MULTISUPPORT WATER-SPRINKLING MACHINE CONTROL AND PROTECTION APPARATUS Russian patent published in 1994 - IPC

FIELD: agriculture. SUBSTANCE: apparatus has a system of hydraulic protection and of a shutting unit hydraulic drive, an electric hydraulic valve and a hydraulic switch. The shutting unit with hydraulic drive is mounted on a pressure pipeline. The hydraulic drive is controlled by an adjusting valve, using alternating feeding of water from the pressure pipeline through a shutter valve and a pipeline, through a control valve cavities correspondingly in the hydraulic drive cavity to open and to shut. Over membrane shutting cavity of the adjusting valve is hydraulically connected with output of hydraulic switch and over membrane adjusting cavity through the pipeline is connected with the pressure pipeline behind the shutting unit. In normal state a slide valve of the adjusting valve due to action of a spring is in extreme right position, being engaged with the membrane of the adjusting valve and through a rod - with a membrane of sensitive member. In the case under membrane cavity through a canal and the slide valve cavity through a canal are communicating with atmosphere. The hydraulic switch with canals of feeding, draining and output has shutters, connected by a lever through a spring with a pusher, that is engaged with the membrane. Hydraulic protection system has a pulsed line, that in series connects water draining valves, mounted on each carriage of the machine. One end of the pulsed line is connected with the over membrane cavity, another one through pipelines - with electric hydraulic valve. The last valve with canals of feeding, draining and output has shutters, connected by a lever through a spring to a core of electric magnet, winding of which is connected to an input canal of the switch. EFFECT: apparatus is used for water-sprinkling machines control and protection. 1 dwg