CONTROL VALVE

To reduce piping connected to a control valve.SOLUTION: A pilot cap 10 of a cap 100 with an electromagnetic proportional valve of a control valve 101 includes a primary pressure passage 41 for guiding a working fluid of a primary pressure to the electromagnetic proportional valve, a secondary pressu...

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Bibliographische Detailangaben
1. Verfasser: SHIBUYA KOSUKE
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To reduce piping connected to a control valve.SOLUTION: A pilot cap 10 of a cap 100 with an electromagnetic proportional valve of a control valve 101 includes a primary pressure passage 41 for guiding a working fluid of a primary pressure to the electromagnetic proportional valve, a secondary pressure passage for guiding the working fluid decompressed to a secondary pressure by the electromagnetic proportional valve to a pilot chamber, and a drain passage for discharging the working fluid discharged from the electromagnetic proportional valve 50. A valve housing 102 of the control valve 101 includes a primary pressure confluence passage 30 in which the primary pressure passages 41 in the cap 100 with the electromagnetic proportional valve communicate with each other, and a drain confluence passage in which the drain passages in the cap 100 with the electromagnetic proportional valve communicate with each other. Hydraulic oil of a pump is supplied to the primary pressure confluence passage 30 through a support port 21 provided in the valve housing 102, and a discharge port provided in the valve housing 102 and communicating with a tank communicates with the drain passage.SELECTED DRAWING: Figure 7 【課題】制御弁に接続する配管を削減する。【解決手段】制御弁101の電磁比例弁付きキャップ100のパイロットキャップ10は、電磁比例弁に一次圧の作動流体を導く一次圧通路41と、電磁比例弁により二次圧に減圧された作動流体をパイロット室に導く二次圧通路と、電磁比例弁50から排出される作動流体を排出するドレン通路と、を有し、制御弁101のバルブハウジング102は、電磁比例弁付きキャップ100における一次圧通路41を互いに連通させる一次圧合流通路30と、電磁比例弁付きキャップ100におけるドレン通路を互いに連通させるドレン合流通路と、を有し、一次圧合流通路30には、バルブハウジング102に設けられる供給ポート21を通じてポンプの作動油が供給され、ドレン通路には、バルブハウジング102に設けられタンクに連通する排出ポートが連通する。【選択図】図7