| 摘要 |
<p>The device for injecting a fluid into a network comprises storage and supply means (1, 2) for the fluid to be injected, an injector (11) and a proportioning unit (7) to obtain a constant injection ratio. The injector (11) comprises two housings (12) each provided with a fluid-tight pocket (15) of variable volume. Said injector further comprises two distributors (16, 17) : a first distributor (16) providing for the filling of a pocket (15a) with the fluid to be injected and simultaneously for the emptying of the other pocket (15b) ; a second distributor (17) providing in parallel for the filling with an auxiliary fluid of the housing (12b) containing the pocket (15b) being emptied and simultaneously for the emptying of the other housing (12a). The injector (11) finally comprises actuation means adapted to generate in synchronism a switching of the distributors (16, 17) so as to invert the function of the housings (12) and of the pockets (15).</p> |
