Abstract:
A hanging device of a component of a turbine includes: a bridge member that bridges upper ends of a pair of side wall plates facing each other with the turbine interposed therebetween, among plates which constitute an enclosure surrounding an outer periphery of the turbine, and has a traveling path; and a hanging tool that hangs the component of the turbine and travels along the traveling path.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a method for mounting or dismounting a component of a turbine covered with an enclosure, a device for executing the method, and a method for installing the device. 
         [0002]    Priority is claimed on Japanese Patent Application No. 2014-131542, filed Jun. 26, 2014, the content of which is incorporated herein by reference. 
       BACKGROUND ART 
       [0003]    A gas turbine generally includes a compressor that compresses air, a combustor that generates combustion gas by combusting fuel in the air compressed in the compressor, and a turbine that is driven by the combustion gas. An intake duct is connected to the compressor. The gas turbine is disposed in a turbine building. The gas turbine is covered with an enclosure in the turbine building. 
         [0004]    The following Patent Literature 1 discloses a method for disassembling apart of an intake duct, using an overhead crane mounted in the turbine building, and inspecting a bearing of a gas turbine located vertically below the intake duct. 
       CITATION LIST 
     Patent Literature 
       [0005]    [Patent Literature 1] 
         [0006]    Japanese Unexamined Patent Application, First Publication No. 2001-107745 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0007]    In the technique described in Patent Literature 1, since an overhead crane is used in the course of mounting and dismounting the components of the gas turbine, in particular, when moving the components, an occupancy time of the overhead crane increases in the repair and inspection processes, including the mounting and dismounting process of the components. Moreover, in the technique described in Patent Literature 1, for example, it is not possible to perform the repair and inspection of the exhaust-side components of the gas turbine together with the repair and inspection of the intake-side components of the gas turbine. Therefore, in the technique described in Patent Literature 1, there is a problem of an increase in time required for repair and inspection processes of the gas turbine. 
         [0008]    Accordingly, an object of the present invention is to provide a technique that is capable of shortening the time required for repair and inspection processes of the turbine. 
       Solution to Problem 
       [0009]    A hanging device of a component as an aspect according to the present invention for solving the aforementioned problems includes: a bridge member that bridges upper ends of a pair of side wall plates facing each other with a turbine interposed, therebetween, among plates which constitute an enclosure surrounding an outer periphery of the turbine, and has a traveling path; and a hanging tool that hangs the component of the turbine and travels along the traveling path. 
         [0010]    It is possible to move the turbine component by the use of the hanging device, even without using the overhead crane. Therefore, by using the hanging device, it is possible to considerably shorten the occupancy time of the overhead crane in the course of repair and inspection of the component, and furthermore, for example, by the combined use of the hanging device and the overhead crane, it is possible to perform repair and inspection of the exhaust-side component of the turbine in parallel with repair and inspection of the intake-side component of the turbine. 
         [0011]    Here, the hanging device of the component may include a leg member that is disposal on each of the upper ends of the pair of side wall plates, supports the bridge member, and adjusts the height of the bridge member. 
         [0012]    In the hanging device, the height of the bridge member can be set to a desired height. Thus, the height of the traveling path of the bridge member, and the height of the hanging tool, mounted on the traveling path can be set to the desired height. 
         [0013]    In the hanging device of the component including the leg member, the leg member may have a flange portion that regulates the movement in a lateral direction in which the pair of side wall plates are arranged. 
         [0014]    In the hanging device, even if a lateral load is applied to the leg member or the bridge member supported by the leg member, it is possible to prevent the leg member from deviating in the lateral direction from the upper end of the side wall plate. 
         [0015]    The hanging device of the component including the leg member may include a pedestal which is disposed between the leg member and the upper end of the side wall plate, and of which a central portion in the lateral direction in which the pair of side wall plates are arranged gently protrudes upward. 
         [0016]    In the hanging device, even if the leg member is slightly tilted, it is possible to reduce a stress concentration on the leg member or the corner of the upper end of the side wall plate. 
         [0017]    In any one of the above hanging devices of the component, the traveling path may have a lateral path that extends in the lateral direction in which the pair of side wall plates are arranged. 
         [0018]    In the hanging device, it is possible to move the component that is hung by the hanging tool in the lateral direction. 
         [0019]    In any one of the above hanging devices of the component, the traveling path may have an axial path that extends in the axial direction which is a direction in which a rotational axis of the turbine extends. 
         [0020]    In the hanging device, it is possible to move the component that is hung by hanging tool in the axial direction. 
         [0021]    Further, in any one of the above hanging devices of the component, the traveling path may have a lateral path extending in the lateral direction in which the pair of side wall plates are arranged, an axial path extending in the axial direction which is a direction in which the rotational axis of the turbine extends, and a connecting path that connects the lateral path and the axial path such that the hanging tool is movable between the lateral path and the axial path. 
         [0022]    In the hanging device, it is possible to move the component that is hung by the hanging tool in the lateral direction and the axial direction. 
         [0023]    In the hanging device of the component having the connecting path, the lateral path, the axial path, and the connecting path may be provided on the same virtual plane, and the hanging device may include a connecting path rotation support portion that supports the connecting path so as to be rotatable on an axis perpendicular to the virtual, plane around an intersection point between an extension line of the lateral path and an extension line of the axial path. 
         [0024]    In any one of the above hanging devices of the component, the bridge member may have a lateral beam member which extends in the lateral direction in which the pair of side wall plates are arranged and bridges the upper ends of the pair of side wall plates, and to which the traveling path is mounted. 
         [0025]    In the hanging device of the component having the axial path, the bridge member may have a lateral beam member that extends in the lateral direction in which the pair of side wall plates are arranged and bridges the upper ends of the pair of side wall plates, and an axial beam member which is mounted on the lateral beam member and extends in the axial direction, and to which the axial path is mounted. 
         [0026]    The hanging device of the component having the axial beam member may further include an axial beam support seat that is fixed to the inner surface of the intake duel of the turbine to support an end of the axial beam member. 
         [0027]    In the hanging device, when the hanging tool is axially moved inside the intake duct along the axial path, it is possible to stably support the bridge member by supporting an end of the axial beam member, on which the axial path is mounted, with the axial beam support seat. 
         [0028]    According to another aspect of the invention for solving the aforementioned problems, there is provided a method for installing the hanging device of the component including the axial beam member, the method including: an enclosure disassembling process of exposing the upper ends of the pair of side wall plates by dismounting at least a part of an upper enclosure of the enclosure covering an upper portion of the turbine; an opening process of forming an opening in a part of a rear plate of a front plate and the rear plate of the intake duct facing each other in the axial direction by dismounting a part of the near plate above the rotational axis; a seat arranging process of fixing the axial beam support seat to an inner surface which is a surface of the front plate on the rear plate side; an inserting process of partially inserting the axial beam member and the axial path into the intake duct from the opening; an end supporting process of placing the end of the axial beam member inserted into the intake duct on the axial beam support seat; and a lateral beam member arranging process of arranging the lateral beam member to bridge the upper ends of the pair of side wall plates. 
         [0029]    According to still another aspect of the invention for solving the aforementioned problems, there is provided a method for mounting or dismounting a component of a turbine covered with an enclosure, the method including: an enclosure disassembling process of exposing upper ends of a pair of side wall plates facing each other with the turbine interposed therebetween by dismounting at least a part of an upper enclosure of the enclosure covering an upper portion of the turbine; a bridge member arranging process of arranging a bridge member having a traveling path to bridge the upper ends of the pair of the side wall plates; and a component moving process of hanging the component to a hanging tool capable of traveling along the traveling path, moving the hanging tool along the traveling path, and moving the component that is hung by the hanging tool. 
         [0030]    In the method for mounting or dismounting the component, the bridge member arranging process may include a height adjusting process of adjusting the height of the bridge member by placing a leg member configured to support the bridge member on each of the upper ends of the pair of side wall plates. 
         [0031]    In any one of the above methods for mounting or dismounting the component, the traveling path may have a lateral path that extends in the lateral direction in which the pair of side wall plates are arranged, and the hanging tool may be moved along the lateral path in the component moving process. 
         [0032]    In any one of the above methods for mounting or dismounting the component, the traveling path may have an axial path that extends in the axial direction which is a direction in which the rotational axis of the turbine extends, and the hanging tool may be moved along the axial path in the component moving process. 
         [0033]    In any one of the above methods for mounting or dismounting the component, the traveling path may have a lateral path extending in the lateral direction in which the pair of side wall plates are arranged, an axial path extending in the axial direction which is a direction in which the rotational axis of the turbine extends, and a connecting path that connects the lateral path and the axial path such that the hanging tool is movable between the lateral path and the axial path, and the hanging tool may be moved along the lateral path, the connecting path, and the axial path in the component moving process. 
         [0034]    In the method for mounting or dismounting the component in which the hanging tool is moved along the lateral path, the connecting path, and the axial path in the component moving process, the bridge member may have a lateral beam member that extends in the lateral direction and bridges the upper ends of the pair of side wall plates, and an axial beam member which is fixed to the lateral beam member and extends in the axial direction, and to which the axial path is mounted. Plates which form the intake duct of the turbine may include a front plate and a rear plate facing each other in the axial direction. The bridge member arranging process may include: an opening process of forming an opening in a part of the rear plate by dismounting a part of the rear plate above the rotational axis; an inserting process of partially inserting the axial path and the axial beam member into the intake duct tram the opening; an end supporting process of supporting the end of the axial beam member inserted into the intake duct on the front plate; and a lateral beam member arranging process of arranging the lateral beam member to bridge the upper ends of the pair of side wall plates. 
         [0035]    Further, in the method for mounting or dismounting the component including the end supporting process, the bridge member arranging process may include a seat arranging process of fixing the axial beam support seat on the inner surface of the intake duct that is the surface of the front plate on the rear plate side, and the end of the axial beam member inserted into the intake duct may be placed on the axial beam support seat in the end supporting process. 
       Advantageous Effects of Invention 
       [0036]    In an aspect according to the present invention, it is possible to shorten the time required for the repair and inspection processes of the turbine. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0037]      FIG. 1  is a cutaway side view of main parts of a plant in an embodiment according to the present invention. 
           [0038]      FIG. 2  is a cutaway side view of main parts of a gas turbine in the embodiment according to the present invention. 
           [0039]      FIG. 3  is a cutaway side view of main parts of an intake duct in the embodiment according to the present invention. 
           [0040]      FIG. 4  is a perspective view of the intake duct in the embodiment according to the present invention. 
           [0041]      FIG. 5  is a perspective view of a hanging device in the embodiment according to the present invention. 
           [0042]      FIG. 6  is a view taken from an arrow VI in  FIG. 5 . 
           [0043]      FIG. 7  is a view taken from an arrow VII in  FIG. 5 . 
           [0044]      FIG. 8  is a front view of a leg member in fee embodiment according to the present invention. 
           [0045]      FIG. 9  is a side view of a hanging tool in the embodiment according to the present invention. 
           [0046]      FIG. 10  is an explanatory view representing a state of a plant before dismounting of a component in the embodiment according to the present invention. 
           [0047]      FIG. 11  is an explanatory view representing a state of the plant after an enclosure disassembling process, an opening process, and a seat arranging process in the embodiment according to the present invention. 
           [0048]      FIG. 12  is an explanatory view (part 1) representing a state of the plant in an inserting process in the embodiment according to the present invention. 
           [0049]      FIG. 13  is an explanatory view (part 2) representing a state of the plant in the inserting process in the embodiment according to the present invention. 
           [0050]      FIG. 14  is an explanatory view (part 3) representing a state of the plant in the inserting process in the embodiment according to the present invention. 
           [0051]      FIG. 15  is an explanatory view (part 4) representing a state of the plant in the inserting process in the embodiment according to the present invention. 
           [0052]      FIG. 16  is an explanatory view representing a state of the plant after an end supporting process and a lateral beam member arranging process in the embodiment according to the present invention. 
           [0053]      FIG. 17  is an explanatory view (part 1) representing a state of the plant in a component moving process in the embodiment according to the present invention. 
           [0054]      FIG. 18  is an explanatory view (part 2) representing a state of the plant in the component moving process in the embodiment according to the present invention. 
           [0055]      FIG. 19  is a flowchart representing the execution procedure of the method for dismounting the component of the gas turbine in the embodiment according to the present invention. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0056]    Hereinafter, an embodiment of a method for mounting or dismounting a component of a turbine, a device for executing the method, and a method for installing the device according to the present invention will be described in detail with reference to the accompanying drawings. 
       Embodiment 
       [0057]    First, an embodiment of a plant to which the method for mounting or dismounting the component of the turbine according to the present invention is applied will be described. 
         [0058]    As illustrated in  FIG. 1 , a plant of the present embodiment is equipped with a gas turbine  10 , a generator  55  that generates electric power by being driven by the gas turbine  10 , an intake duct  30  that guides air to the gas turbine  10 , an intake filter device  49  that cleans the air flowing into the intake duct  30 , an exhaust duct  50  through which the exhaust gas from the gas turbine  10  flows, an enclosure  60  that covers the gas turbine  10 , a turbine building  70  that houses the gas turbine  10  and the generator  55 , and an overhead crane  75  that is provided in the turbine building  70 . 
         [0059]    As illustrated in  FIG. 2 , the gas turbine  10  is equipped with a compressor  11  that compresses air from the intake duct  30 , a combustor  21  that combusts the fuel in the air compressed by the compressor  11  to generate combustion gas, a turbine  25  that is driven by the combustion gas from the combustor  21 , and an exhaust casing  28  that guides the exhaust gas from the turbine  25  to the exhaust duct  50 . 
         [0060]    The compressor  11  has a compressor rotor  12  which rotates about a rotational axis Ar, and a compressor casing  13  which rotatably covers the compressor rotor  12 . Hereinafter, a direction in which the rotational axis Ar extends will be referred to as an axial direction Da. The turbine  25  has a turbine rotor  26  that rotates about the rotational axis Ar, and a turbine casing  27  that rotatably covers the turbine rotor  26 . The compressor rotor  12  and the turbine rotor  26  are located on the same rotational axis Ar, and are connected to each other to form a gas turbine rotor  16 . A generator rotor of the generator  55  is connected to the gas turbine rotor  16 . 
         [0061]    The compressor casing  13 , the turbine casing  27  and the exhaust casing  28  are aligned in the axial direction Da in this order, and are connected to each other to form a gas turbine casing  17 . Hereinafter, a side of the compressor casing  13  relative to the turbine casing  27  in the axial direction Da will be referred to as an upstream side or a front side, and a side of the turbine casing  27  relative to the compressor casing  13  in the axial direction Da will be referred to as a downstream side or a rear side. In addition, a horizontal direction perpendicular to the axial direction Da will be referred to as a lateral direction Dh. Furthermore, a direction perpendicular to the axial direction Da and the lateral direction Dh will be referred to as a vertical direction Dv. 
         [0062]    The intake duct  30  is disposed in front of the compressor casing  13 , and the exhaust duct  50  is disposed behind the exhaust casing  28 . 
         [0063]    The gas turbine  10  is further equipped with a front bearing  18   a  that rotatably supports the front side of the gas turbine rotor  16 , and a rear bearing  18   b  that rotatably supports the rear side of the gas turbine rotor  16 . 
         [0064]    As illustrated in  FIG. 1 , the intake duct  30  has a compressor connecting portion  31 , a duct vertical portion  45 , a duct bent portion  46 , and a duct horizontal portion  47 . The compressor connecting portion  31  is connected to the compressor casing  13 . The duct vertical portion  45  extends vertically upward from the compressor connecting portion  31 . The duct bent portion  46  is connected to the upper end of the duct vertical portion  45 . The duct horizontal portion  47  extends in the axial direction Da, with a rear side thereof in the axial direction Da connected to the duct bent portion  46  and a front side thereof in the axial direction Da connected to the intake filter device  49 . 
         [0065]    The overhead crane  75  has a pair of traveling rails  76  that face each other in an extending axial direction Da of the lateral direction Dh, a girder  77  which extends in the axial direction Da and of which both ends are supported on the traveling rails  76 , and a hoist  78  mounted on the girder  77 . The pair of traveling rails  76  are disposed at a position that is higher than the gas turbine  10  and the enclosure  60  and is lower than a roof  71  of the turbine building  70 . Of the pair of traveling rails  76 , one traveling rail  76  is disposed on the front side of the gas turbine  10  in the axial direction Da, and the other traveling rail  76  is disposed on the rear side of the gas turbine  10  in the axial direction Da. The girder  77  travels on the pair of traveling rails  76  in the lateral direction Dh, in a state in which both ends thereof in the axial direction Da are supported by the pair of traveling rails  76 . The hoist  78  is mounted on the girder  77  so as to be movable in the axial direction Da. 
         [0066]    The enclosure  60  has an upper enclosure  65  that covers the upper side of the gas turbine  10 , and a lower enclosure  61  that covers the side periphery of the gas turbine  10 . The lower enclosure  61  has a front wall plate  62  and a rear wall plate  63  that face each other in the axial direction Da, and a pair of side wall plates  64  corresponding to each other in the lateral direction Dh. The gas turbine  10  is disposed between the front wall plate  62  and the rear wall plate  63  in the axial direction Da. An opening through which a connecting shaft  56  that mechanically connects the rotor of the generator  55  and the gas turbine rotor  16  is inserted is formed in the front wall plate  62 . An opening through which the exhaust duct  50  is inserted is formed in the rear wall plate  63 . The gas turbine  10  is disposed between the pair of side wall plates  64  in the lateral direction Dh. The upper enclosure  65  has a front wall plate  66  provided on the front wall plate  62  of the lower enclosure  61 , a rear wall plate  67  provided on the rear wall plate  63  of the lower enclosure  61 , a pair of side wall plates  68  provided on the pair of side wall plates  64  of the lower enclosure  61 , and a top plate  69 . The top plate  69  of the upper enclosure  65  closes the opening of the upper enclosure  65  that is formed by the upper edge of the front wall plate  66  of the upper enclosure  65 , the upper edge of the rear wall plate  67  of the upper enclosure  65 , and the upper edges of the pair of side wall plates  68  of the upper enclosure  65 . An opening through which the intake duct  30  is inserted is formed in the top plate  69 . 
         [0067]    As illustrated in  FIG. 3 , the compressor casing  13  has an outer casing  14  and an inner casing  15  that each form a cylindrical shape around the rotational axis Ar. The inner casing  15  covers the outer periphery of the front side in the axial direction Da of the compressor rotor  12 . The outer casing  14  covers substantially the entire outer periphery of the compressor rotor  12 . Between the radially inner side of the cylindrical outer casing  14  and the radially outer side of the cylindrical inner casing  15 , an annular air flow path about the rotational axis Ar is formed. 
         [0068]    As illustrated in  FIGS. 3 and 4 , the compressor connecting portion  31  of the intake duct  30  has a connection cylinder  32  that forms a cylindrical shape around the rotational axis Ar and is mounted on a front end  15   a  of the inner casing  15 , a front plate  33  and a rear plate  34  that spread in a direction perpendicular to the rotational axis Ar and face each other at an interval in the axial direction Da, and a side plate  39  that connects the radially outer edge of the front plate  33  and the radially outer edge of the rear plate  34 . 
         [0069]    The rear plate  34  is fixed to a front outer peripheral edge  14   a  of the outer casing  14 . The front plate  33  is fixed to a front end  32   a  of the connection cylinder  32 . As described above, the side plate  39  is located between the radially outer edge of the front plate  33  and the radially outer edge of the rear plate  34  to connect fee front and rear plates to each other. However, the side plate  39  does not connect the upper edge which is a part of the radially outer edge of the front plate  33  with the tipper edge which is a part of the radially outer edge of the rear plate  34 . In other words, the upper edge of the front plate  33  and the upper edge of the rear plate  34  are not connected to each other by the side plate  39 . Therefore, the opening of the compressor connecting portion  31  is formed by the upper edge of the side plate  39 , the upper edge of the front plate  33 , and the upper edge of the rear plate  34 . The rear plate  34  has a rear plate body  35  in which an opening (hereinafter referred to as a rear plate opening  36 ) penetrating in the axial direction Da is formed, and a lid  37  that closes the rear plate opening  36 . The rear plate opening  36  is formed below the upper edge of the rear plate body  35  and above the rotational axis Ar of the gas turbine  10 . The front bearing  18   a  of the gas turbine  10  is disposed on the inner peripheral side of the connection cylinder  32 . 
         [0070]    The duct vertical portion  45  is connected to the upper edge of the compressor connecting portion  31  via an expansion  48 . The expansion  48  is provided to suppress vibration or the like of the compressor connecting portion  31  from being transmitted to the duct vertical portion  45 . 
         [0071]    Next, the hanging device for executing the method for mounting or dismounting the component of the gas turbine  10  will be described. 
         [0072]    As illustrated in  FIGS. 5 to 7 , the hanging device  100  is equipped with a bridge member  110  having a traveling path  120 , a hanging tool  130  that travels along the traveling path  120  with the component of the gas turbine  10  hung thereon, a leg member  140  that supports the bridge member  110 , a pedestal  150  disposed between the leg member  140  and the side wall plate  64  of the lower enclosure  61 , and an axial beam support seat  160  that supports an end of the bridge member  110 . 
         [0073]    The bridge member  110  has a lateral beam member  111  that extends in the lateral direction Dh and bridges the upper ends of the pair of side wall plates  64 , an axial beam member  115  extending in the axial direction Da, a lateral path  121  that extends in the lateral direction Dh and is mounted on the lateral beam member  111 , an axial path  125  that extends in the axial direction Da and is mounted on the axial beam member  115 , a connecting path  129  that connects the lateral path  121  and the axial path  125  such that the hanging tool  130  is movable between the lateral path  121  and the axial path  125 , and a connecting path rotation support portion  119  that rotatably supports the connecting path  129 . Further, the traveling path  120  has the lateral path  121 , the connecting path  129 , and the axial path  125 . 
         [0074]    The lateral beast member  111 , for example, is formed of rectangular steel. The length in the lateral direction Dh of the lateral beam member  111  is slightly longer than the interval between the pair of side wall plates  64 . The axial beam member  115  has a first axial beam member  116 , a second axial beam member  117 , and a third axial beam member  118 . The first axial beam, member  116 , a second axial beam member  117 , and the third axial beam member  118 , for example, are formed of rectangular steel. The first axial beam member  116 , the second axial beam member  117  and the third axial beam member  118  extend in the axial direction Da, are aligned from the rear side to the front side on a straight line in that order, and are joined together. The first axial beam member  116  is joined to the intermediate portion in the lateral direction Dh of the lateral beam member  111  such that its lower surface is flush with the lower surface of the lateral beam member  111 . The second axial beam member  117  is joined to the lower surface of the front end side of the first axial beam member  116 . The third axial beam member  118  is joined to the upper surface of the front end side of the second axial beam member  117 . Therefore, the first axial beam member  116 , the second axial beam member  117 , and the third axial beam member  118  are aligned on the straight line in the axial direction Da when viewed from the vertical direction, but when viewed Mm the lateral direction Dh, the intermediate second axial beam member  117  is shifted to the lower side with respect to the first axial beam member  116  and the third axial beam member  118 . 
         [0075]    The lateral path  121  is hung down from the lateral beam member  111  by a tension suspension  109  or the like, on the lower side of the lateral beam member  111 . The lateral path  121  is disposed below the lateral beam member  111  along substantially the entire lateral beam member  111  in the lateral direction Dh, but is not disposed in the central portion in the lateral direction Dh or at either end in the lateral direction Dh of the lateral beam member  111 . 
         [0076]    The axial path  125  is hung down from the second axial beam member  117  and the third axial beam member  118  by the tension suspension  109  or the like so as to be located on the same virtual plane as the lateral path  121 , on the lower side of the second axial beam member  117  and the third axial beam member  118 . 
         [0077]    The connecting path  129  is located on the same virtual plane as the lateral path  121  and the axial path  125 , and is supported by the connecting path rotation support portion  119  so as to be rotatable on the axis perpendicular to the virtual plane around an intersection point between the extension line of the lateral path  121  and the extension line of the axial path  125 . The connecting path rotation support portion  119  is mounted on the central portion of the lateral beam member  111  in which the lateral path  121  is not provided in the lateral beam member  111 , and on the first axial beam member  116  in which the axial path  125  is not provided in the axial beam member  115 . 
         [0078]    The leg member  140  is a member for setting an installation height of the traveling path  120  to a desired height. As illustrated in  FIG. 8 , the leg member  140  has a leg  141  extending in the vertical direction Dv, and a leg seat  142  joined to the lower end of the leg  141 . The leg seat  142  is formed of channel steel. Therefore, the leg seat  142  has a pair of flanges (flange portions)  143  that are parallel to each other and face each other, and a web portion  144  that connects the pair of flanges  143 . The leg seat  142  is disposed so that the pair of flanges  143  face each other in the lateral direction Dh and the web portion  144  is disposed on the upper side of the pair of flanges  143 . The dimension of the interval between the pair of flanges  143  is greater than a dimension in the lateral direction Dh of the side wall plate  64 , i.e., a thickness dimension t of the side wall plate  64 . Therefore, when the leg seat  142  is disposed on the side wall plate  64 , the side wall plate  64  is interposed between the pair of flanges  143  of the leg seat  142 . The leg  141  is joined to the upper surface of the web portion  144 . The end in the lateral direction Dh of the lateral beam member  111  is joined to the upper end of the leg  141 . 
         [0079]    As illustrated in  FIG. 8 , the pedestal  150  disposed between the leg member  140  and the side wall plate  64  of the lower enclosure  61  forms a substantially rectangular parallelepiped shape, and has a pair of side surfaces  151  facing each other in the lateral direction Dh, a pair of end surfaces facing each other in the axial direction Da, a lower surface  153 , and an upper surface  154 . However, the upper surface  154  is a circumferential surface that protrudes upward rather than a flat surface. Therefore, a central portion in the lateral direction Dh of the pedestal  150  gently protrudes upward. Further, the boundary between the upper surface  154  and each side surface  151  is chamfered, and has a smooth curved surface. 
         [0080]    As illustrated in  FIG. 9 , the hanging tool  130  has a trolley  131  that moves along the traveling path  120 , and a chain block  135  mounted on the trolley  131 . The trolley  131  has a plurality of rollers  132 , and a frame  133  that rotatably supports the rollers  132 . The traveling path  120  is formed of a steel material of which a cross-section perpendicular to its longitudinal direction has a shape like that of lip channel steel. When the traveling path  120 , for example, is formed of the lip channel steel, the opening of the lip channel steel and a lip  126  are directed downward. The rollers  132  of the trolley  131 , for example, roll on the upper surface of the lip  126 . 
         [0081]    As illustrated in  FIG. 9 , the axial, beam support seat  160  supports the front end of the third axial beam member  118 . The axial beam support seat  160  has a receiving plate  161  that receives the front end of the third axial beam member  118 , and a fixing plate  162  to be fixed to a reinforcing plate  164  that is welded to the inner surface of the intake duct  30  in advance. 
         [0082]    Next, a method for dismounting the component of the gas turbine  10  will be described in accordance with the flowchart illustrated in  FIG. 19 . 
         [0083]    First, as illustrated in  FIGS. 10 and 11 , the upper enclosure  65  is dismounted from the lower enclosure  61  using the overhead crane  75  or the like (S 1 : an enclosure disassembling process). 
         [0084]    Next, the bridge member  110  of the hanging device  100  is disposed on the upper enclosure  65  (S 2 : a bridge member arranging process). In the bridge member arranging process (S 2 ) an opening process (S 3 ), a seat arranging process (S 4 ), an inserting process (S 5 ), an end supporting process (S 6 ), and a lateral beam member arranging process (S 7 ) are executed. 
         [0085]    In the bridge member arranging process (S 2 ), first, as illustrated in  FIG. 11 , the lid  37  is detached from the rear plate body  35  of the intake duct  30 , and the rear plate opening  36  (see  FIG. 4 ) is opened (S 3 : the opening process). Next, the fixing plate  162  of the axial beam support seat  160  is fixed to the reinforcing plate  164  (see  FIG. 9 ) that is previously welded to the inner surface of the intake duct  30  that is the surface of the front plate  33  using screws or the like. Furthermore, the pedestal  150  is disposed on each of the upper end surfaces of the pair of side wall plates  64  of the upper enclosure  65  (S 4 : the seat arranging process). 
         [0086]    As illustrated in  FIG. 9 , when the fixing plate  162  is fixed to the reinforcing plate  164  previously welded to the front plate  33  by screws  165 , it is necessary to form screw holes in the reinforcing plate  164 . However, such screw holes become resistance to the air flow at the time of operation of the gas turbine  10 , which is not preferable. Therefore, screw holes  166  (see  FIG. 9 ) are formed in the reinforcing plate  164 , and blind screws are screwed into the screw holes  166  at the time of operation of the gas turbine  10 . 
         [0087]    Next, as illustrated in  FIGS. 12 to 15 , the hanging device  100  is hung up by the overhead crane  75  using a wire or the like, and the axial beam member  115  and the axial path  125  of the hanging device  100  are inserted into the intake duct  30  from the rear plate opening  36  of the intake duct  30  (S 5 : the inserting process). 
         [0088]    In the inserting process (S 5 ), first, as illustrated in  FIG. 12 , wires  81   a  and  81   b  are hooked at a plurality of positions of the hanging device  100 , and the wires  81   a  and  81   b  are hooked to a hook  79  of the crane  75 . Subsequently, by manipulating the hoist  78 , the wire of the hoist  78  with the hook  79  mounted oil the lower end is wound up, and the hanging device  100  is hung up. At this time, the axial beam member  115  of the hanging device  100  is substantially parallel to the rotational axis Ar of the gas turbine  10 , and the third axial beam member  118  is located on the front side of the first axial beam member  116 . Next, by moving the girder  77  of the overhead crane  75  along the traveling rails  76  (see  FIG. 1 ), and if necessary, by moving the hoist  78  along the girder  77 , the hanging device  100  is disposed such that the axial beam member  115  and the axial path  125  are located above the rotational axis Ar of the gas turbine  10 , on the rear side of the intake duct  30  of the gas turbine  10 . 
         [0089]    In the inserting process (S 5 ), next, as illustrated in  FIG. 13 , by tilting the hanging device  100  so that the front end of the hanging device  100  is located below the rear end thereof, the upper edges of the second axial beam member  117  and the third axial beam member  118  are located below the upper edge of the rear plate opening  36 . At this time, of the plurality of wires  81   a  and  81   b  hooked to the hanging device  100 , the wire  81   a  hooked to the front side of the hanging device  100  is extended, and the wire  81   b  hooked to the rear side of the hanging device  100  is shortened. 
         [0090]    In the inserting process (S 5 ), next, as illustrated in  FIG 14 , the hoist  78  of the overhead crane  75  is moved to the front side in the axial direction Da along the girder  77 , and the second axial beam member  117  and the third axial beam member  118  of the tilted hanging device  100 , and a part of the axial path  125  are inserted into the intake duct  30  from the rear plate opening  36 . Then, as illustrated in  FIG. 15 , the hanging device  100  is returned to an untilted state so that the axial path  125  becomes horizontal. Thus, the inserting process (S 5 ) is completed. 
         [0091]    When the inserting process (S 5 ) is completed, as illustrated in  FIGS. 15 and 16 , the hoist  78  of the overhead crane  75  is further moved to the front side in the axial direction Da along the girder  77 , and the front end of the third axial beam member  118  of the hanging device  100  is placed on the receiving plate  161  of the axial beam support seat  160  (see  FIG. 9 ) (S 6 : the end supporting process). Subsequently, as illustrated in  FIGS. 5 and 16 , the ends of the lateral beam member  111  of the hanging device  100  are placed on the side wall plates  64  of the lower enclosure  61  via the leg members  140  and the pedestals  150  of the hanging device  100 . That is, the lateral beam member  111  bridges the upper ends of the pair of side wall plates  64  (S 7 : the lateral beam member arranging process and a height adjusting process). Thus, the installation of the hanging device  100  is completed. 
         [0092]    In the hanging device  100  having a T-shape when viewed from the top, when the installation is completed, the front end of the axial beam member  115  corresponding to the lower end of the T-shape is supported by the axial beam support seat  160 , and both ends of the lateral beam member  111  corresponding to both ends of both arms of the T-shape are supported by the side wall plates  64  of the lower enclosure  61  via the leg members  140  and the pedestals  150 . Therefore, the hanging device  100  is stably supported in the installed state. 
         [0093]    In the installed state of the hanging device  100 , the leg member  140  is placed on the pedestal  150  that is placed on the upper end surface of the side wall plate  64  of the lower enclosure  61 . As described above using  FIG. 8 , because the central portion in the lateral direction Dh of the pedestal  150  gently protrudes upward, even if the leg  141  of the leg member  140  is slightly tilted, it is possible to mitigate the stress concentration on the joint portion between the leg  141  and the leg seat  142 , the corner of the upper end of the side wall plate  64 , or the like. 
         [0094]    Further, in the installed state of the hanging device  100 , because the flanges (flange portions)  143  of the leg seats  142  are located on both sides in the lateral direction Dh of the side wall plates  64 , even if a slight load in the lateral direction Dh is applied to the leg member  140  or the bridge member  110  joined to the leg member  140 , it is possible to prevent the leg member  140  from deviating in the lateral direction Dh from the upper surface of the side wall plate  64 . in the present embodiment, although a pair of flanges  143  are provided in each of the two leg members  140 , the flange  143  may be provided only on the first side in the lateral direction Dh of one leg member  140  of the two leg members  140 , and the flange  143  may be provided only on the second side in the lateral direction Dh of the other leg member  140 . 
         [0095]    Further, in the installed state of the hanging device  100 , the second axial beam member  117  is located below the upper edge  36   a  of the rear plate opening  36 , the upper surface of the second axial beam member is lower than the upper edge  36   a  of the rear plate opening  36 , and meanwhile, the upper surface of the first axial beam member  116  and the upper surface of the third axial beam member  118  are higher than the upper edge  36   a  of the rear plate opening  36 . 
         [0096]    When installation of the hanging device  100  is completed, as illustrated In  FIGS. 17 and 18 , by hanging up a component P of the gas turbine  10  using the hanging tool  130  of the hanging device  100 , the component P is moved (S 8 : a component moving process). In the component moving process (S 8 ), the component P or the tike of the gas turbine  10  serving as a movement target is disassembled. After being disassembled, the component P is hung down from the hook  136  of the chain block  135  via a wire  139  or the like. Further, by winding up the chain  137  of the chain block  135 , the component P is raised so that the lower end of the component P is located over the lower edge of the rear plate opening  36  and the upper edge  14   b  of the outer casing  14  of the compressor  11 . Thereafter, by moving the trolley  131  with the chain block  135  mounted thereon to the rear side along the axial path  125 , the trolley  131  is moved to the connecting path  129  from the axial path  125 . Further, the connecting path  129  which supports the trolley  131  is rotated 90° to cause the connecting path  129  to face the lateral direction Dh. Next, by moving the trolley  131  to the lateral path  121  from the connecting path  129 , the trolley  131  is moved in the lateral direction Dh along the lateral path  121 . When the trolley  131  reaches the end of the lateral path  121 , the chain  137  of the chain block  135  is extended to place the component P within the enclosure  60  in the lateral direction Dh of the gas turbine  10 . Next, the wire  139  is detached from the component P, the component P is moved to the outside of the enclosure  60 , and the component P is repaired and inspected. 
         [0097]      FIG. 17  illustrates a state in which, slier the upper half of the connection cylinder  32  of the intake duct  30  is detached from the intake duct  30 , the wire  139  is hooked to a bearing cover  19  (P) of the front bearing  18   a  of the gas turbine  10 , and the wire  139  is hooked to the hook  136  of the chain block  135 . Further,  FIG. 18  illustrates a state in which the chain  137  of the chain block  135  is wound up to raise the bearing cover  19  (P) so that the lower end of the bearing cover  19  (P) is located above the lower edge of the rear plate opening  36  and the upper edge  14   b  of the outer casing  14 . 
         [0098]    As illustrated in  FIG. 18 , when the component P that is hung by the chain block  135  is moved along the axial path  125 , the lower end of the component P needs to be securely located over the lower edge of the rear plate opening  36  and the upper edge  14   b  of the outer casing  14 . Furthermore, the component P is preferably located as high as possible so that the lower end of the component P does not come into contact with the lower edge of the rear plate openings  36  and the upper edge  14   b  of the outer casing  14  even if the component P is tilted when the component P is moved along the axial path  125 . Therefore, the axial path  125  is preferably disposed at as high a position as possible inside the compressor connecting portion  31  of the intake duct  30 . 
         [0099]    Therefore, in the present embodiment, as illustrated in  FIG. 17 , the axial beam member  115  located above the axial path  125  is made up of three axial beam members  116 ,  117 , and  118 , and the second axial beam member  117  located in the middle in the axial direction Da is shifted downward relative to the other axial beam members  116  and  118 . Therefore, in the present embodiment, even if the positions of the upper surface of the first axial beam member  116  and the upper surface of the third axial beam member  118  are higher than the upper edge  36   a  of the rear plate opening  36 , the second axial beam member  117  can be located below the upper edge  36   a  of the rear plate opening  36 . In this way, in the installed state of the hanging device  100 , the upper surface of the second axial beam member  117  is lower than the upper edge  36   a  of the rear plate opening  36 , and meanwhile, the upper surface of the first axial beam member  116  and the upper surface of the third axial beam member  118  are higher than the upper edge  36   a  of the rear plate opening  36 . 
         [0100]    Incidentally, like the installed state of the hanging device  100 , in a state in which the upper surface of the third axial beam member  118  is higher than the upper edge of the rear plate opening  36 , the axial path  125  and the axial beam member  115  of the hanging device  100  cannot be inserted into the intake duct  30  from the rear plate opening  36 . Therefore, in the inserting process (S 5 ), as previously described with reference to  FIGS. 13 and 14 , in the state in which the upper edges of the second axial beam member  117  and the third axial beam member  118  are located below the upper edge of the rear plate opening  36  by tilting the hanging device  100  so that the front end of the hanging device  100  is located below the rear end, the axial path  125  and the axial beam member  115  are inserted into the intake duct  30  from the rear plate opening  36 . 
         [0101]    In the present embodiment, in the course of repair and inspection of the component P, when the hanging device  100  is installed on the lower enclosure  61 , the overhead crane  75  is used. However, after installing the hanging device  100 , it is possible to move the component P by the hanging device  100 , even without using the overhead crane  75 . Therefore, in the present embodiment, it is possible to significantly shorten the occupancy time of the overhead crane  75  in the course of repair and inspection of the component P. Furthermore, for example, by simultaneously using the hanging device  100  and the overhead crane  75  of the present embodiment. It is possible to perform the repair and inspection of the exhaust-side components of the gas turbine  10  at the same time as the repair and inspection of the intake-side component P of the gas turbine  10 . 
         [0102]    Therefore, in the present embodiment, it is possible to shorten the time for repair and inspection processes of the gas turbine  10 . 
         [0103]    Although an example of dismounting the component P of the gas turbine  10  has been described, when the dismounted component P is mounted, the processes in the flowchart illustrated in  FIG. 19  may be performed in reverse order. However, the process executed at the end in this case is the assembling process of the enclosure  60 , rather than the disassembling process of the enclosure  60 . 
       Modified Examples 
       [0104]    In the above-described embodiment, by rotating the linear connecting path  129 , the state in which the connecting path  129  is connected to the axial path  125  and the state in which the connecting path  129  is connected to the lateral path  121  are achieved. However, the connecting path  129  may be a fixed type instead of being rotated. In this case, the connecting path  129  may have one end connected to the axial path  125  and the other end connected to the lateral path  121 , and may be smoothly curved from one end to the other end. 
         [0105]    Further, although an example of dismounting the component P of the gas turbine  10  in the region in which the intake duct  30  is disposed using the hanging device  100  has been described, the components of the gas turbine  10  outside this region, for example, components of the components  21  and the like, may be dismounted using the hanging device  100 . In this way, when there is no need to insert a part of the hanging device  100  into the intake duct  30  in dismounting the components of the combustor  21  and the like, the components of the bridge member  110 , namely the axial beam member  115 , the axial path  125 , the connecting path  129 , and the rotation supporting member may be omitted. 
         [0106]    Further, although the hanging device  100  of the above-described embodiment is provided with the lateral paths  121  on both sides in the lateral direction Dh based on the central portion of the lateral beam member  111  in the lateral direction Dh, the lateral path  121  may be provided only on one side in the lateral direction Dh based on the central portion of the lateral beam member  111 , and in some cases, the lateral path  121  may not be provided in the lateral beam member  111 . 
         [0107]    Although the above-described embodiment is applied to the components of the gas turbine  10 , the present invention may be applied to components of a steam turbine. 
       INDUSTRIAL APPLICABILITY 
       [0108]    According to an aspect of the present invention, it is possible to shorten the time required for repair and inspection processes of the turbine. 
       REFERENCE SIGNS LIST 
       [0000]    
       
           10  Gas turbine (or simply turbine) 
           11  Compressor 
           12  Compressor rotor 
           13  Compressor casing 
           14  Outer casing 
           15  Inner casing 
           16  Gas turbine rotor 
           17  Gas turbine casing 
           21  Combustor 
           25  Turbine 
           25  Turbine rotor 
           27  Turbine casing 
           30  Intake duel 
           31  Compressor connecting portion 
           32  Connection cylinder 
           33  Front plate 
           34  Rear plate 
           35  Rear plate body 
           36  Rear plate opening 
           37  Lid 
           45  Duct vertical portion 
           46  Duct bent portion 
           47  Duct horizontal portion 
           49  Intake air filter device 
           50  Exhaust duct 
           55  Generator 
           60  Enclosure 
           61  Lower enclosure 
           62  Front wall plate 
           63  Rear wall plate 
           64  Side wall plate 
           65  Upper enclosure 
           70  Turbine building 
           75  Overhead crane 
           76  Traveling rail 
           77  Girder 
           78  Hoist 
           100  Hanging device 
           110  Bridge member 
           111  Lateral beam member 
           115  Axial beam member 
           116  First axial beam member 
           117  Second axial beam member 
           118  Third axial beam member 
           119  Connecting path rotation support portion 
           120  Traveling path 
           121  Lateral path (traveling path) 
           125  Axial path (traveling path) 
           129  Connecting path (traveling path) 
           130  Hanging tool 
           131  Trolley 
           132  Roller 
           135  Chain block 
           140  Leg member 
           141  Leg 
           142  Leg seat 
           143  Flange (flange portion) 
           150  Pedestal 
           160  Axial beam support seat