b to block heat radiated to the left from the cooling water ducts 27a and 27b, and consequently, quantities of heat transfer to the urea water suction duct 25 and the suction part 31 located on the right side of the heat insulation cover 40 are increased to achieve early unfreezing.SELECTED DRAWING: Figure 3
【課題】内部に貯留された尿素水が凍結した場合に迅速に解凍して噴射ノズルに供給でき、これによりＳＣＲ触媒をいち早く機能させることができる建設機械の尿素水タンクを提供する。【解決手段】尿素水タンク１６内で尿素水吸込み管路２５を上下方向に延設し、その下部に設けたサクション部３１から尿素水を吸い込んでＳＣＲ触媒の噴射ノズルに供給する。冷却水管路２７ａ，２７ｂを上下方向に延設して互いの下部を折返し管路２７ｃにより接続し、その内部を循環するエンジン冷却水の熱により、尿素水タンク１６内で凍結した尿素水を解凍する。各管路２５，２７ａ，２７ｂの上下方向への延設箇所に対応して遮熱カバー４０を配設し、冷却水管路２７ａ，２７ｂから左方に放射される熱を遮り、これにより遮熱カバー４０の右側に位置する尿素水吸込み管路２５及びサクション部３１への伝熱量を増加させて早期解凍を図る。【選択図】図３
UREA WATER TANK OF CONSTRUCTION MACHINE
建設機械の尿素水タンク
MURAKAMI TATSUHIRO (author) / ISHII KIYOMI (author)
2023-03-29
Patent
Electronic Resource
Japanese