JPH01214510A - Underwater storing device for bulk material - Google Patents

Abstract

PURPOSE:To aim at improvement of the stability of a vessel by dividing the inside of the storage vessel floated underwater into, upper and lower, a storage chamber and a ballasting chamber, detecting the underwater level of the vessel and supplying/deliverying water to the ballasting chamber based on a detected valve. CONSTITUTION:The level of the surface of the water with respect to a storage vessel body 10 is measured by a level sensor S to be input to a controller. The controller calculates the inclination of the vessel under a preset procedure to supply/discharge water to each small chamber not shown in a figure of the ballasting chamber 16 for correcting the inclination. According to like this construction, the vessel is kept in a stable attitude.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an underwater storage device for powder and granular materials.

(Prior Art) Storage devices for powder and granular materials, such as coal and grain, are often transported by ships, so they are often stored in places close to the coast,
They are commonly constructed underwater.

In this case, from the perspective of effective use of national land, it is desirable to construct the storage device underwater, but considering the stability of the storage device built underwater, the foundation should be built on the seabed.
Since the storage container itself would have to be built on top of it, there were problems in that the construction period would be long, and the deeper the seabed, the more expensive it would be to construct the foundation.

For such problems, for example, Japanese Patent Laid-Open No. 51-10
As disclosed in Japanese Patent No. 4618, it is conceivable to store powder in a storage container floated in the sea.

However, storing powder and granular materials in storage containers floated in the sea has the following problems.

(Problem to be Solved by the Invention) In other words, in the storage of powder and granular materials, compared to the storage of crude oil, petroleum, etc. shown in the above-mentioned publication, they are carried in and out much more frequently. As a result, the total weight including stored items fluctuates greatly.

For this reason, for example, as disclosed in the above publication,
There was a problem in that simply mooring the storage container to the seabed soil did not ensure its stability.

This invention was made in view of these conventional problems, and its purpose is to provide a powder that can reliably maintain stability even when stored powder and granules are frequently brought in and out. An object of the present invention is to provide an underwater storage device for granules.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a storage container main body floated in water, a storage chamber vertically separated inside the storage container, and a buoyancy an adjustment chamber, a loading/unloading device for loading and unloading powder and granular material provided in the storage chamber, and a pump for supplying and draining water provided in the buoyancy adjustment chamber;
The storage container body includes a level sensor installed in the storage container body, and a control device that controls the amount of water supplied and discharged by the pump based on the output value of the level sensor corresponding to the amount of powder and granular material stored in the storage chamber.

(Function) According to the underwater storage device configured as described above, the level sensor constantly measures the floating level of the storage container body, and the water supply and drainage pump in the buoyancy adjustment chamber is controlled based on this measurement value. stability is ensured.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of an underwater storage device for powder and granular materials according to the present invention.

The storage device shown in the figure includes a storage container body 10 formed of reinforced concrete in a rectangular shape, and a storage container body 10 formed of reinforced concrete in a rectangular shape.
A partition wall 12 is installed that separates the interior vertically, and includes an upper storage chamber 14 and a lower buoyancy adjustment chamber]6.

The storage container main body] 0 consists of a side wall 18, a bottom plate 20 and a top plate 22 fixed to both ends thereof, and is moored to the seabed ground by an anchor wire 24 attached to the lower part of the side wall 18. .

In the storage room 14, a carry-out device 26 for carrying out the powder or granular material A to the outside, and a carry-in device 28 for carrying the powder or granular material A into the interior are installed.

The unloading device 26 includes a hollow cylindrical body 30 that penetrates the top plate 22 of the container body 10, has a lower end on the upper surface of the partition wall 12, and is erected on the central axis of the storage chamber 14, and is installed within this hollow cylindrical body 30. It is generally composed of a packet conveyor 32 and an output conveyor 34 installed at the upper end of the packet conveyor 32.

An intake port 36 that opens into the storage chamber 14 is formed at the lower end of the hollow cylindrical body 30, and a discharge port 37 is formed at the upper end for supplying the granular material A to the discharge conveyor 34.

Moreover, on the partition wall 12 in the storage chamber 14, there is a slope 38 whose inclination angle is slightly larger than the angle of repose of the powder or granular material A to be stored.
It is formed to face the intake port 36.

As shown in FIG. 2, four packet conveyors 32 are installed in this embodiment, and each bucket/soto conveyor 32 is
The powder and granular materials A taken out are merged and received by a carry-out conveyor 34.

The carrying-in device 28 includes eight carrying-in feeders 40 that are provided so as to surround the outer periphery of the carrying-out device 26 arranged at the center of the storage room 14, and a branch conveyor 42 that supplies powder and granular material A to each feeder 40. , a distributor 44 installed at the merging portion of the branch conveyor 42 , and a carry-in conveyor 46 that supplies the powder and granular material A to the distributor 44 .

In this embodiment, the incoming feeder 40 includes a hopper 48 and
It is composed of an umbrella-shaped canopy 50 and a cylindrical body 52 that is rotationally driven by a motor (not shown). 1
Due to the structure of the carry-in feeder 40 and its arrangement with respect to the storage chamber 14, the powder and granular material A carried into the storage chamber 14 is gradually distributed from below in a substantially uniform manner. Deposits at the level.

On the other hand, as shown in FIG. 3, the buoyancy adjustment chamber]6 has a lattice-shaped partition wall 54 fixedly installed between the bottom plate 20 and the partition wall]2, and has 16 small chambers R1 having approximately the same volume. ~R16, and each of the small chambers R1~R16 is provided with suction pumps P1~P16 for sucking water, and drain pumps P20''-P35 for discharging water.

In the vicinity of the upper end of the side wall 18 of the storage container main body 10, the center and three sides of each side wall 12 are located on the four sides of each side wall 12.
A level sensor S-Sl is installed at the location.

The level sensors S1 to S12 are, for example, ultrasonic sensors, which receive reflections of ultrasonic waves projected onto the water surface, and measure the level of the storage container body 10 relative to the water surface based on the time difference between projection and reception.

The above water suction pump P-P and drainage pump P2o~1
, 16 P and level sensors S1 to S12 are each connected to the control device 56.

The control device 56 is composed of, for example, a microcomputer, and performs arithmetic processing based on the measured values determined by each of the level sensors S1 to S12 to calculate the current inclination of the container body 10. , operate the water pump P2o to forcibly remove the water in the small chamber R, or operate the water suction pump P1 of the small chamber R with a smaller slope to supply water into the small chamber R, Storage container body] 0
maintains the set level.

Such control of the storage container 10 by the control device 56 continues while the powder and granular material A is carried into the storage room by the carrying-in device 28 and also while the powder and granular material A is discharged by the carrying-out device 26. It will be done.

(Effects of the Invention) As explained above in the embodiments, in the underwater storage device for powder and granular materials according to the present invention, the level sensor constantly measures fluctuations in the level of the storage container body as the powder and granular materials are carried in and out. However, based on this measured value, the level of the container body is controlled by supplying and draining water in the buoyancy adjustment chamber, so the container body can be kept in a stable state even when powder and granules are frequently carried in and out.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view showing an embodiment of an underwater storage container for powder and granular materials according to the present invention, FIG. FIG. 4 is a block diagram of the control system. 10......Storage container body 12...
......Bulkhead 14...Storage chamber 16...Buoyancy adjustment chamber 26...
......Carry-out device 28...Carry-in device 56...Pa...Control device A... Powder P, ~P1o... Water suction pump

Claims (1)

[Claims] A storage container main body floated in water, and a storage chamber and a buoyancy adjustment chamber formed vertically and separated inside the storage container, and the powder and granular materials provided in the storage chamber are carried in and out. a loading/unloading device, a pump provided in the buoyancy adjustment chamber for supplying and draining water, a level sensor installed in the storage container body, and a level sensor corresponding to the amount of powder and granular material stored in the storage chamber. An underwater storage device for powder and granular material, comprising: a control device that controls the amount of water supplied and discharged by the pump based on the output value of the pump.