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A platform for research: civil engineering, architecture and urbanism
REVERSE PREVENTION VALVE
To provide a reverse prevention valve that prevents reverse operation of an actuator at low cost.SOLUTION: A reverse prevention valve 100 comprises a valve housing 101, and a spool 102 slidably housed in the valve housing 101. The inside of the spool 102 is provided with a first communication passage 151 for allowing communication between a first supply/discharge passage 111 and a first pressure chamber 121, and a second communication passage 152 for allowing communication between a second supply/discharge passage 112 and a second pressure chamber 122. The first communication passage 151 is provided with a first throttle 151c. The second communication passage 152 is provided with a second throttle 152c. The outer periphery of the spool 102 is provided with an inside first annular groove 141 for allowing communication between the first supply/discharge passage 111 and a drain passage 113 when the spool 102 is located at a first communication position, and an inside second annular groove 142 for allowing communication between the second supply/discharge passage 112 and the drain passage 113 when the spool 102 is located at a second communication position.SELECTED DRAWING: Figure 4
【課題】低コストでアクチュエータの反転動作を防止する反転防止弁を提供する。【解決手段】反転防止弁１００は、バルブハウジング１０１と、バルブハウジング１０１内に摺動自在に収容されるスプール１０２と、を備え、スプール１０２の内部には、第１給排通路１１１と第１圧力室１２１とを連通する第１連通路１５１と、第２給排通路１１２と第２圧力室１２２とを連通する第２連通路１５２と、が設けられ、第１連通路１５１には第１絞り１５１ｃが設けられ、第２連通路１５２には第２絞り１５２ｃが設けられ、スプール１０２の外周には、スプール１０２が第１連通位置に位置しているときに、第１給排通路１１１とドレン通路１１３とを連通する内側第１環状溝１４１と、スプール１０２が第２連通位置に位置しているときに、第２給排通路１１２とドレン通路１１３とを連通する内側第２環状溝１４２と、が設けられる。【選択図】図４
REVERSE PREVENTION VALVE
To provide a reverse prevention valve that prevents reverse operation of an actuator at low cost.SOLUTION: A reverse prevention valve 100 comprises a valve housing 101, and a spool 102 slidably housed in the valve housing 101. The inside of the spool 102 is provided with a first communication passage 151 for allowing communication between a first supply/discharge passage 111 and a first pressure chamber 121, and a second communication passage 152 for allowing communication between a second supply/discharge passage 112 and a second pressure chamber 122. The first communication passage 151 is provided with a first throttle 151c. The second communication passage 152 is provided with a second throttle 152c. The outer periphery of the spool 102 is provided with an inside first annular groove 141 for allowing communication between the first supply/discharge passage 111 and a drain passage 113 when the spool 102 is located at a first communication position, and an inside second annular groove 142 for allowing communication between the second supply/discharge passage 112 and the drain passage 113 when the spool 102 is located at a second communication position.SELECTED DRAWING: Figure 4
【課題】低コストでアクチュエータの反転動作を防止する反転防止弁を提供する。【解決手段】反転防止弁１００は、バルブハウジング１０１と、バルブハウジング１０１内に摺動自在に収容されるスプール１０２と、を備え、スプール１０２の内部には、第１給排通路１１１と第１圧力室１２１とを連通する第１連通路１５１と、第２給排通路１１２と第２圧力室１２２とを連通する第２連通路１５２と、が設けられ、第１連通路１５１には第１絞り１５１ｃが設けられ、第２連通路１５２には第２絞り１５２ｃが設けられ、スプール１０２の外周には、スプール１０２が第１連通位置に位置しているときに、第１給排通路１１１とドレン通路１１３とを連通する内側第１環状溝１４１と、スプール１０２が第２連通位置に位置しているときに、第２給排通路１１２とドレン通路１１３とを連通する内側第２環状溝１４２と、が設けられる。【選択図】図４
REVERSE PREVENTION VALVE
反転防止弁
KATSURA KOSUKE (author) / SUZUKI KENJI (author) / KUBOI HIROAKI (author)
2020-03-05
Patent
Electronic Resource
Japanese
REVERSE RUN PREVENTION SYSTEM, REVERSE MOVEMENT PREVENTION SYSTEM AND REVERSE RUN WARNING DEVICE
| European Patent Office | 2017