JP3211318U - Lifting equipment - Google Patents

Abstract

An object of the present invention is to provide an unloading device that has good stability at the time of damage and can stably unload a granular material from a hold. An unloading apparatus is provided on a granular material carrier ship that loads and conveys a granular material in a cargo compartment divided into a plurality of compartments, and unloads the granular material from the cargo space. A vertical transfer means for transferring the granular material carried out from the cargo compartment partitioned so as to become vertical, a through-hole arrangement in the longitudinal direction of the hull in the center of the bottom of the hold and connected to the vertical transfer means. Horizontal transfer means 120 for horizontally transferring the body from the outlet having a rectangular cross-section toward the lower end side of the vertical transfer means, and the bottom of the hold at an angle toward the center of the bottom, and the granular material is moved by airflow. The air slider 140 is fluidized and transferred toward the horizontal transfer means. The outlet and the horizontal transfer means are connected to each other by a watertight square butterfly valve 130 so as to be closed. [Selection] Figure 3

Description

  The present invention is applied to a powder carrier for carrying cargo of inorganic particles such as cement, fly ash, calcium carbonate (tankal), slag, clinker, 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. In this powder transport ship, a box-type air slider having an inclined portion with a cloth material is installed as a ship bottom structure toward a powder introduction path in the center of the bottom of a plurality of compartments. It has a structure for ensuring the fluidity of the powder by blowing compressed air from the bottom of the cloth material of the slider and conveying the powder to the powder introduction path.

  The powder that has been fluidized and conveyed by compressed air and guided to the powder introduction path is conveyed in the longitudinal direction of the hull by a conveyance conveyor provided in the powder introduction path, and further conveyed to the cellar pump by vertical transfer means. It is unloaded. As described above, this powder transport ship is provided with an unloading 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 a powder introduction path communicating with the plurality of holds, and all the holds are flooded. Therefore, there is a problem that the powder loaded in the hold cannot be handled as a product and the stability at the time of damage is not good.

  In order to solve such a problem, it is conceivable to replace the gate valve at the outlet of each hold with a water-tight valve and shut off each hold in a water-tight manner from the powder introduction passage. There were various problems. In other words, the ball valve may bite the granular material into the sliding portion, and the sliding portion may be worn or damaged, which may impair the watertightness.

  In addition, the gate valve may bite the granular material into the sliding portion, and the sliding portion may be worn or damaged, which may impair the watertightness. In addition, since the globe valve has an S-shaped fluid flow, it has a large fluid resistance and requires a large operating force for opening and closing. There is a problem that it is not suitable for blocking the pipeline.

There is no problem with such a known watertight valve, and the watertight valve that can be directly attached to an existing powder transportation ship and can instantaneously shut off the flow of the granular material is a watertight valve. It has not been found until.
In particular, a horizontal transfer means is disposed so as to penetrate in the longitudinal direction of the hull of the granular material carrier ship, and an air slider is provided for fluidizing the granular material in the hold by an air flow and transferring it toward the horizontal transfer means. In the unloading device of a granular material carrier, a watertight valve suitable for achieving watertightness between each hold by installing between an air slider and a horizontal transfer means has not been found so far.

  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 at the time of damage, and can stably lift powder particles from a hold. .

  One aspect of 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 that unloads the granular material from the cargo space, Vertical transfer means for transferring the granular material carried out from the inside of the hold, which is partitioned so as to be watertight inside by a partition wall, and penetrating in the longitudinal direction of the hull of the granular material carrying ship at the center of the bottom of the hold A horizontal transfer means which is arranged to be connected to the vertical transfer means and horizontally transfers the powder particles in the hold from the outlet having a rectangular cross section toward the lower end side of the vertical transfer means. An air slider that is disposed at the bottom of the hold so as to incline toward the center of the bottom, and that fluidizes the granular material in the hold by an air flow and transfers it toward the horizontal transfer means, Exit with rectangular cross section of the hold It said horizontal transfer means provides a unloading apparatus characterized in that it is closed connected by watertight Rectangular butterfly valve.

  Further, in particular, one aspect of the present invention is an unloading device that is installed in a granular material carrier ship that loads and conveys 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 a partition wall so as to be watertight, and a hull of the granular material transporting ship at the center of the bottom of the hold. Taken from the outlet having a rectangular cross section, which is arranged to penetrate in the front-rear direction and is connected to the vertical transfer means, and which is attached to the bulkhead of the hold at an angle downward in the transfer direction. Horizontal transfer means for transferring in the horizontal direction toward the lower end side of the vertical transfer means, and arranged at the bottom of the hold so as to incline downward toward the center of the bottom, and air the powder particles in the hold The inside of the hold is fluidized by the flow An air slider that transports and moves toward the outlet, the outlet having a rectangular cross section of the hold and the horizontal transfer means are connected so as to be closed by a water-tight square butterfly valve. The flow path is all rectangular from the outlet to the inlet of the horizontal transfer means and is inclined downward in the transfer direction, and the watertight butterfly valve is inclined along the flow path of the granular material. The granular material fluidized in the air slider in the open state of the water-tight square butterfly valve is less flowed from the outlet of the hold through the water-tight square butterfly valve to the horizontal transfer means. It is transported without staying in resistance, and in the closed state of the watertight butterfly valve, each hold and the horizontal transport means are shut off in a watertight manner. To provide an unloading apparatus.

In the loading apparatus configured as described above, the vertical transfer means can be a vertical screw conveyor or a vertical bucket elevator, and the horizontal transfer means can be a flow conveyor.
Further, the disk surface of the watertight square butterfly valve may be inclined with respect to a horizontal plane when the valve is open, and may be inclined with respect to a vertical surface when the valve is closed.

  ADVANTAGE OF THE INVENTION According to this invention, the unloading apparatus which has favorable stability at the time of damage | damage and can stably unload a granular material from a hold is provided.

It is side part sectional drawing which shows the structure of a granular material carrier ship provided with the unloading apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure of a granular material carrier ship provided with the unloading apparatus which concerns on one Embodiment of this invention. It is width direction sectional drawing which shows the structure of a granular material carrier ship provided with the unloading apparatus which concerns on one Embodiment of this invention. It is a width direction expanded sectional view which shows the structure of a granular material carrier ship provided with the unloading apparatus which concerns on one Embodiment of this invention. It is a front view which shows the closed state of the watertight butterfly valve attached to the lifting apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the open state of the watertight butterfly valve attached to the lifting apparatus which concerns on one Embodiment of this invention. It is a partially expanded sectional view which shows the structure of a granular material carrier ship provided with the unloading apparatus which concerns on other embodiment of this invention.

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 granular material carrier ship equipped with a lifting device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a widthwise sectional view of FIG.

  As shown in FIGS. 1 and 2, the granular material carrier 1 according to this embodiment includes a ballast tank 4 disposed on a hull bottom plate 3 constituting a ship bottom, and a hold plate that is an upper plate of the ballast tank 4. The bottom plate 4a is further provided, and further, for example, No. 4 divided between the bow portion 6 and the stern portion 7 in the hull longitudinal direction. 1 hold 2A, no. 2 hold 2B, No. 2 3 hold 2C, and no. There are four holds consisting of four holds 2D. These No. 1-No. The 4 holds 2A to 2D are partitioned in a watertight state in the front-rear direction of the hull by the partition 2b.

  No. 1-No. In 4 hold 2A-2D, it flows by the air flow of the granular material of the inorganic material such as cement, fly ash, calcium carbonate (tankal), slag, clinker and the like, and the granular material of the organic material including cereal. Easy cargo is sequentially loaded and loaded via the loading device.

  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 holds 2A to 2D from the land to the granular material carrier 1 A distribution air slide 153 connected to the central 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 in the direction of 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 in the upper part of 2D and the central distribution tank 152 are connected.

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

The unloading device 100 of the granular material carrier 1 according to an embodiment of the present invention is a vertical transfer that sequentially transfers cargo such as granular particles loaded in the holds 2A to 2D in the vertical direction (upward). A bucket elevator 110 is provided as means.
In addition, as shown in FIG. 3, the unloading device 100 is arranged at the bottom center 2c of each of the holds 2A to 2D so as to penetrate in the longitudinal direction of the hull of the granular material carrier ship, and is connected to the bucket elevator 110, A flow conveyor 120 is provided as a horizontal transfer means for transferring a cargo such as a granular material extracted from each of the holds 2 </ b> A to 2 </ b> D toward the lower end side of the bucket elevator 110 in the horizontal direction. As the flow conveyor 120, a chain conveyor or a horizontal screw conveyor can be used.

  Further, as shown in FIG. 3, the unloading device 100 is disposed on the bottom 2a of each hold 2A to 2D so as to incline toward the bottom center 2c, and the granular material in each hold 2A to 2D is compressed air. Is provided with an air slider 140 as a means for transferring in the cargo space that is fluidized and transferred toward the flow conveyor 120. A connecting portion between the flow conveyor 120 and the air slider 140 is provided with a watertight square butterfly valve 130 and a manual valve (not shown) that can close the connecting portion in a watertight manner.

FIG. 5 is a front view showing a state in which the watertight square butterfly valve 130 is closed, and FIG. 6 is a perspective view showing a state in which the watertight square butterfly valve 130 is open.
5 and 6, a watertight rectangular butterfly valve 130 includes a rectangular frame-shaped valve body 11, a disk 12 accommodated in the frame of the valve body 11, and a cylinder 14 (electrically driven) that rotates the disk 12. It is also possible to use a formula.

  As can be seen from FIG. 6, holes (not shown) are formed in the left and right thick portions of the disk 12, and stems 13a and 13b are inserted into these holes. With these stem 13a and stem 13b as the central axes, the disk 12 rotates 90 ° C. as shown in FIG. The stem 13a is connected to the cylinder 14, and the disk 12 is driven to rotate by the cylinder 14 operated by air pressure, hydraulic means or the like.

As a result of studying and testing various valves as water-tight valves provided at the connection between the flow conveyor 120 and the air slider 140, the inventors have found that a water-tight square butterfly valve is optimal, and make the present invention. It came to.
That is, as described above, the ball valve may bite the granular material into the sliding portion, and the sliding portion may be worn or damaged, which may impair the watertightness. Similarly, the gate valve may bite the granular material into the sliding portion, and the sliding portion may be worn or damaged, which may impair the watertightness. In addition, since the globe valve has an S-shaped fluid flow, it has a large fluid resistance and requires a large operating force for opening and closing. There is a problem that it is not suitable for blocking the pipeline.

  On the other hand, the watertight butterfly valve has no sliding parts, so it does not bite the powder and is opened and closed by 90 ° rotation, so the opening and closing stroke is small and the flow path is shut off instantly. It is suitable, and the flow of powder is linear, so it has low resistance, does not require large operating force for opening and closing, and has a large diameter such as extraction of powder from the cargo hold of a transport ship. There is an advantage that it is suitable for blocking a pipeline.

  Therefore, it is conceivable to use a conventionally known round butterfly valve as the watertight valve. However, the round butterfly valve has a problem that it is difficult to mount because the cross-sectional shape of the cargo exit is rectangular. In order to install a round butterfly valve, it is necessary to provide a connection section that changes from a rectangular cross section to a round cross section at the rectangular cross section of the cargo hold outlet. As a result, there is a problem that the cargo volume is reduced.

  Also, especially when a round butterfly valve is installed vertically and a connection is made between the cargo exit and the horizontal transfer means, the height of the bottom of the hold must not be raised in order to increase the height of the cargo exit. As a result, there is a problem that the cargo volume is further greatly reduced. According to the calculations of the inventors, the rate of decrease in the hold reaches 18%.

In this way, when a round butterfly valve is used as a watertight valve, the installation space increases, so the capacity of the hold decreases and it cannot be installed on an existing ship carrier. There is a problem that it costs a great deal of money.
Furthermore, in the round butterfly valve, the flow resistance is large and the granule is connected in the passage of the granule from the rectangular cross-section outlet to the horizontal transfer means inlet through the round butterfly valve. There is also a problem that it tends to stay in the part.

  The present inventors solved all these problems by using a square butterfly valve instead of the round butterfly valve. That is, according to the square butterfly valve, it is not necessary to change the shape of the connecting portion between the flow conveyor 120 and the air slider 140, so that a dead space for connection is not required, and it is troublesome to install the square butterfly valve. Therefore, the lifting device 100 can be realized with a simpler structure, lower cost, and improved stability at the time of damage compared to a round butterfly valve.

  Moreover, according to the unloading apparatus 100 which concerns on this embodiment, since the cross section of the outlet in a general transport ship is a rectangle as mentioned above which has attached the watertight square type butterfly valve 130 to the outlet. In addition, the dead space for the connection between the flow conveyor 120 and the air slider 140 is not necessary, and the lifting device 100 that improves the stability when damaged can be realized with a simpler structure.

  Here, it may seem that it is easy to use a square butterfly valve instead of a round butterfly valve as a watertight valve. However, there has been no idea that a square butterfly valve is used as a watertight valve for blocking the flow of the granular material. This is because the square butterfly valve has a long circumference that seals against the cross-sectional area through which the granular material passes, and the granular material adheres to the long seal, making it difficult to completely shut it off. This is because it was considered to be unsuitable as a watertight valve.

  Actually, the watertight square butterfly valve has not been put into practical use so far. Although there is a practical example of a square butterfly damper, there is no practical example of a square butterfly valve, and the practical use of a watertight square butterfly valve for a granular material has not been considered so far.

In the present invention, a water-tight square butterfly valve is actually arranged at the connection between the air slider and the horizontal transfer means, and powder with high fluidity such as cement, fly ash, tankal, slag, clinker and grain from the hold. When the body is shut off, the granular material has further increased fluidity by the air slider, so that the granular material is less likely to adhere to the long seal part, and even if it adheres, the sealing member is rich in elasticity,
It was found that instantaneous complete interruption was possible.

In addition, since it can have a rectangular cross section from the exit from the hold to the horizontal transfer means, there is less resistance to flow compared to a round butterfly valve, and there is no stagnation of powder in the connecting part. It has also been found that the body can be smoothly extracted and blocked.
Further, according to the tests by the present inventors, it was found that the watertight square butterfly valve can maintain watertightness up to a water pressure of 0.15 MPa (water head pressure: equivalent to 15 m). This means that in a cargo carrier, even if one hold is submerged to a depth of 15 m, the water tightness of the other hold is maintained.

  The air slider 140 is arranged so as to be slightly inclined downward from the bulkhead 2b side of the hull side surface of the hold 2 toward the outlet, so that the granular material in the fluidized holds 2A to 2D Can be transferred to the outlet, and can be transferred to the flow conveyor 120 through the square butterfly valve 130 attached to the outlet. Then, the watertight square butterfly valve 130 is closed by an automatic control device or a manual control device (not shown) to close the space between the air slider 140 and the flow conveyor 120 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 water-tight square butterfly valve 130 even if each hold 2 is communicated with the flow conveyor 120 in the longitudinal direction of the hull. Can be closed watertight. Therefore, even if seawater enters one of the holds 2, the watertight square butterfly valve 130 can be closed to prevent water from entering into the other hold 2, thereby greatly improving 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 square type butterfly valve 130. There is an advantage that the unloading device 100 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 square butterfly valve 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.

  FIG. 5 is a partially enlarged cross-sectional view showing a structure of a granular material carrier ship to which a loading device according to another embodiment of the present invention is applied. As shown in FIG. 5, the lifting device 100 </ b> A is further provided with a watertight square butterfly valve 130 at the connection portion between the bucket elevator 110 and the flow conveyor 120. 100.

  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. Therefore, not only can each hold be partitioned in a water-tight manner, but each hold 2 and the bow 6 can be partitioned in a water-tight state to further improve the stability at the time of damage.

1 Granule carrier 2 Funakura (hold)
2a bottom 2b partition 3 hull bottom plate 4 ballast tank 4a bottom plate 5 air slider mounting bottom plate 6 bow 7 stern 11 valve body 12 disk 13a stem 13b stem 14 cylinder 100 lifting device 110 bucket elevator 120 flow conveyor 130 square butterfly valve 140 Air Slider

Claims (3)

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;
Located in the center of the bottom of the hold so as to penetrate in the longitudinal direction of the hull of the granular material carrier, and connected to the vertical transfer means, the fine particles in the hold are inclined downward in the transfer direction to the bulkhead of the hold. Horizontal transfer means for taking in from the outlet having a rectangular cross section attached and transferring in the horizontal direction toward the lower end side of the vertical transfer means;
It is arranged at the bottom of the hold so as to incline downward toward the center of the bottom, and the powder particles in the hold are fluidized by an air flow and transferred in the hold and transferred toward the outlet. With an air slider,
The outlet having a rectangular cross section of the cargo hold and the horizontal transfer means are connected to each other by a watertight rectangular butterfly valve, and the flow path of the granular material is all rectangular from the outlet to the inlet of the horizontal transfer means. The water-tight square butterfly valve has a cross-section and is inclined downward in the transfer direction, and the water-tight square butterfly valve is inclined and attached along the flow path of the granular material. The granular material fluidized in the air slider is transferred from the outlet of the hold through the water-tight square butterfly valve to the horizontal transfer means without stagnation in the horizontal transfer means, and the water-tight square butterfly valve is closed. In each case, each cargo hold and the horizontal transfer means are shut off in a watertight manner.   The unloading apparatus according to claim 1, wherein the vertical transfer means is a vertical bucket elevator, and the horizontal transfer means is a flow conveyor. 3. The disk surface of the watertight square butterfly valve is inclined with respect to a horizontal plane when the valve is open, and is inclined with respect to a vertical plane when the valve is closed. Lifting equipment.

Images