JP2013230749A - Cargo lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve damage stability, and to stably lift powder and granular material from a hold.SOLUTION: A cargo lifting device includes a bucket elevator which is provided to a powder and granular material carrier to transfer cargoes such as powder and granular materials in a vertical direction, a flow conveyor which is connected to the bucket elevator to transfer the powder and granular materials or the like toward the lower end side of the bucket elevator, an air slider 141 for transferring the powder and granular materials in a hold toward the flow conveyor, and a mountain-shaped powder and granular material stagnation preventive device 142. An air slider 421 is provided on the upper surface of a slope of the mountain-shaped powder and granular material stagnation preventive device.

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 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. .

  The unloading apparatus according to the present invention is a loading apparatus that 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 unloads the granular material from within the cargo space, Vertical transfer means for vertically transferring the granular material transported from the cargo compartment partitioned so that the interior is watertight by the bulkhead, and so as to penetrate in the longitudinal direction of the granular material carrier ship at the center of the bottom of the cargo hold A horizontal transfer means that is arranged and connected to the vertical transfer means and horizontally transfers the powder particles in the hold toward the lower end side of the vertical transfer means, and is inclined toward the bottom center of the bottom of the hold And a transfer means in the hold for transferring the particles in the hold toward the horizontal transfer means, and the transfer means in the hold is at a predetermined interval along the horizontal transfer means on both sides of the horizontal transfer means at the bottom of the hold. And the accumulated powder fluid is transferred horizontally. Discharge transfer means extending in the width direction of the hull to be transferred to the means, and a mountain-shaped powder fluid provided with slope plates provided along the drop transfer means and inclined to the transfer means on both sides of the drop transfer means It is characterized in that it comprises a stagnation preventing means, and on the upper surface of the inclined plate of the pulverized fluid stagnation preventing means, there is provided a wiping means for spilling the pulverized fluid deposited on the inclined surface of the pulverized fluid pool preventing means.

  Moreover, the connection part of the horizontal transfer means and the transfer means in a cargo hold may be connected by the watertight means so that closure is possible. Further, the drop-off transfer means and the drop-off means may be air sliders. Further, the wiping-off means includes an air supply port formed in a part of the slope plate and a plurality of air supply ports extending in the longitudinal direction of the slope plate provided on the upper surface of the slope plate so as to communicate with the air supply port. And an air chamber and a canvas that covers the upper surfaces of the air chamber and the slope plate. The vertical transfer means may be a vertical bucket elevator or a vertical screw conveyor, and the horizontal transfer means may be a flow conveyor.

  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 side sectional drawing which shows the structure of the ship bottom of the granular material carrier ship to which the same unloading apparatus is applied. It is an expanded sectional view seen from AA 'of FIG. 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 carrier 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.

  Furthermore, the unloading device 100 is provided at the bottom 2a of the hold 2 so as to incline toward the center 2c of the bottom, and is provided with a transfer means 140 in the hold for transferring the granular material in the hold 2 toward the flow conveyor 120. . A plurality of the in-hull transfer means 140 are provided at predetermined intervals along the flow conveyor 120 on both sides of the flow conveyor 120 at the bottom of the hold, and the powdered fluid is accumulated by extending in the width direction of the hull at a certain inclination angle from the dredging wall. The air slider 141 is a dispensation transfer means for transferring the air to the flow conveyor 120, and mountain-shaped powder fluid accumulation prevention 142 provided along the air slider 141 on both sides of the air slider 141. Further, a watertight extraction gate 130 capable of watertightly closing the connection portion is provided at a connection portion between the flow conveyor 120 and the air slider 141, respectively.

  As shown in FIGS. 5 and 6, the mountain-shaped pulverized fluid accumulation prevention 142 has a function of removing the accumulated pulverized fluid to the air slider 141, as shown in FIGS. 5 and 6. A slider 421 is provided. The air slider 421 is attached to an inclined plate 211 having an air supply port 211a for supplying compressed air, and is attached to the center of the upper surface of the inclined plate 211 so as to extend fully in the longitudinal direction of the projection plate 211, and the air supply port 211a. A rectangular air chamber 212 having air supply holes 212a for distributing compressed air supplied from the side surface (or the side surface and the upper surface), and the air chamber 212 and the upper surface of the projecting plate 211 are provided to cover the air chamber 212. And a canvas 213 formed of a woven cloth or the like that allows compressed air to pass and does not allow powdered fluid to pass through, and a fixing portion 214 that fixes the canvas 213 to the slope plate 211.

  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 7 and the stern portion 8, 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 sliders 141 for holding means, and powder particles that are provided in the center 2c of the bottom of each hold 2 and have been transported in the hold 2 in the horizontal direction in the width direction of the hull by the air slider 141. 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 sliders 421 and 141 include 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 to the space formed by the slope plate 211 and the canvas 213 of the air slider 421 and the air slider box 411 of the air slider 141 via the air supply valve. It is blown into the hold 2 through the slider canvases 213 and 412. The compressed air supplied to the air slider 421 inflates the canvas 213 and is blown out from the entire canvas 213, so that the powder fluid staying on the projecting surface plate 211 is not present, and the powder fluid is transferred to the air slider 141. It can be scraped out efficiently. 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 141 to the flow conveyor 120 is disposed at a connection portion between the flow conveyor 120 and the air slider 141. The watertight extraction gate 130 is constituted by a knife gate valve or a butterfly valve having an electric or pneumatic cylinder.

  The air slider 141 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, so that the granular material in the fluidized 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 141 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 141 are connected by the watertight extraction gate 130 even if each hold 2 is communicated with 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. In addition, the flow conveyor 120, the air slider 141, the bucket elevator 110, and the like are of the existing structure, and the unloading device 100 is realized simply by newly installing only the watertight extraction gate 130 and the powder fluid accumulation prevention 142. Therefore, it can be configured at low cost.

  Further, the unloading apparatus 100 according to the present embodiment is provided with a powder fluid accumulation prevention 142 having an air slider 421 on an inclined surface in the hold 2, so that it is easy to dispense, so that the granular material is removed from the hold. It becomes possible to unload stably. In addition, the air slider 421 has an air supply port 211a formed in the existing projection plate 211 made of a mountain-shaped steel plate, and an air chamber 212 provided on the projection plate 211 so as to cover the air compression port 211a. The upper surface is covered with a canvas 213, and a compressed air introduction pipe is connected to at least one location below the projection plate 211. For this reason, the water-tightness from the lower side of the surface plate 211 can be ensured, and this can also prevent the ingress of seawater.

  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 141. 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 connecting the flow conveyor 120 and the air slider 141 becomes unnecessary, and the lifting device 100 that improves the stability at the time of damage with a simpler structure is realized. can do.

  FIG. 7 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. 7, in the present embodiment, the air chamber 312 constituting the air slider 422 is not rectangular but semi-cylindrical. When such an air chamber 312 is used, in addition to the same effects as in the previous embodiment, there is an effect that the strength is also strong.

  With such a configuration, watertightness from the lower side of the projection plate 211 can be ensured with little modification, and the powder fluid can be scraped out efficiently.

1 Granule carrier 2 Funakura (hold)
2a bottom 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 unloading device 110 bucket elevator 120 flow conveyor 130 extraction gate 140 in-carrying means 141 air slider 142 powder fluid reservoir Prevention 211 Slope plate 212 Air chamber 213 Canvas 214 Fixed part

Claims (5)

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 transfer means in the cargo hold is
A plurality of disposing transfer means which are provided at a predetermined interval along the horizontal transfer means on both sides of the horizontal transfer means at the bottom of the hold and extend in the width direction of the hull for transferring the accumulated powdered fluid to the horizontal transfer means; ,
A mountain-shaped powder fluid accumulation preventing means provided with projecting plates provided along the drop-off transfer means and inclined on both sides of the drop-off transfer means toward the drop-off transfer means;
The lifting device according to claim 1, further comprising: an upper surface of the projecting surface plate of the powder fluid accumulation preventing means provided with a dropping means for removing powder fluid deposited on the inclined surface of the powder fluid accumulation preventing means.   The unloading apparatus according to claim 1, wherein a connecting portion between the horizontal transfer means and the in-house transfer means is connected to be closed by a watertight means.   The unloading apparatus according to claim 1 or 2, wherein the drop-off transfer means and the drop-off means are air sliders. The withdrawal means is
An air supply port formed in a part of the surface plate;
An air chamber having a plurality of air supply holes extending in the longitudinal direction of the projecting surface plate provided on the upper surface of the projecting surface plate so as to communicate with the air supply port;
The unloading apparatus according to claim 1, further comprising: a canvas that covers an upper surface of the air chamber and the projecting plate. The vertical transfer means comprises a vertical bucket elevator or a vertical screw conveyor,
The said horizontal transfer means consists of a flow conveyor. The loading apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.

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