JPWO2013132579A1 - Lifting equipment - Google Patents

Abstract

The unloading device 100 is provided in the granular material carrier 1, and is disposed so as to penetrate the bucket elevator 110 that transports cargo such as granular materials in the vertical direction and the bottom center 2c of the hold 2 in the longitudinal direction of the hull. In addition, the flow conveyor 120 is connected to the bucket elevator 110 and transports cargo such as powder particles horizontally toward the lower end side of the bucket elevator 110, and the bottom 2 a of the hold 2 is inclined toward the bottom center 2 c. And an air slider 140 that transfers the powder particles in the hold 2 toward the flow conveyor 120. The granular material carrier 1 includes a plurality of watertight holds 2, and watertight extraction gates 130 capable of watertightly closing the connection portions are provided at connection portions of the flow conveyor 120 and the air slider 140, respectively.

Description

  The present invention relates to a powder carrier for carrying cargo of inorganic particles such as cement, fly ash, calcium carbonate (tankal), slag, clinker and the like, and cargo of organic particles including grains. The present invention relates to an applicable lifting device.

  2. Description of the Related Art As a cargo carrier that carries a cargo of granular materials such as cement, fly ash, tankal, slag, clinker, and cereal, for example, a powder carrier disclosed in Patent Document 1 below is known. This powder transport ship has, as a ship bottom structure, an inclined part provided with a cloth material toward a powder introduction path at the center of the bottom part in a plurality of compartments, and blows out compressed air from the bottom part of the cloth material. Thus, the fluidity of the fluid is ensured and the structure for transporting it to the powder introduction path is provided.

  The powder guided to the powder introduction path by the compressed air is conveyed in the front-rear direction of the hull by a conveyance conveyor provided in the powder introduction path, and is unloaded after being conveyed to the cellar pump by the vertical transfer means. . From these facts, it can be said that this powder transport ship has a cargo holding device constituted by a partitioned cargo hold, a ship bottom structure, a powder introduction path, a transfer conveyor, and the like.

JP 2002-356194 A

  However, in the conventional powder transport ship disclosed in Patent Document 1, the powder introduction path constituting the unloading device has a structure extending in the front-rear direction of the hull through a plurality of holds. For this reason, there is a problem that the stability upon damage (damage stability: DS) is not good.

  That is, for example, when seawater enters and floods at least one of the plurality of holds, the seawater reaches each hold via the powder introduction path, and all the holds are flooded. In addition to being unable to handle the powder loaded in the product as a product, the stability when damaged is not good.

  An object of the present invention is to provide a lifting device that solves the above-described problems caused by the prior art, has good stability when damaged, and can stably lift a granular material from a hold. .

  An unloading apparatus according to the present invention is an unloading apparatus that is installed in a granular material carrier ship that loads and transports a granular material in a plurality of compartments, and unloads the granular material from within the cargo space. A vertical transfer means for vertically transferring the granular material transported from the inside of the hold partitioned by the bulkhead to be watertight, and a hull front-rear direction of the granular material transporting ship at the center of the bottom of the hold A horizontal transfer means which is disposed so as to pass through and connected to the vertical transfer means, and which horizontally transfers powder particles in the hold toward the lower end side of the vertical transfer means, and at the bottom of the hold A connecting means for transferring the granular material in the hold toward the horizontal transfer means, which is arranged so as to be inclined toward the center of the bottom, and connecting the horizontal transfer means and the transfer means in the hold The part can be closed by watertight means It is characterized in that is.

  In one embodiment of the present invention, the vertical transfer means is a vertical screw conveyor or a vertical bucket elevator, the horizontal transfer means is a flow conveyor, and the in-ship transfer means is an air slider.

  ADVANTAGE OF THE INVENTION According to this invention, the stability property at the time of damage is favorable, and a granular material can be stably unloaded from a hold.

It is side sectional drawing which shows the structure of the granular material carrier ship to which the unloading apparatus which concerns on one Embodiment of this invention is applied. It is an upper top view which shows the structure of the granular material carrier ship to which the unloading apparatus is applied. It is width direction sectional drawing which shows the structure of the granular material carrier ship to which the unloading apparatus is applied. It is a width direction expanded sectional view which shows the structure of the granular material carrier ship to which the unloading apparatus is applied. It is a partially expanded sectional view which shows the structure of the granular material carrier ship to which the unloading apparatus which concerns on other embodiment of this invention is applied.

  Hereinafter, a lifting device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side sectional view showing a structure of a granular material carrier ship to which a loading device according to an embodiment of the present invention is applied. FIG. 2 is an upper plan view showing the structure of the granular material carrier ship to which the unloading apparatus is applied. FIG. 3 is a cross-sectional view in the width direction of this granular material carrier ship, and FIG. 4 is an enlarged cross-sectional view thereof.

  As shown in FIGS. 1 to 4, the unloading device 100 is provided in the granular material carrier 1. For example, the unloading apparatus 100 is configured to receive granular materials such as cement, fly ash, calcium carbonate (tankal), slag, clinker, and other inorganic materials, grains, and the like loaded in the hold 2 which is a hold of the granular material transport ship 1. It includes a bucket elevator 110 that is a vertical transfer means for transferring cargo such as organic material particles and the like in the vertical direction.

  The unloading device 100 is disposed at the bottom center 2c of the hold 2 so as to penetrate in the front-rear direction of the hull of the granular material transport ship and is connected to the bucket elevator 110. The flow conveyor 120 of the horizontal transfer means which transfers to a lower end side in a horizontal direction is provided.

  Further, the unloading device 100 is disposed on the bottom 2a of the hold 2 so as to incline toward the center 2c of the bottom, and is an air slider of a transfer means in the cargo hold for transferring the granular material in the hold 2 toward the flow conveyor 120. 140. Further, watertight extraction gates 130 capable of watertightly closing the connection portions are provided at the connection portions of the flow conveyor 120 and the air slider 140, respectively.

  Here, the granular material carrier 1 includes a ballast tank 4 disposed on a hull bottom plate 3 constituting a ship bottom in this example, and a bottom plate 4a of a hold 2 that is an upper plate of the ballast tank 4, Between the bow part 6 and the stern part 7, for example, eight holds 2 are provided which are divided by four in the hull longitudinal direction and two in the hull width direction. These holds 2 are partitioned by a partition wall 2b in a watertight state in the front-rear direction and the width direction of the hull.

  The loading device of the granular material carrier 1 includes, for example, a central distribution tank 152 connected via a receiving air slide 150 for receiving cargo (load) loaded in the hold 2 from the land to the granular material carrier 1, A distribution air slide 153 connected to the distribution tank 152, a hold loading portion 154 branched from the distribution air slide 153, and the like are provided.

  The central distribution tank 152 is disposed substantially at the center in the front-rear direction of the hull. Four distribution air slides 153 are provided so as to extend from the central distribution tank 152 in the direction of the bow portion 6 and the stern portion 7 and to be inclined downward in these directions from the central distribution tank 152 side. The hold loading part 154 provided at the upper part of the center distribution tank 152 and the central distribution tank 152 are connected.

  A hold loading portion 154 connected to the distribution air slide 153 is provided for each hold 2, and by opening the gate 155 provided between the hold loading portion 154 and the distribution air slide 153, A granular material such as cement falls into the hold 2 immediately below the hold loading portion 154 and is loaded. At this time, since the powder particles fall into the hold 2 in a fluidized state, the loading surface is almost leveled.

  The structure of the central distribution tank 152, the distribution air slide 153, and the like are well known, and detailed description thereof is omitted here. However, for example, an inclined canvas is disposed in the duct, and the air slide is arranged from below the canvas. Air is supplied to move the powder particles while fluidizing them.

  On the other hand, as shown in FIG. 3, the unloading device 100 of the granular material carrier 1 is transported in the cargo space provided above the air slider mounting bottom plate 5 provided on the bottom plate 4a of the hold 2 as described above. Air slider 140 for holding means, and powder particles provided in the center 2c of the bottom of each hold 2 and transferred in the horizontal direction in the width direction of the hull by the air slider 140 in the longitudinal direction of the hull And a bucket elevator 110 that is connected to, for example, an end of the flow conveyor 120 on the bow portion 6 side and that vertically transfers the granular material transferred by the flow conveyor 120 from the lower end side thereof. Prepare.

  In addition, the unloading device 100 is connected to the seller pump 160 that is disposed in the vicinity of the bucket elevator 110, for example, a plurality of seller pumps 160 in the width direction of the hull, and the seller pump 160 that connects the seller pump 160 and the upper end side of the bucket elevator 110. The feed pipe 161 and a transport pipe (lifting pipe) 162 for unloading the granular material in the cellar pump 160 are provided.

  The air slider mounting bottom plate 5 is installed on the entire surface of the bottom portion 2a of the hold 2 in a watertight structure so that there is no leakage of powder particles from the inside of the hold 2 or intrusion of seawater from the bottom plate 4a side. The air slider 140 includes an air pipe 149 and a plurality of air supply valves (air slider valves) (not shown) disposed in a space between the bottom plate 4a and the air slider mounting bottom plate 5.

  Air supplied from the air pipe 149 is supplied into the air slider box 148 of the air slider 140 via the air supply valve, and blown out into the hold 2 through the air slider canvas 147. Air is supplied into the hold 2 via a plurality of aeration valves connected to at least a part of the air supply valve. The aeration valve is for adjusting the aeration pressure in the hold 2.

  In addition, a watertight extraction gate 130 that is a watertight means for extracting powder particles from the air slider 140 to the flow conveyor 120 is disposed at a connection portion between the flow conveyor 120 and the air slider 140. The watertight extraction gate 130 is constituted by a knife gate valve or a butterfly valve having an electric or pneumatic cylinder.

  Since the air slider 140 is disposed so as to be slightly inclined downward from the bulkhead 2b side of the hull side surface of the hold 2 toward the watertight extraction gate 130, the fluidized granular material in the hold 2 is removed. It is transferred in the direction of the watertight extraction gate 130. The watertight extraction gate 130 is closed by an automatic control device or a manual control device (not shown) to close the connection between the air slider 140 and the flow conveyor 120 in the hold 2 in a watertight manner. As a result, each hold 2 is partitioned in a watertight manner.

  In the unloading apparatus 100 according to the present embodiment configured as described above, the flow conveyor 120 and the air slider 140 are connected by the watertight extraction gate 130 even if each hold 2 is communicated by the flow conveyor 120 in the front-rear direction of the hull. Can be watertight. Therefore, even if seawater enters one of the holds 2, it is possible to prevent water from entering another hold 2 by closing the watertight extraction gate 130. Thereby, the stability at the time of damage can be improved. Moreover, since the flow conveyor 120, the air slider 140, the bucket elevator 110, etc. use the thing of the existing structure, the loading apparatus 100 can be implement | achieved only by newly installing only the watertight extraction gate 130, It can be configured at low cost.

  Instead of the bucket elevator 110, vertical transfer means such as a vertical screw conveyor can be adopted, and a chain conveyor, a horizontal screw conveyor, or the like can be adopted as the flow conveyor 120. Further, the watertight extraction gate 130 is operated as a flow rate adjusting valve for adjusting the flow rate of the granular material to the flow conveyor 120 according to the opening degree, or the flow rate is adjusted by controlling the aeration of the air slider 140. It is also possible to do.

  Further, according to the unloading apparatus 100 according to the present embodiment, the structure of the watertight extraction gate 130 is configured by existing watertight means such as a knife gate valve, and the gate opening shape has various shapes such as a rectangular shape and a circular shape. Therefore, the dead space for the connection between the flow conveyor 120 and the air slider 140 is not necessary, and the unloading device 100 that improves the stability at the time of damage with a simpler structure is realized. can do.

  FIG. 5 is a partially enlarged cross-sectional view showing the structure of a granular material carrier ship to which an unloading apparatus according to another embodiment of the present invention is applied. As shown in FIG. 5, the unloading apparatus 100 </ b> A is further provided with a watertight extraction gate 130 at the connecting portion between the bucket elevator 110 and the flow conveyor 120. Is different.

  With such a configuration, each hold 2 portion and the bow portion 6 can be partitioned in a watertight state, and the stability at the time of damage can be improved. In this case, it is not necessary to provide the watertight extraction gate 130 at the connection portion between the flow conveyor 120 and the air slider 140, but it is more preferable that each hold 2 can be partitioned into a watertight state.

1 Granule carrier 2 Funakura (hold)
2a Bottom portion 2b Bulkhead 3 Hull bottom plate 4 Ballast tank 4a Bottom plate 5 Air slider mounting bottom plate 6 Bow portion 7 Stern portion 100 Lifting device 110 Bucket elevator 120 Flow conveyor 130 Extraction gate 140 Air slider

Claims (2)

It is installed in a granular material carrier ship that loads and conveys a granular material in a cargo compartment partitioned into a plurality of compartments, and is an unloading device that unloads the granular material from the cargo space,
Vertical transfer means for vertically transferring the powder particles carried out from the inside of the hold partitioned so as to be watertight by a partition;
It is arranged at the center of the bottom of the hold so as to penetrate in the longitudinal direction of the hull of the powder carrier, and is connected to the vertical transfer means, and the particles in the hold are directed to the lower end side of the vertical transfer means. Horizontal transfer means for transferring in the horizontal direction;
It is arranged at the bottom of the hold so as to incline toward the center of the bottom, and includes a transfer means in the hold for transferring the powder particles in the hold toward the horizontal transfer means,
The connecting part of the said horizontal transfer means and the said transfer means in a cargo hold is connected so that obstruction | occlusion is possible with a watertight means. The vertical transfer means comprises a vertical screw conveyor or a vertical bucket elevator,
The horizontal transfer means comprises a flow conveyor,
The unloading device according to claim 1, wherein the in-carrying transfer means is an air slider.

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