Maintenance facility, power generation facility, and maintenance method for device

A maintenance facility includes: a first barge; a first connection portion disposed on the first barge and configured to connect the first barge to a second barge mounted with a device including a maintenance target portion; and a building disposed on the first barge and including a wall portion and a roof portion. On the first barge, a temporary placing space in which the maintenance target portion can be placed is disposed between the first connection portion and the building.

TECHNICAL FIELD

This disclosure relates to a maintenance facility, a power generation facility, and a maintenance method for a device.

BACKGROUND ART

A plant in which various devices are installed on a barge is often used as a plant on water.

For instance, Patent Document 1 discloses a compact combined plant in which constitutional devices such as a gas turbine, a steam turbine, and a generator are installed on a barge. In this combined plant, a configuration for reducing a distance between devices is adopted in an exhaust gas discharge section of the gas turbine to reduce the size of the barge, and various devices such as cooler and a condenser are installed not only on a barge deck surface but also on a barge bottom surface to make use of the space.

CITATION LIST

Patent Literature

SUMMARY

Problems to be Solved

Maintenance such as inspection for devices installed on the barge is often desirably performed on the barge. This case is advantageous in that time for transferring the barge is saved, compared to a case where the barge is transferred to a dry dock or the like for maintenance. However, the barge installed with devices usually needs to move along sea or river, which restricts the size of the barge. Thus, it is difficult to ensure enough space on the barge for maintenance of devices to perform maintenance sufficiently on the barge.

In view of the above, an object of at least one embodiment of the present invention is to provide a maintenance facility, a power generation facility, and a maintenance method for a device, whereby it is possible to appropriately perform, on a barge, maintenance of a device installed on the barge.

Solution to the Problems

(1) A maintenance facility according to at least one embodiment of the present invention comprises: a first barge; a first connection portion disposed on the first barge and configured to connect the first barge to a second barge mounted with a device including a maintenance target portion; and a building disposed on the first barge and including a wall portion and a roof portion, wherein, on the first barge, a temporary placing space in which the maintenance target portion can be placed is disposed between the first connection portion and the building.

With the above configuration (1), by connecting the first barge to the second barge mounted with the device including the maintenance target portion and moving the maintenance target portion from the second barge to the first barge, it is possible to appropriately perform maintenance of the maintenance target portion on the first barge.

Further, with the above configuration (1), since the second barge mounted with the device including the maintenance target portion is provided separately from the first barge for maintenance of the maintenance target portion, it is possible to perform appropriate maintenance of the maintenance target portion, without excessively increasing the widths of the barges.

Further, with the above configuration (1), since the temporary placing space is disposed between the first connection portion and the building, it is possible to transfer the maintenance target portion smoothly between the second barge and the building on the first barge. Further, with the above configuration (1), since the building including the wall portion and the roof portion is disposed on the first barge, by performing maintenance of the maintenance target portion inside the building, it is possible to reduce salt damage or the like to the maintenance target portion on sea.

(2) In some embodiments, in the above configuration (1), the maintenance facility further comprises a utility device for maintenance disposed on the first barge.

With the above configuration (2), using the utility device for maintenance, it is possible to appropriately perform maintenance of the maintenance target portion on the first barge.

(3) In some embodiments, in the above configuration (1) or (2), the maintenance facility further comprises a transportation device capable of transporting the maintenance target portion on the first barge.

With the above configuration (3), since the maintenance target portion can be transferred on the first barge with the transportation device, it is possible to perform maintenance of the maintenance target portion smoothly.

(4) According to at least one embodiment of the present invention, a power generation facility comprises: a second barge including a second connection portion configured to be connected to a first barge for maintenance; a power generation device disposed on the second barge; and a crane disposed, on the second barge, between the second connection portion and a maintenance target portion of the power generation device.

With the above configuration (4), since the crane is disposed between the second connection portion and the maintenance target portion of the power generation device, on the second barge mounted with the power generation device, when the second barge is connected to the first barge, the crane is situated in the vicinity of the center of gravity of a floating boy formed by the first barge and the second barge which are connected with each other. Thus, it is possible to move the maintenance target portion stably between the first barge and the second barge.

Further, with the above configuration (4), since the crane is disposed on the second barge mounted with the power generation device, the crane and the device on the second barge oscillate at substantially the same oscillation period. Thus, when the maintenance target portion is lifted or lowered, damage due to contact with a portion in the vicinity of the maintenance target portion hardly occurs.

Accordingly, with the above configuration (4), it is possible to appropriately perform maintenance of the maintenance target portion.

(5) A maintenance method according to at least one embodiment of the present invention comprises: a step of connecting a first barge for maintenance to a second barge on which a device including a maintenance target portion is disposed; a step of moving the maintenance target portion to a temporary placing space of the first barge by a crane disposed on the second barge; and a step of performing maintenance of the maintenance target portion on the first barge.

With the above method (5), by connecting the first barge to the second barge mounted with the device including the maintenance target portion and moving the maintenance target portion from the second barge to the first barge by the crane disposed on the second barge, it is possible to appropriately perform maintenance of the maintenance target portion on the first barge.

Further, with the above method (5), since the second barge mounted with the device including the maintenance target portion is provided separately from the first barge for maintenance of the maintenance target portion, it is possible to perform appropriate maintenance of the maintenance target portion, without excessively increasing the widths of the barges.

(6) In some embodiments, in the above method (5), while the first barge is connected to the second barge, the maintenance target portion is moved to the temporary placing space disposed, on the first barge, between the second barge and a building disposed on the first barge, the building including a wall portion and a roof portion.

With the above method (6), since the temporary placing space is disposed between the first connection portion and the building, it is possible to transfer the maintenance target portion smoothly between the second barge and the building on the first barge. Further, with the above method (6), since the building including the wall portion and the roof portion is disposed on the first barge, by performing maintenance of the maintenance target portion inside the building, it is possible to reduce salt damage or the like to the maintenance target portion on sea.

(7) In some embodiments, in the above method (5) or (6), while the first barge is connected to the second barge, the maintenance target portion is moved to the temporary placing space by the crane disposed, on the second barge, between the maintenance target portion and the first barge.

With the above method (7), since on the second barge mounted with the power generation device, the crane is disposed between the first barge and the maintenance target portion of the device, when the second barge is connected to the first barge, the crane is situated in the vicinity of the center of gravity of a floating boy formed by the first barge and the second barge which are connected with each other. Thus, it is possible to move the maintenance target portion stably between the first barge and the second barge.

Further, with the above method (7), since the crane is disposed on the second barge mounted with the device including the maintenance target portion, the crane and the device on the second barge oscillate at substantially the same oscillation period. Thus, when the maintenance target portion is lifted or lowered, damage due to contact with a portion in the vicinity of the maintenance target portion hardly occurs.

Accordingly, with the above method (7), it is possible to appropriately perform maintenance of the maintenance target portion.

(8) In some embodiments, in any one of the above methods (5) to (7), the step of performing maintenance includes performing the maintenance of the maintenance target portion by using a utility device on the first barge.

With the above method (8), using the utility device for maintenance, it is possible to appropriately perform maintenance of the maintenance target portion on the first barge.

(9) In some embodiments, in any one of the above methods (5) to (8), the method further comprises a step of transporting the maintenance target portion placed in the temporary placing space to a building disposed on the first barge by a transportation device, and the step of performing maintenance includes performing the maintenance of the maintenance target portion inside the building.

With the above method (9), since the maintenance target portion can be transferred on the first barge with the transportation device, it is possible to perform maintenance of the maintenance target portion smoothly.

Advantageous Effects

According to at least one embodiment of the present invention, there is provided a maintenance facility, a power generation facility, and a maintenance method for a device, whereby it is possible to appropriately perform, on a barge, maintenance of a device installed on the barge.

DETAILED DESCRIPTION

First, a maintenance facility according to some embodiments and a power generation facility according to some embodiments will be described.

FIG. 1is a schematic plan view of a maintenance facility according to an embodiment.FIG. 2is a schematic plan view of a power generation facility according to an embodiment.FIG. 3is a diagram of a maintenance facility and a power generation facility which are connected to each other according to an embodiment.FIG. 4is a schematic side view of the maintenance facility and the power generation facility shown inFIG. 3. InFIGS. 3 and 4, the same features as inFIG. 1 or 2are denoted by the same reference signs corresponding to those inFIG. 1 or 2.

The maintenance facility according to some embodiments is a facility for maintenance of a device of a facility (e.g., power generation facility) on water.

As shown inFIG. 1, the maintenance facility1according to an embodiment includes a first barge10, which is a barge for maintenance, configured to float on water such as sea, lake, or river, a first connection portion12disposed on the first barge10, and a building14disposed on the first barge10. On the first barge10, a temporary placing space20is disposed between the first connection portion12and the building14.

The first barge10may be a typical barge not equipped with a power unit such as an engine. In this case, the barge may travel on water by propulsion force imparted from other vessels such as a tugboat or a pusher. Alternatively, the first barge10may be a self-propelled barge equipped with a power unit such as an engine.

The first connection portion12serves to connect the first barge10to a second barge mounted with a device including a maintenance target portion.

The second barge connected with the first barge10may be a barge (second barge40) of a power generation facility2described later. The maintenance target portion may be a component of a power generation device mounted on the power generation facility.

Connection between the first barge10and the second barge via the first connection portion12will be described later.

The building14may be used to temporarily place therein the maintenance target portion moved from the second barge to the first barge10or to undergo maintenance (e.g. inspection or exchange of components) of the maintenance target portion therein.

The building14includes a wall portion16forming an interior space of the building14and a roof portion (not shown) covering the interior space surrounded by the wall portion16. The building14may have a size capable of accommodating at least the maintenance target portion. Alternatively, the building14may have a size capable of accommodating a component of the maintenance target portion after the maintenance target portion is disassembled.

A device for maintenance of the maintenance target portion may be disposed inside the building14. For instance, a crane18capable of lifting the maintenance target portion or a component of the maintenance target portion may be disposed inside the building14.

As shown inFIG. 1, the crane18may be, for instance, an overhead crane disposed on a trolley66movable on a girder64supported by a pair of beams62disposed at an upper portion of the interior space of the building14. The girder64may be movable along the extension direction of the beams62.

The temporary placing space20is a space in which the maintenance target portion moved from the second barge to the first barge10is temporarily placed. The temporary placing space20is disposed between the first connection portion12and the building14.

A utility device for maintenance of the maintenance target portion may be disposed on the first barge10. The utility device may include, for instance, an air compressor22, a generator24, a water tank26, or a pump28.

The utility device may be disposed in a storage building30provided separately from the building14, as shown inFIG. 1. Alternatively, the utility device may be disposed in the building14described above.

A transportation device32capable of transporting the maintenance target portion may be disposed on the first barge10. The transportation device32may be, for instance, a transportation vehicle such as a trailer or a forklift. The transportation device32shown inFIG. 1is a trailer.

The first barge10may be provided with a fender70for preventing contact between the first barge10and the second barge connected to the first barge10. The fender70may be disposed on a side surface on which the first connection portion12is disposed, or may be fastened to a fender fixation tool72disposed on the first barge10via a rope. The fender70may be made of rubber, for instance.

The power generation facility according to some embodiments is a facility for generating electric power on water and is configured to enable maintenance (e.g. inspection or exchange of components) of a power generation device of the power generation facility on the barge for maintenance.

As shown inFIG. 2, the power generation facility2according to an embodiment includes a second barge40configured to float on water such as sea, lake, or river, a power generation device44disposed on the second barge40, and a crane46disposed on the second barge40.

The second barge40may be a typical barge not equipped with a power unit such as an engine. In this case, the barge may travel on water by propulsion force imparted from other vessels such as a tugboat or a pusher. Alternatively, the second barge40may be a self-propelled barge equipped with a power unit such as an engine.

The second barge40is provided with a second connection portion42for connecting a first barge for maintenance (e.g. first barge10of the maintenance facility1described above).

The second connection portion42disposed on the second barge40and the first connection portion12disposed on the first barge10of the maintenance facility1described above are configured to be connected with each other. The connection form between the first connection portion12and the second connection portion42are not limited to a particular form; a general method for connecting barges can be adopted.

In some embodiments, the first connection portion12(seeFIG. 1) of the first barge10includes a mooring rope15for connecting the first barge10and the second barge40, and a winch13for winding the mooring rope15. A first end of the mooring rope15is fixed to the winch13. The second connection portion42(seeFIG. 2) of the second barge40includes a rope fixation tool43for fixing a second end of the mooring rope15to the second barge40. Further, as shown inFIGS. 3 and 4, by connecting the second end of the mooring rope15to the rope fixation tool43, the first barge10and the second barge40are connected.

InFIG. 4, devices and facilities disposed on the first barge10and the second barge40other than the first connection portion12and the second connection portion42are not depicted for clarity.

The power generation device44may be, for instance, a power generation device including a turbine such as a gas turbine or a steam turbine and a generator. In the exemplary embodiments shown inFIG. 2, the power generation device44is a gas turbine power generation device including a gas turbine and a generator.

On the second barge40, an auxiliary48necessary for operating the power generation device44, a control device50for controlling the power generation device44or the auxiliary48, or a device, such as a transformer52, necessary for the power generation facility2to function may be disposed.

The crane46is disposed on the second barge40between the power generation device44and the second connection portion42.

The crane46may be lateral to the turbine (gas turbine or steam turbine) of the power generation device44in the axial direction.

In some embodiments, the maintenance target portion of the power generation device may be a turbine rotor of a gas turbine or a steam turbine.

Next, a method for performing maintenance of the maintenance target portion of the power generation device44of the power generation facility2(seeFIG. 2) using the maintenance facility1(seeFIG. 1) will be described.

In the following, explanation will be given in conjunction with a case where the maintenance target portion is a rotor100(seeFIG. 3) of the gas turbine power generation device. However, the maintenance target portion in the present invention is not limited to the rotor100of the gas turbine.

FIG. 5is a flowchart of a maintenance method according to an embodiment.

The maintenance method according to some embodiments includes, as shown inFIG. 5, a connection step S2, a movement step S4, and a maintenance step S8. In some embodiments, after the movement step S4and before the maintenance step S8, a transportation step S6may be performed.

Each step will now be described in detail.

In the connection step S2, the first barge10(seeFIG. 1) of the maintenance facility1is connected to the second barge40(seeFIG. 2) of the power generation facility2provided with the gas turbine power generation device (power generation device44) including the rotor100which is the maintenance target portion.

In some embodiments, as shown inFIGS. 3 and 4, the first barge10and the second barge40may be connected via the first connection portion12of the first barge10and the second connection portion42of the second barge40.

For instance, the first barge10may be connected to the second barge40by connecting the second end of the mooring rope15(first connection portion12), which has the first end fixed to the winch13(first connection portion12) on the first barge10, to the rope fixation tool43(second connection portion42) on the second barge40.

In an embodiment, after the second end of the mooring rope15is connected to the rope fixation tool43on the second barge40, the mooring rope15may be wound by the winch13(i.e., tension may be imparted to the mooring rope15) with the fender70being interposed between the first barge10and the second barge40. Thereby, it is possible to connect the first barge10and the second barge40stably while connection between the first barge10and the second barge40is prevented.

In the movement step S4, the crane46disposed on the second barge40moves the rotor100, which is the maintenance target portion, to the temporary placing space20of the first barge10.

In the movement step S4according to an embodiment, after a casing accommodating the rotor100of the power generation device (gas turbine power generation device)44is detached, the rotor100is lifted by the crane46. Then, as shown inFIG. 3, while the second barge40is connected with the first barge10, the crane46is rotated so that the lifted rotor100is moved to a position above the temporary placing space20of the first barge10. In this position, the crane46lowers the rotor100and places the rotor100in the temporary placing space20.

InFIG. 3, a state where the crane46is rotated to move the rotor100is shown by the long-dashed double-dotted line; and the rotor100placed in the temporary placing space20of the first barge10is shown by the solid line. Further,FIG. 3show a state where the casing is not detached from the power generation device44for clarity of the figure.

In the transportation step S6, the rotor100, which is the maintenance target portion, disposed in the temporary placing space20is transported to the building14disposed on the first barge10by the transportation device32.

In an embodiment, before the rotor100as the maintenance target portion is moved by the crane46in the movement step S4, a bed section of the transportation device32may be disposed in the temporary placing space20in advance, and at a time when the rotor100is placed in the temporary placing space20, the rotor100may be placed on the bed section of the transportation device32disposed in the temporary placing space20. Then, the transportation device32may be moved from the temporary placing space20to the building14to transport the rotor100to the building14.

The transportation step S6is an optional step performed as needed. In some embodiments, the transportation step S6may be not performed.

In the maintenance step S8, maintenance operation (e.g. inspection or exchange of components) of the rotor100which is the maintenance target portion is performed on the first barge10.

The maintenance step S8may be performed inside the building14on the first barge10.

Further, in the maintenance step S8, maintenance of the rotor100may be performed by using the utility device (e.g. air compressor22, generator24, water tank26, or pump28described above) on the first barge.

According to the maintenance facility1and the power generation facility2, or the maintenance method described above, the first barge10is connected to the second barge40mounted with the power generation device44including the rotor100which is the maintenance target portion, and the rotor100is moved from the second barge40to the first barge10by the crane46disposed on the second barge40. Thereby, it is possible to appropriately perform maintenance of the rotor100on the first barge10.

Further, since the second barge40mounted with the power generation device44including the rotor100as the maintenance target portion is provided separately from the first barge10for maintenance of the rotor100, it is possible to perform appropriate maintenance of the rotor100of the maintenance target portion, without excessively increasing the widths of the barges (first barge10and second barge40).

Further, since the temporary placing space20is disposed between the first barge10and the building14, it is possible to transfer the rotor100as the maintenance target portion smoothly between the second barge40and the building14on the first barge10. Further, since the building14including the wall portion16and the roof portion is disposed on the first barge10, by performing maintenance of the rotor100as the maintenance target portion inside the building14, it is possible to reduce salt damage or the like to the rotor100on sea.

Further, since the crane46is disposed between the first barge10and the rotor100, which is the maintenance target portion of the power generation device44, on the second barge40mounted with the power generation device44, when the second barge40is connected to the first barge10, the crane46is situated in the vicinity of the center of gravity of a floating boy formed by the first barge10and the second barge40which are connected with each other. Thus, it is possible to move the rotor100as the maintenance target portion stably between the first barge10and the second barge40.

Further, since the crane46is disposed on the second barge40mounted with the power generation device44including the rotor100as the maintenance target portion, the crane46and the power generation device44on the second barge40oscillate at substantially the same oscillation period. Thus, when the rotor100as the maintenance target portion is lifted or lowered, damage due to contact with a portion (e.g., casing) in the vicinity of the rotor100hardly occurs.

Further, use of the utility device on the first barge10enables appropriate maintenance of the rotor100as the maintenance target portion.

Moreover, by transferring the rotor100as the maintenance target portion on the first barge10with the transportation device32, it is possible to perform maintenance of the maintenance target portion smoothly.

Embodiments of the present invention were described in detail above, but the present invention is not limited thereto, and various amendments and modifications may be implemented.

On the other hand, an expression such as “comprise”, “include” and “have” are not intended to be exclusive of other components.

REFERENCE SIGNS LIST