Dual-margin manual emergency oil drainage control circuit for helicopter

The utility model belongs to the technical field of air emergency oil drainage, and particularly relates to a double-margin manual emergency oil drainage control circuit for a helicopter. Comprising a double-pole double-throw emergency oil drainage control switch (11), a double-pole double-throw normal oil drainage control switch (12), an emergency interlocking electromagnetic relay (13), a normal interlocking electromagnetic relay (14), an emergency oil drainage valve electric pump (17) and a normal oil drainage valve electric pump (18). By adding an'emergency 'oil drain valve electric pump (17) in the oil drain valve, the safety margin of the system is increased; and an emergency interlocking electromagnetic relay (13) and a normal interlocking electromagnetic relay (14) are additionally arranged, so that the safe execution of a control instruction can be ensured more reliably. 本实用新型属于空中应急放油技术领域，具体涉及一种双裕度直升机手动应急放油控制电路。包括：双刀双掷应急放油控制开关(11)，双刀双掷正常放油控制开关(12)，应急互锁电磁继电器(13)，正常互锁电磁继电器(14)，"应急"放油阀电动泵(17)，"正常"放油阀电动泵