| 摘要 |
FIELD: agricultural engineering. SUBSTANCE: device has vertical members as cylindrical uprights and screw surface engageable with rounded valve surface. Lower rod of electromagnet core has spring-loaded contactor engageable with valve head. Its spring applies force that is greater than balloon valve spring force. First, it damps stroke and then retains the valve in working position via the head during device operation time. EFFECT: automated device operation. 2 dwg |
