| 摘要 |
This invention covers to a kind of control valve, materially, it is a kind of Power-Off-Protection Type of Safety Control Double Valve applied to Pressing Machine. According to the technology proposal provided by this invention: The said power-off protection type of safety control double valve applied to pressing machines, including parallel type of double valve or cross-flow double valve; add safety valve to the output vent of parallel type of double valve or cross-flow double valve; configure at least one-aero-electric signal converter to the air flow passage from lower valve opening to compressed air output vent OUT of parallel type of double valve or cross-flow double valve; the output vent of parallel type of double valve or cross-flow double valve, is connective to the intake at one end of the safety valve; the said safety valve is a 2-position, 2-way normal open solenoid valve; the compressed air output vent of the said safety control double valve is located at one side of the safety valve, and the compressed air intake of safety control double valve is located at the other side relevant to the other side of compressed air output vent on the safety control valve. |
