Two-stage pressure relief structure of hydraulic device

The utility model relates to the field of hydraulic control, in particular to a two-stage pressure relief structure of a hydraulic device. The two-stage pressure relief structure of the hydraulic device comprises a first-stage pressure relief loop, a second-stage pressure relief loop, a first overfl...

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Bibliographic Details
Main Authors CHEN SONG, JIA XITAO
Format Patent
LanguageChinese
English
Published 30.04.2014
Subjects
FORGE FURNACES
FORGING
HAMMERING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PRESSING METAL
PUNCHING METAL
RIVETING
TRANSPORTING
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Summary:The utility model relates to the field of hydraulic control, in particular to a two-stage pressure relief structure of a hydraulic device. The two-stage pressure relief structure of the hydraulic device comprises a first-stage pressure relief loop, a second-stage pressure relief loop, a first overflow valve (2-1) and a second overflow valve (2-2), wherein the first overflow valve (2-1) and the second overflow valve (2-2) are connected at back of a first direction cartridge valve (26-1) and a second direction cartridge valve (26-2) in series respectively. The direction cartridge valves guarantee that leakage will not occur during pressure maintenance; when the first direction cartridge valve (26-1) is opened, the pressure of high-pressure oil is stably relieved to 70% that regulated by the first overflow valve (2-1) after the high-pressure oil flows through a special first throttling valve (27-1); after the pressure is maintained for a certain period of time, the second direction cartridge valve (26-2) is open
Bibliography:Application Number: CN20132744022U