| 摘要 |
1. Four-way stop slide valve, more particularly but not exclusively intended to control the diversion of a liquid such as water circulating in a main circuit towards a secondary circuit (10), comprising : - on the one hand one body (1), along which four connection ports (2, 3, 4, 5) with definite widths (D2, D3, D4 and D5) and definite distances between themselves (La, Lb and Lc) are spaced out. The two intermediate ports (2, 3), called "central ports", are intended to be connected one (2) to the inlet of the main circuit liquid (6), the other (3) to the outlet of the liquid towards the continuation of the main circuit, whereas the two extreme ports (4, 5) are intended to be connected to the secondary circuit (10), the one (4) contiguous to the inlet (2) of the main circuit being connected to the outlet (8) towards the secondary circuit, whereas the one (5) contiguous to the outlet port (3) towards the continuation of the main circuit is connected to the return of the aforesaid secondary circuit (10) ; - on the other hand one slide (12) axially sliding in the body (1) and made of one control rod (15), on which two valves (16, 17) are locked with such a definite space (Ld) that, when the slide has been pushed on one side, these valves (16, 17) are situated in the body (1) respectively between, on the one hand, one of the two central ports (2, 3) and, on the other hand, one of the extreme ports (4, 5), whereas, where the slide has been pushed on the other side, position it achieves after one (17) of the valves has passed over a port (2) leading to the main circuit and the other (16) has passed over a port (5) leading to the secondary circuit, in order that one (17) of these valves should place itself between the two central ports (2, 3), while the other valve (16) moves beyond the four ports and becomes inoperative, this valve being characterized in the fact that : - on the one hand, the distance (La ) measured between the center lines of the return (9) port (5) of the secondary circuit (10) and the outlet port (3) towards the continuation of the main circuit is higher than the distance (Lc) measured between the center lines of the outlet (8) port (4) towards the secondary circuit (10) and the inlet port (2) of the main circuit, and, - on the other hand, the distance (Ld) between the center lines of the two valve (16, 17) gaskets is both higher than the sum of the distance (La) measured between the center lines of the return (9) port (5) of the secondary circuit and the outlet (3) port towards the main circuit, increased by the half of the widths (D3, D5) of the same ports, and also lower than the sum (La plus Lb) of the distances measured the first one (La) between the return port (5) of the secondary circuit (10) and the outlet port (3) towards the main circuit and the second one (Lb) between the inlet and outlet ports (2, 3) of the main circuit.
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