SE464125B - SYSTEM FOR FLUIDIZATION OF BULK MATERIAL - Google Patents

Description

464 125 10 15 20 25 30 35 2 specially built bulk carriers. This rebuilding requires mainly due to the large mass of the new cargo hold bottom, extensive reinforcement work on the ship. To this reinforcement work also comes the very time-consuming and complicated work of building the new bottom.

If and when these cargo vessels eventually may have to be used, for example, as general cargo vessels again, the "fluidisation bottom" must either be dismantled or supplemented with a flat "piece cargo bottom". Regardless, this is also a costly and time-consuming job.

The main object of the invention is to provide a system of the type indicated in the introduction for quick and easy and thereby considerably cheaper conversion of cargo ships with a flat "piece cargo bottom" to cargo ships with a sloping "fluidization bottom" and vice versa.

This main object is achieved by several blocks of light construction quickly and easily dismountable mounted on the bottom of the space (cargo space), each block having an upper side forming a slide and long, short and bottom sides.

In this case, the long and short sides are suitably formed of thin cover plates and the panel and cover plates limit a cavity which is filled with a body of light material, for example polyurethane foam plastic. In the upside-down position, the cavity then suitably forms the shape for the production of the foam plastic body.

Among the advantages of the system according to the invention can be mentioned the great flexibility, ie the great adaptability to the shape and size of the cargo space of the ship in question. In addition, the blocks included in the system mentioned are very quick and easy to assemble and disassemble. The only work required on the load compartment bottom is the attachment of a number of mounting ears or the like for mounting brackets for the blocks. Because each block has a body of foam plastic, a very light construction is obtained, about 50 kg / m3. 10 15 20 25 30 35 464 125 3 Because the bottom of the foam body in a preferred embodiment forms the bottom side of the block and abuts directly against the bottom of the space, its shape can be followed exactly for distribution and equalization of the static load over the entire bottom of the space without regard to fine bottom construction.

Last but not least, the manufacturing and installation time is short compared to conventional systems, which means lower costs and shorter time for the ship at shipyards.

The invention is described in more detail below with reference to the accompanying drawings, which show a presently particularly preferred embodiment thereof in a cargo ship. Fig. 1a shows diagrammatically in perspective an example of the principal construction of the system for installation in a cargo space shown in Fig. 1b. . Fig. 1c shows a section along the line I-I in Fig. 1b. Fig. 2 shows in a projection corresponding to Fig. 1a the structure of the system in more detail. Fig. 3 shows blocks included in the system from above. Fig. 4 shows a side projection from the line IV-IV in Fig. 3. Fig. 5 shows a section along the line V-V in Fig. 3. Fig. 6 shows a section along the line VI-VI in Fig. 3.

The system generally indicated by 1 in the drawings for fluidizing such bulk material as cement, bentonite, burite, starch, etc. in a ship's hold 2 cargo spaces 3 for emptying them comprises as main component several on the bottom 4 of the cargo holds 3, preferably disassembled close to each other. mounted, transverse and longitudinal blocks 5.

Each block 5 has on its upper side 6 an inclined sliding channel 7, which is suitably built up of a trapezoidal corrugated sheet metal panel 8 with channels 10, connected to supply lines (preferably compressed air), via supply lines 9, these channels 10. the embodiment shown of the wave valleys of the trapezoidal corrugated sheet metal panel 8. A gas-permeable layer 11 in the form of a fine-mesh net and / or a fabric covers the associated panel 8. When supplying compressed air or other gas, it flows via the supply lines 9 and the channels 10 in the panel 8 out through the layer. l1 to fluidize the bulk material and by gravity move this material to at a lower level existing outlet points l2 for emptying the respective cargo space 3.

In addition to the upper side 6 of the block 5 forming the sliding channel 7, each block also has two long sides 13, two short sides 14 and a bottom side 15. The long and short sides 13, 14 are formed of thin cover plates 16 of sheet metal, these cover plates together with the panel 8 forming a box construction with a cavity 17. The cavity 17 is for giving the block 5 strength and braced without for that reason make the block heavily filled with a body 18 of foam plastic. The foam body 18 can then be made more or less porous according to the requirements and preferably consists of polyurethane.

For the production of the foam body 18, the cavity 17 is suitably used as a mold. More specifically, the panel 8 and the cover plates 16 are used as mold sides in the upside-down position of the block 5. The bottom side 15 of the block 5 is formed by the bottom 19 of the foam plastic body 18. irregularities in the bottom 4 and distribution of the static load towards the bottom. As an alternative to a body 18 of foam plastic, the body may consist of other light material, for example aerated concrete, cement-bonded, fired expanded clay or the like.

The blocks 5 are quickly and easily disassembled mounted on the bottom 4 of each cargo space 3 by means of drawbars 20, which extend through the narrow gaps 21 between two adjacent blocks 5. The drawbars 20 are anchored at their lower end i attached to the bottom 4 ears 22 or similar and have an upper threaded end. Clamping washers 23 are clamped by means of nuts 24 on the upper end of the rods 20 and nuts 25 on respective blocks 5 belonging to the respective blocks 5 against the blocks to fix them in position.

The invention has been described above with special reference to use in ships' cargo holds, but as mentioned in the introduction there is no obstacle to using the invention in other contexts where it is a question of storage and transport of bulk material in containers of various kinds.

Claims (3)

10 15 20 25 464 125 PATENT REQUIREMENTS 1. l. System for fluidisation of bulk material in such spaces as cargo spaces (3) in ships (2), storage and transport containers, etc., which system (1) comprises inclined sliding channels (7) for the bulk material on the space (3) bottom (4), each sliding channel (7) having a panel (8) with channels (10) or openings connected to a pressurized gas source and a gas-permeable layer (11) covering the panel (8) for fluidizing the bulk material and moving it by gravity. to at a lower level existing outlet points (12) for emptying the space (3), and several blocks (5) of light construction dismountably mounted on the bottom (4) of the space (3), each block (5) having an upper side (6) forming its own sliding channel (7) and long, short and bottom sides (l3, l4, l5), where the long and short sides (l3, l4) are formed by thin cover plates (16) and where the cover (8) and the cover plates (16) form a drawer construction with a cavity (17), characterized in that the cavity (17) is filled with a body (18) of light material and of the fact that the bottom (19) of the body (18) forms the bottom side (15) of the block (5) abuts directly against the bottom (4) of the space (3) in order to follow its shape and thereby distribute the static load thereon. System according to claim 1, characterized in that the light material in the body (18) is foam plastic, preferably polyurethane. 3. A system according to claim 2, characterized in that the cavity (17) in the upside-down position of the block (5) forms a shape for the production of the foam body (18).