Patent IL-126845-A (IL)
Title: Rotary channel-selector valve
IPC: F16K31/08
Filed: 1998-11-02
Abstract: A rotary channel-selector valve (100) comprising: a valve housing; a main valve element (3) accommodated in the valve housing, being capable of rotating between a first channel-switching position and a second channel-switching position, and having high and low pressure connecting grooves (35, 37) isolated from each other on one end surface thereof; a valve-seat plate, fixed to the valve housing, facing the one end surface of the main valve element, and having high (19) and low (15) pressure ports and first (23) and second (27) switching ports, wherein a connecting point of the high pressure port shifts from one of the first and second switching ports to the other thereof through the high pressure connecting groove by rotating the main valve element between the first and second channel-switching position and simultaneously a connecting point of the low pressure port shifts from the other of the first and second switching ports to the one thereof through the low pressure connecting groove, and rotation of the main valve element between the first and second channel-switching positions is performed with the one end surface of the main valve element being apart from the 2688 י" ד בחשון התשס" ב - October 31, 2001 valve-seat plate; a first high pressure fluid jetting groove (44a) formed on the one end surface of the main valve element, wherein one end portion, of the high pressure connecting groove, positioned near the high pressure port at the first channel-switching position opens to a periphery of the main valve element through the first high pressure fluid jetting groove; a second high pressure fluid jetting groove (44b) formed on the one end surface of the main valve element and being isolated from the first high pressure fluid jetting groove, wherein another end portion, of the high pressure connecting groove, positioned near the high pressure port at the second channel- switching position opens to the periphery of the main valve element through the second high pressure fluid jetting groove; and a bulkhead (38) being in a shape of a projecting strip and provided on a bottom surface of the high pressure connecting groove, wherein since high pressure fluid jetting from the high pressure port to the high pressure connecting groove flows easier toward the first high pressure fluid jetting groove than toward the second high pressure fluid jetting groove by an action of the bulkhead in a state that the high pressure port positions nearer one end portion of the high pressure connecting groove than the bulkhead, power of a first high pressure flow jetting from the first high pressure fluid jetting groove to the periphery of the main valve element wins power of a second high pressure flow jetting from the second high pressure fluid jetting groove to the periphery of the main valve element and rotating force in a direction from the second channel- switching position to the first channel- switching position acts on the main valve element due to difference of power between the first high pressure flow and the second high pressure flow, and, on the contrary, since high pressure fluid jetting from the high pressure port to the high pressure connecting groove flows easier toward the second high pressure fluid jetting groove than toward the first high pressure fluid jetting groove by an action of the bulkhead in a state that the high pressure port positions nearer another end portion of the high pressure connecting groove than the bulkhead, power of a second high pressure flow jetting from the second high pressure fluid jetting groove to the periphery of the main valve element wins power of a first high pressure flow jetting from the first high pressure fluid jetting groove to the periphery of the main valve element and rotating force in a direction from the first channel-switching position to the second channel-switching position acts on the main valve element due to difference of power between the first high presure flow and the