Pilot type hydraulic safety valve
A safety valve and pilot-operated technology, which is applied in the hydraulic field, can solve problems such as damage to hydraulic components and measuring instruments, damage to hydraulic systems, and reduced accuracy of components and instruments, so as to achieve stable and rapid system pressure adjustment, reduce pressure shock time, and suppress The effect of amplitude
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[0015] The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.
[0016] A pilot-operated hydraulic safety valve, including a housing 1, a main valve core 2, a main spring 3, a pressure regulating knob 4, a pressure regulating spring 6, and a pilot valve core 7; Pipe B for oil return; housing 1 has an inner cavity for installing main spool 2 and pilot spool 7, oil inlet chamber A and oil return chamber B, main spool 2 and pilot spool are installed in housing 1 Among them, the main spool 2 forms cavity D between the left end surface and the housing, the K cavity is formed between the right end surface of the main spool 2 and the housing, and the G cavity is set between the main spool 2 and the oil inlet chamber A. An E cavity is formed between the spool 2 and the oil return cavity B, and a main spring 3 is provided between the right end surface of the main spool 2 and the casing; an L cavity is formed between the r...
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