JPS5821831Y2 - Nozzle device for reslurrying consolidated cargo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle device for reslurrying consolidated cargo.

When crude iron ore is transported by sea, it is loaded into the hold of a slurry carrier in the form of a slurry at the loading port.

During the transport voyage, the slurry loaded in the ship's hold settles due to the difference in specific gravity between the crude ore and the water, becoming dehydrated and consolidated.

Therefore, a reslurry device for consolidated cargo is installed in the hold for the purpose of unloading such compacted cargo.

This re-slurrying device is provided with a fluid injection nozzle on the bottom plate of the cargo hold, and the fluid injection nozzle is usually rotatable around a vertical axis.

However, since such fluid injection nozzles have a fixed injection angle within a horizontal range or a few degrees,
The so-called line excavation method uses a water jet to excavate only the same height portion of the thick consolidated cargo layer.

In contrast, the present invention aims to increase the amount of excavation of consolidated cargo by performing wide area excavation by randomizing the spray angle of the water jet from the nozzle.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 denotes a hold of a slurry carrier, and a re-slurry nozzle device 3 according to the present invention is provided at one or several places on a double bottom inner plate constituting a bottom plate 2 of the hold.

To reslurry the consolidated cargo 4 in the hold, a water jet 6 is injected from the fluid injection nozzle installed in the nozzle block 5 of the reslurry nozzle device 3, thereby excavating the surrounding consolidated cargo 4 and reslurrying it. After turning into a slurry and flowing the resulting slurry into the well 7, it is unloaded through the unloading pipe 8.

In FIGS. 2 and 3, the nozzle block 5 has a well 7
The distal end of the ejected fluid conduit 9 is connected to the distal end of the ejected fluid conduit 9 provided through the conduit so as to be rotatable around the axis of the distal end portion 10 of the conduit. A pair of nozzles 11.11 are provided.

That is, these nozzles 11.11 are opened at their proximal ends inside the nozzle block 5, and the nozzle flocks 5
The distal end thereof is opened at the side wall portion of the nozzle block 5, and the fluid ejection direction is partially shifted by an angle θ with respect to the radial direction of the nozzle block 5.

On the other hand, the ejected fluid conduit 9 is disposed on the vertical axis X except for the tip 10, and its lower end is connected to a rotary drive device (not shown) outside the well 7.

The tip end portion 10 of the conduit is inclined at a certain angle with respect to the vertical axis X.

In the above description, it is assumed, for example, that the pair of nozzles 11.11 are provided so as to be inclined at a predetermined angle to the left and right with respect to the axis Y of the conduit tip portion 10.

When reslurrying the consolidated cargo 4 with the configuration, supplying pressurized water to the nozzle block 5 through the conduit 9 while rotating the ejection fluid conduit 9 around the vertical axis X by the rotary drive device, When jetted from the water jets #11, 11, the consolidated cargo 4 is reslurried and unloaded via the well 7 through the discharge pipe 7A or the unloading pipe 9.

At this time, the nozzle block 5 rotates around the axis Y of the tip end of the conduit as indicated by arrow 2 in FIG. 3 due to the reaction force of the fluid ejection pressure.

During re-slurrying, the nozzle block 5 revolves around the vertical axis X while rotating around the axis Y of the tip end of the conduit.

In this way, surface excavation of the consolidated cargo 4 becomes possible within the range indicated by the angle α in FIG.

If the nozzle block 5 is simply rotatably connected to the tip of the conduit as in the embodiment described above, the reaction force of the fluid ejection pressure will be too large and the number of revolutions will be higher than necessary, resulting in There is a risk that the dispersion will increase and the excavation capacity will decrease.

To address this concern, a brake device 12 may be installed between the nozzle block 5 and the conduit tip 10 in order to control the number of rotations of the nozzle block 50, as shown in FIG.

FIG. 5 shows another rotational speed control means.

This is achieved by fixing a gear 13 to the lower part of the nozzle block 5, meshing this gear 13 with a meshing gear 15 provided at the center of a grid plate 14 disposed at the upper opening of the well 7, and increasing the number of revolutions of the conduit by 90 revolutions. The nozzle flock 5 is rotated at a constant ratio to the rotation speed of the nozzle block 50, and thereby it is possible to completely control the number of revolutions of the nozzle block 50 artificially.

As shown in Fig. 5, replace the gear 13vc with a friction wheel.
The rotation of the conduit 9 may be transmitted to the nozzle block 5 by using an annular friction surface instead of the mesh gear 15.

The present invention can be implemented as described above. According to the present invention, the spray angle of the water jet from the nozzle is randomized, so that the amount of excavation of consolidated cargo can be increased and the unloading efficiency can be improved.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a cross-sectional view of a slurry carrier, FIG. 2 is a vertical side view of a re-slurrying device 3, and FIG. 3 is a nozzle block 5. FIG. 4 is a side view of essential parts of a modified example, and FIG. 5 is a vertical sectional side view of another modified example. 1... Ship hold, 2... Hold bottom plate, 3... Re-slurry device, 4... Consolidated cargo, 5... Nozzle flock,
6...Water jet, 7...Well, 9...Ejection fluid conduit, 10...Ejection fluid conduit tip, 11...Nozzle.

Claims (1)

[Scope of utility model registration request] The distal end of a jetting fluid conduit arranged on a vertical axis and rotatable around the axis is inclined at a certain angle with respect to the vertical axis, and the distal end of the conduit is provided with a 1. A nozzle device for reslurrying consolidated cargo, characterized in that a nozzle block is rotatably connected and connected, and the conduit is connected and connected to a rotational drive device.