PROBLEM TO BE SOLVED: To provide a high pressure washing vehicle capable of suppressing erosion of a washing water return pipeline due to cavitation.SOLUTION: A high pressure washing vehicle of the invention comprises: a tank for storing washing water; a jetting tool for jetting the washing water in the tank; a pump for feeding the washing water from the tank to the jetting tool; a washing water supply path for connecting the pump and the jetting tool; an on-off valve for switching presence/absence of supply of the washing water to the jetting tool; a pressure control valve 91 for returning a part of the washing water to the tank when pressure of the washing water which flows from the pump is higher than a prescribed value; and a washing water return pipeline 92 connected to the pressure control valve 91 and configured to guide the washing water returned to the tank. Air introduction holes 94a are provided on a pipe wall of the washing water return pipeline 92 in the vicinity of the pressure control valve 91 side. When the washing water returned to the tank passes the washing water return pipeline 92, air is introduced from the air introduction holes 94a into the washing water return pipeline 92.SELECTED DRAWING: Figure 4
【課題】キャビテーションに起因する洗浄水戻し配管の壊食を抑制できる高圧洗浄車を提供する。【解決手段】本発明の高圧洗浄車は、洗浄水を貯留するタンクと、前記タンク内の洗浄水を噴射する噴射具と、前記タンクから前記噴射具まで洗浄水を圧送するポンプと、前記ポンプと前記噴射具とを接続する洗浄水供給路と、前記噴射具に対する洗浄水の供給の有無を切り換える開閉弁と、前記ポンプから流入した洗浄水の圧力が所定値よりも高い場合、前記洗浄水の一部を前記タンクへ戻す圧力制御弁91と、圧力制御弁91に接続され、前記タンクへ戻される洗浄水を導く洗浄水戻し配管92とを備え、洗浄水戻し配管92の圧力制御弁91側近傍の管壁に空気導入孔94aが設けられており、前記タンクへ戻される洗浄水が洗浄水戻し配管92を通過する際、空気導入孔94aから洗浄水戻し配管92内へ空気が導入されるように構成されていることを特徴とする。【選択図】図4
HIGH PRESSURE WASHING VEHICLE
高圧洗浄車
2017-10-05
Patent
Electronic Resource
Japanese
IPC: | B08B Reinigen allgemein , CLEANING IN GENERAL / B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS / E03F SEWERS , Abwasserkanäle |
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