초록 ▼

A directional-control valve is connectable to a first main pipe and to a secondary pipe. The valve includes an upstream port and a downstream port connectable to the first main pipe and having identical diameters. A third connection port is connectable to the secondary pipe. A shut-off member is cap

A directional-control valve is connectable to a first main pipe and to a secondary pipe. The valve includes an upstream port and a downstream port connectable to the first main pipe and having identical diameters. A third connection port is connectable to the secondary pipe. A shut-off member is capable of moving at right angles to the main pipe between a closed position and a second open position. In the closed position, the shut-off member includes a first orifice, of a diameter identical to that of the upstream port and downstream port, positioned in line with the upstream port and the downstream port. In the second open position, the shut-off member includes a second orifice opening toward the upstream port and toward the third connection port, so as to place the upstream port and the secondary pipe in communication, and wherein the diameter of the upstream port and the downstream port is sized to allow a scraper to pass, and the second orifice of the shut-off member includes means for preventing the scraper, coming from the upstream port, from entering the second orifice.

대표청구항 ▼

1. A directional-control valve connectable to a first main pipe and a secondary pipe the first main pipe connected to a fluid a source the valve comprising: an upstream port and a downstream port connectable to the main pipe and having identical diameters;a third connection port connectable to the s

1. A directional-control valve connectable to a first main pipe and a secondary pipe the first main pipe connected to a fluid a source the valve comprising: an upstream port and a downstream port connectable to the main pipe and having identical diameters;a third connection port connectable to the secondary pipe;a shut-off member capable of moving at right angles to the main pipe between,a first closed position, in which the shut-off member comprises a first orifice, of a diameter identical to that of the upstream port and downstream port, positioned in line with the upstream port and downstream port, so as to allow fluid to pass through the main pipe and inhibit fluid from passing from the main pipe to the secondary pipe, anda second open position, in which the shut-off member comprises a second orifice opening toward the upstream port and toward the third connection port, so as to place the upstream port and the secondary pipe in fluid communication and inhibit fluid from passing to the downstream port; andwherein the diameter of the upstream port and the downstream port are sized to allow a scraper to pass there through to permit cleaning there between when the shut-off member is in the first closed position and the second orifice of the shut-off member comprises means for preventing the scraper, coming from the upstream port, from entering the second orifice when the shut-off member is in the second open position.2. The valve of claim 1 further comprising sealing means arranged between the upstream port and the shut-off member, and between the downstream port and the shut-off member, to provide sealing between the main and secondary pipes in both positions of the shut-off member.3. The valve of claim 1 wherein the shut-off member comprises two flat faces in the regions facing the upstream port and the downstream port.4. The valve of claim 2 wherein the sealing means comprise O-rings.5. The valve of claim 1 further comprising at least one rinsing nozzle located in the third connection port and able to shower the region where the third port and the main pipe meet.6. The valve of claim 5 wherein one of the nozzles is directed into the position that the scraper occupies when the scraper comes into contact with the means preventing it from entering the second orifice.7. The valve of claim 1 wherein the shut-off member is moved by an actuator isolated from the body of the valve.