| 摘要 |
<p>The liquid petroleum gas supply system for includes a main valve (4) and an auxiliary valve (11) mounted on either side of a reservoir. The valves are electrically operated, and act such that if one is open the other is closed. This provides for safe refueling with the gas. The supply system for liquid petroleum gas includes a supply conduit (2) in front of a main valve (4). A branch pipe (5) opens, via an automatic refill limiting device, into a reservoir (6). The reservoir (6) communicates via a return conduit (10) on which an auxiliary valve is mounted, with the supply conduit (2). This is connected beneath the main valve (4). An electrical control system (12-15) operates to close the auxiliary valve (11) if the main valve (4) is open, and conversely to open the auxiliary valve if the main valve is closed. An alarm device (16,17) is activated when the auxiliary valve is opened. The main valve (4) is a normally-open electro-valve, whilst the auxiliary valve is a normally-closed electro-valve. The control circuit includes a manually closed switch.</p> |
