Turbine frame, turbine device, and manufacturing method for turbine frame

Abstract

To make it possible to reduce working time for installing connection members.SOLUTION: A medium-low pressure steam turbine 3 and a high pressure steam turbine 2 connected to an external device by cables are installed on a turbine frame 10. The turbine frame comprises a base part 11 comprising a placement surface 11a on which the medium-low pressure steam turbine 3 and the high pressure steam turbine 2 are placed, and supporting the medium-low pressure steam turbine 3 and the high pressure steam turbine 2 from below. A trench 12 recessed from the placement surface 11a is formed in the base part 11. The cables, etc. are housed inside the trench 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to turbine cradles and turbine devices, and methods of manufacturing turbine cradles. [Background technology]

[0002] Patent Document 1 discloses a turbine assembly stand in which turbine sections are assembled onto a stand to form a unit. This stand has a turbine installed on its mounting surface. A junction box is attached to the side wall of the stand, connecting signals from operation monitoring instruments to electrical wiring outside the turbine assembly. A cable tray is provided below the junction box on the side wall of the stand along the longitudinal direction of the stand, and a relay connector is disposed inside the cable tray. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-163234 Summary of the Invention [Problem to be solved by the invention]

[0004] The turbines installed in power plants and the like are large and heavy, so the racks on which the turbines are installed are made of concrete with reinforcing bars (hereinafter, the reinforcing bars will be referred to as "reinforcing bars") and are designed to withstand heavy loads. In such a mounting system, connecting members such as cables extending from the turbine may be buried inside the concrete. In such cases, it is necessary to check at the design stage whether the buried connecting members interfere with the reinforcement, which can complicate the design work and increase the time required for the design. Furthermore, when installing the connecting members, adjustment of the installation position of the connecting members is required, which may make the installation work more complicated and increase the time required for the work.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a turbine frame, a turbine device, and a method for manufacturing a turbine frame that can reduce the work time required to install connecting members. Another object of the present invention is to provide a turbine cradle and a method for manufacturing the turbine cradle that can reduce the time required for design. [Means for solving the problem]

[0006] In order to solve the above problems, the turbine frame, the turbine device, and the method for manufacturing the turbine frame according to the present disclosure employ the following measures. A turbine stand according to one aspect of the present disclosure is a turbine stand for installing a turbine that is connected to an external device via a connecting member, the turbine stand having a mounting surface on which the turbine is placed and a base that supports the turbine from below, the base having a trench recessed from the mounting surface, and the connecting member housed inside the trench.

[0007] A method for manufacturing a turbine frame according to one aspect of the present disclosure is a method for manufacturing a turbine frame for installing a turbine that is connected to an external device via a connecting member, the turbine frame having a mounting surface on which the turbine is placed and a base that supports the turbine from below, the method including the steps of forming a trench in the base that is recessed from the mounting surface, and accommodating the connecting member inside the trench. [Effects of the Invention]

[0008] According to the present disclosure, the time required to install a connection member can be reduced. Furthermore, according to the present disclosure, it is possible to reduce the time required for design. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view of a turbine cradle according to an embodiment of the present disclosure. [Figure 2]FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along the arrow BB in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a turbine cradle, a turbine device, and a method for manufacturing a turbine cradle according to the present disclosure will be described below with reference to the drawings. In the following description and drawings, the vertical direction is referred to as the Z-axis direction, the horizontal direction of the turbine cradle is referred to as the Y-axis direction, and the horizontal direction of the turbine cradle is referred to as the X-axis direction.

[0011] A turbine frame 10 according to an embodiment of the present disclosure is applied to a turbine device 1 provided in, for example, a power plant or the like. As shown in Figure 1, the turbine device 1 includes a high-pressure steam turbine 2 to which steam generated in a boiler (not shown) is supplied, a medium- and low-pressure steam turbine 3 to which steam discharged from the high-pressure steam turbine 2 is supplied, a generator 4 that generates electricity using the driving force of the high-pressure steam turbine 2 and the medium- and low-pressure steam turbine 3, a turbine enclosure 5 that houses the high-pressure steam turbine 2 and the medium- and low-pressure steam turbine 3, and a turbine frame 10 that supports the high-pressure steam turbine 2 and the medium- and low-pressure steam turbine 3 from below.

[0012] The high-pressure steam turbine 2 has a turbine (not shown) that rotates about a central axis C1. The high-pressure steam turbine 2 is centered on the central axis C1 and extends along the central axis C1. The central axis C1 extends along the Y-axis direction. The medium-low pressure steam turbine 3 has a turbine (not shown) that rotates around a central axis C2. The medium-low pressure steam turbine 3 is centered on the central axis C2 and extends along the central axis C2. The central axis C2 extends along the Y-axis direction. The high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 are arranged such that the central axis C1 and the central axis C2 are misaligned in the horizontal direction.

[0013] The high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 are connected to an external device (not shown) by a cable 21 (see FIG. 3) and mechanical piping 22 (see FIG. 3). The high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 do not have to be directly connected to the external device by the cable 21 and mechanical piping 22. The high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 may be connected to the external device via the cable 21 and mechanical piping 22. The high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 may also be connected to the cable 21 and mechanical piping 22 via some kind of member.

[0014] An example of the cable (connecting member) 21 is a transmission cable that transmits detection signals from operation monitoring instruments consisting of vibration sensors (not shown) and temperature sensors (not shown) that detect turbine operating conditions such as vibration and temperature installed in each part of the high-pressure steam turbine 2 and the medium-low-pressure steam turbine 3 to an external device.

[0015] The connection points between the high-pressure steam turbine 2 and the cables 21, mechanical piping 22, etc. (i.e., the connection portions with the cables 21, etc. provided on the high-pressure steam turbine 2) are provided on the trench 12 side of the central axis C1 (i.e., the lower side in FIG. 1). The direction in which the cables 21, mechanical piping 22, etc. are pulled out from the high-pressure steam turbine 2 is the direction in which the trench 12 is provided. Note that all of the connection points between the high-pressure steam turbine 2 and the cables 21, mechanical piping 22, etc. may be provided on the trench 12 side of the central axis C1.

[0016] The connection points between the medium- and low-pressure steam turbine 3 and the cables 21, mechanical piping 22, etc. (i.e., the connection portions with the cables 21, etc. provided on the medium- and low-pressure steam turbine 3) are provided on the trench 12 side (i.e., the lower side in FIG. 1 ) of the central axis C2. The direction in which the cables 21, mechanical piping 22, etc. are pulled out from the medium- and low-pressure steam turbine 3 is the direction in which the trench 12 is provided. Note that all of the connection points between the medium- and low-pressure steam turbine 3 and the cables 21, mechanical piping 22, etc. may be provided on the trench 12 side of the central axis C2.

[0017] The cable 21 is connected to an external device via a junction box 23 and a relay terminal board 24 . The cable 21 is housed in a tray 30 .

[0018] Examples of the mechanical piping (connecting member) 22 include piping through which lubricating oil supplied to the high-pressure steam turbine 2 and the medium-low pressure steam turbine 3 flows, and piping through which oil used for control flows.

[0019] The turbine frame 10 has a base 11 that supports the high-pressure steam turbine 2, the intermediate / low-pressure steam turbine 3, the generator 4, peripheral equipment, etc. from below. The base 11 has a mounting surface 11a on which the high-pressure steam turbine 2, the intermediate / low-pressure steam turbine 3, the generator 4, peripheral equipment, etc. are mounted. A turbine enclosure 5 is erected on the mounting surface 11a. Because the high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3 are heavy objects, a large load is placed on the base 11 of the turbine cradle 10. For this reason, the base 11 of the turbine cradle 10 is made of concrete with excellent load-bearing capacity and reinforcing bars (not shown) laid throughout the interior. In the following explanation, the reinforcing bars will be referred to as "reinforcing bars."

[0020] Furthermore, a plurality of trenches (grooves) 12 recessed downward from the mounting surface 11a are formed in the base 11 of the turbine cradle 10. Each trench 12 is formed at one end in the X-axis direction. Each trench 12 is also formed so as to recess from one side surface of the base 11 in the X-axis direction. In other words, the side surface of the base 11 on one side in the X-axis direction is connected to the outside by providing the trenches 12. Each trench 12 is formed at a position that does not overlap with each device mounted on the mounting surface 11a of the base 11, such as the high-pressure steam turbine 2 and the medium- to low-pressure steam turbine 3, in a plan view.

[0021] Cables (connecting members) 21, mechanical piping (connecting members) 22, etc. are housed inside each trench 12. Each trench 12 is formed at one end in the X-axis direction. A space is formed inside each trench 12. That is, the cables (connecting members) 21, mechanical piping (connecting members) 22, etc. are provided in the space formed inside each trench 12.

[0022] Each trench 12 is provided with a trench cover (lid portion) 13 that covers from above the space formed inside each trench 12. In other words, the upper part of the space formed inside each trench 12 is defined by the trench cover 13.

[0023] The plurality of trenches 12 are arranged side by side at predetermined intervals along the Y-axis direction. In the following, the trench 12 provided adjacent to the medium / low pressure steam turbine 3 will be described as a representative example.

[0024] A trench 12 (hereinafter simply referred to as "trench 12") provided adjacent to the medium-low pressure steam turbine 3 has a space (hereinafter referred to as "internal space S") formed therein, as shown in Fig. 2. As shown in Fig. 3, the internal space S has a cable arrangement space S1 in which cables 21 are provided, and a mechanical piping arrangement space S2 in which mechanical piping 22 is provided. The cable arrangement space S1 is formed inside a relay terminal board support (support portion) 14, which will be described later. The cable arrangement space S1 and the mechanical piping arrangement space S2 are arranged side by side in the Y-axis direction.

[0025] 2 and 3, a trench cover 13 is provided at the upper end of the trench 12 to cover the internal space S from above. The trench cover 13 closes an opening formed above the trench 12.

[0026] An intermediate terminal board support 14 is provided inside the trench 12. The intermediate terminal board support 14 is provided at the end (outer end) of the trench 12 in the X-axis direction and at the end in the Y-axis direction. The intermediate terminal board support 14 has a frame-like rectangular parallelepiped shape. That is, the intermediate terminal board support 14 is a rectangular parallelepiped member with a space formed inside, and openings are formed on each side. Each opening connects the space formed inside the intermediate terminal board support 14 with the space outside the intermediate terminal board support 14.

[0027] The relay terminal board support 14 supports the relay terminal board 24 from below. As shown in Figures 1 and 3, the relay terminal board 24 is installed so as to straddle the mounting surface 11a of the base 11 and the relay terminal board support 14. That is, a portion of the relay terminal board 24 in the Y-axis direction is placed on the mounting surface 11a of the base 11, and the remaining portion of the relay terminal board 24 in the Y-axis direction is placed on the upper surface of the relay terminal board support 14.

[0028] 2, the relay terminal board 24 is connected to a cable 21 extending from an operation monitoring instrument that monitors the operation of the medium- and low-pressure steam turbine 3 and a cable 121 connected to an external device. The relay terminal board 24 relays the cable 21 connected to the medium- and low-pressure steam turbine 3 and the cable 121 connected to the external device.

[0029] The trench 12 is formed in the vicinity of a connection point (not shown) where the cables 21 are gathered.

[0030] As shown in FIG. 3, the cable 21 connecting the intermediate / low pressure steam turbine 3 and the relay terminal board 24 is housed in a tray 30. As shown in Figures 1 and 2, the tray 30 has an outer-trench tray 30a fixed on the mounting surface 11a of the base 11 via a tray support 33, and an inner-trench tray 30b provided within the trench 12 via the tray support 33.

[0031] The trench outer tray 30a is provided outside the trench 12. As shown in FIG. 1, the trench outer tray 30a is provided between the intermediate / low pressure steam turbine 3 and the trench 12. As shown in FIGS. 1 and 2, a junction box 23 is provided above the trench outer tray 30a. A cable 21 extending from the intermediate / low pressure steam turbine 3 is connected to the junction box 23. As shown in FIG. 2, the cable 21 housed in a flexible pipe 31 and an electrical conduit 32 extends downward from the junction box 23. The lower end of the cable 21 extending downward from the junction box 23 is housed inside the trench outer tray 30a. The cable 21 in the trench outer tray 30a extends along the trench outer tray 30a. The trench outer tray 30a is covered from above by a trench cover 30c.

[0032] As shown in Fig. 2, the end of the trench outer tray 30a on the trench 12 side is connected to the trench inner tray 30b. The trench inner tray 30b is fixed to the inner wall and bottom surface of the trench 12 by tray supports 33. The trench inner tray 30b accommodates the cable 21 therein. The cable 21 in the trench outer tray 30a and the cable 21 in the trench inner tray 30b are connected.

[0033] The intra-trench tray 30b has a vertical portion extending along the inner wall of the trench 12 and a horizontal portion extending along the bottom surface of the trench 12. The trench side end of the trench outer tray 30a is connected to the upper end of the vertical portion of the intra-trench tray 30b. The lower end of the vertical portion of the intra-trench tray 30b is connected to the horizontal portion of the intra-trench tray 30b. The horizontal portion of the intra-trench tray 30b extends along the X-axis direction to the vicinity of the relay terminal board support 14. Inside the relay terminal board support 14, the cable 21 is bent upward and extends upward. The cable 21 is connected to the relay terminal board 24. More specifically, the cable 21 enters the relay terminal board 24 and is connected to a terminal (not shown) provided within the relay terminal board 24. A cable 121 connected to an external device is also connected to the relay terminal board 24. More specifically, the cable 121 enters the relay terminal board 24 and is connected to a terminal (not shown) provided within the relay terminal board 24. The cable 121 extends to the outside of the trench 12. Outside the trench 12, the cable 121 is housed in a conduit 132.

[0034] 3, a plurality of mechanical pipes 22 are arranged in the mechanical pipe arrangement space S2 in the trench 12. The plurality of mechanical pipes 22 are arranged side by side at predetermined intervals in the Y-axis direction.

[0035] When placing the cable 21 or the like in the trench 12, first, the trench 12 is formed in the base 11. There is no particular limitation on the method for forming the trench 12 in the base 11. Once the trench 12 is formed, the cable 21 or the like is then housed in the trench 12.

[0036] According to this embodiment, the following advantageous effects are achieved. One possible method for installing the cables 21 and mechanical piping 22 in the base 11 of the turbine cradle 10 is to bury the cables 21 in the base 11 of the turbine cradle 10 and expose the mechanical piping 22 from the base 11. However, because the base 11 is provided with reinforcement, it is necessary to check for interference between the buried cables 21 and the reinforcement at the time of design, which makes the design work complicated and may increase the time required for the design. Furthermore, the installation work of the cables 21 also requires adjustment of the installation position of the cables 21, which may make the installation work complicated and increase the time required for the work. On the other hand, in this embodiment, a trench 12 recessed from the mounting surface 11a is formed in the base 11, and the cable 21 and mechanical piping 22 are housed inside the trench 12. This allows the cable 21 to be installed more easily than if the cable 21 were buried in the base 11. Therefore, the installation work of the cable 21 can be simplified, and the work time can be reduced. Furthermore, the design work can be simplified, thereby reducing the time required for design.

[0037] Furthermore, since it is easier to access the cables 21 and the mechanical piping 22 than if they were buried in the base 11, the maintainability of the cables 21 and the mechanical piping 22 can be improved.

[0038] The base 11 may be formed of concrete with reinforcing bars strung throughout the interior (hereinafter, the reinforcing bars will be referred to as "reinforcing bars"), and the trench 12 may not be provided with reinforcing bars. In this configuration, the base 11 can withstand a large load, so that even a turbine with a large load can be supported by the turbine frame 10. Furthermore, in addition to being able to support such a high load, the reinforcing bars do not get in the way when installing the cables 21 and mechanical piping 22, which simplifies the installation work.

[0039] Furthermore, since the reinforcement does not interfere with the cables 21 and the mechanical piping 22, the design work can be simplified. The external device may be a device that is not installed on the turbine cradle 10.

[0040] In this embodiment, a trench cover 13 is provided that covers from above the space formed inside the trench 12. This makes it difficult for foreign objects such as tools and dust to enter the internal space S of the trench 12. In addition, workers can pass over the trench 12. Furthermore, since the cables 21 and the mechanical piping 22 are not exposed to the external space, the cables 21 and the mechanical piping 22 are less likely to be damaged.

[0041] In this embodiment, the relay terminal board 24 is provided directly above the trench 12. That is, the relay terminal board 24 is arranged so as to overlap the trench 12 in a plan view. This allows the distance between the trench 12 and the relay terminal board 24 to be shorter than when the relay terminal board 24 is not provided directly above the trench 12 (that is, when the trench 12 and the relay terminal board 24 are arranged so as to be horizontally offset in a plan view). Therefore, the length of the cable 21 on the turbine side can be shortened. In particular, the length of the cable 21 arranged outside the trench 12 can be shortened.

[0042] In this embodiment, a relay terminal board support 14 that supports the relay terminal board 24 from below is provided inside the trench 12. This allows the relay terminal board 24 to be supported in an appropriate manner.

[0043] In this embodiment, the trench 12 is provided near the connection point where the cables 21 are gathered. This shortens the distance between the trench 12 and the connection point. Therefore, the length of the cables 21 from the connection point to the trench 12 can be shortened.

[0044] In this embodiment, a cable arrangement space S1 in which the cable 21 is arranged and a mechanical piping arrangement space S2 in which the mechanical piping 22 is arranged are formed within the trench 12. This allows both the cable 21 and the mechanical piping 22 to be installed within the trench 12. Therefore, the installation work for both the cable 21 and the mechanical piping 22 can be simplified.

[0045] In this embodiment, the trench 12 is formed at a position that does not overlap with the turbines (the high-pressure steam turbine 2 and the intermediate / low-pressure steam turbine 3) in a plan view. In other words, the trench 12 is formed at a position where the effect of the turbine load is small. This allows the turbine to be suitably supported by the base 11.

[0046] In this embodiment, the turbines (high-pressure steam turbine 2 and intermediate-low-pressure steam turbine 3) have their connection portions with the cable 21 and mechanical piping 22 located closer to the trench 12 than the central axis C1 and central axis C2. This allows the distance from the connection portion to the trench 12 to be shortened, and therefore the lengths of the cable 21 and mechanical piping 22 can be shortened.

[0047] The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure. For example, the boiler provided in the power plant to which the turbine cradle according to the present disclosure is applied is not particularly limited, and may be, for example, a once-through boiler, a circulating boiler, or a circulating fluidized bed (CFB) boiler.

[0048] The turbine cradle, the turbine device, and the method for manufacturing the turbine cradle according to the above-described embodiments can be understood, for example, as follows. A turbine stand according to a first aspect of the present disclosure is a turbine stand (10) for installing turbines (2, 3) connected to external devices by connecting members (21, 22), the turbine stand having a mounting surface (11a) on which the turbines (2, 3) are placed and a base (11) for supporting the turbines (2, 3) from below, the base (11) having a trench (12) recessed from the mounting surface (11a), the trench (12) accommodating the connecting members (21, 22) inside.

[0049] In the above configuration, a trench recessed from the mounting surface is formed in the base, and the connecting member is housed inside the trench. This allows the connecting member to be installed more easily than if it were embedded in the base. Therefore, the installation work of the connecting member can be simplified, thereby reducing the installation time.

[0050] Furthermore, since the connection member can be accessed more easily than when it is buried in the base, the maintainability of the connection member can be improved.

[0051] The external device may be a device that is not installed on the turbine frame.

[0052] Further, in the turbine cradle according to a second aspect of the present disclosure, in the first aspect, the base (11) is formed of concrete with reinforcing bars strung throughout the interior.

[0053] In the above configuration, the base is made of concrete with reinforcing bars strung throughout (hereinafter, the reinforcing bars will be referred to as "reinforcement"). Because the base can withstand large loads, the turbine frame can support even turbines with heavy loads. On the other hand, since the trench is not provided with reinforcement, it can support such a high load and the reinforcement does not get in the way when installing the connecting member in the trench, which simplifies the installation work of the connecting member. Furthermore, since there is no interference between the reinforcement and the connecting members, the structure can be simplified, which also facilitates the design work of the turbine frame.

[0054] Furthermore, the turbine cradle according to a third aspect of the present disclosure is the turbine cradle of the first or second aspect, further comprising a lid (13) that covers the space formed inside the trench (12) from above.

[0055] The above-described configuration includes a lid that covers the space formed inside the trench from above. This makes it difficult for tools, dust, etc. to enter the internal space of the trench. Also, workers can pass over the trench 12. Furthermore, since the connection member is not exposed to the external space, the connection member is less likely to be damaged.

[0056] In addition, in a turbine frame according to a fourth aspect of the present disclosure, in any of the first to third aspects, a relay terminal board (24) is provided directly above the trench (12) to relay the connection members (21, 22) on the turbine (2, 3) side and the connection members (21, 22) on the external device side.

[0057] In the above configuration, the relay terminal board is provided directly above the trench. That is, the relay terminal board is arranged so as to overlap with the trench in a plan view. This allows the distance between the trench and the relay terminal board to be shorter compared to when the relay terminal board is not provided directly above the trench (that is, when the trench and the relay terminal board are arranged so as to be horizontally offset in a plan view). Therefore, the length of the connecting member on the turbine side can be shortened. In particular, the length of the connecting member arranged outside the trench can be shortened.

[0058] Furthermore, in the turbine cradle according to a fifth aspect of the present disclosure, in the fourth aspect, a support portion (14) that supports the relay terminal board (24) from below is provided in the trench (12).

[0059] In the above-described configuration, a support portion is provided in the trench to support the relay terminal board from below, thereby enabling the relay terminal board to be supported in an appropriate manner.

[0060] Furthermore, a turbine frame according to a sixth aspect of the present disclosure is any one of the first to fifth aspects, in which a plurality of the connection members (21, 22) are provided, and the trench (12) is formed in the vicinity of a connection point where the plurality of the connection members (21, 22) are gathered together.

[0061] In the above configuration, the trench is provided near the connection point where each connection member is gathered, which shortens the distance between the trench and the connection point, thereby shortening the length of the connection member from the connection point to the trench.

[0062] In addition, the turbine frame according to a seventh aspect of the present disclosure is any one of the first to sixth aspects, wherein the connecting members (21, 22) have a cable (21) and a mechanical piping (22), and a cable arrangement space (S1) in which the cable (21) is arranged and a mechanical piping arrangement space (S2) in which the mechanical piping (22) is arranged are formed within the trench (12).

[0063] In the above configuration, a cable placement space in which the cable is placed and a mechanical piping placement space in which the mechanical piping is placed are formed in the trench, which allows both the cable and the mechanical piping to be installed in the trench, thereby simplifying the installation work for both the cable and the mechanical piping.

[0064] Furthermore, the turbine frame according to an eighth aspect of the present disclosure is any one of the first to seventh aspects, wherein the trench (12) is formed at a position that does not overlap with the turbines (2, 3) in a plan view.

[0065] In the above configuration, the trench is formed at a position that does not overlap with the turbine in a plan view. That is, the trench is formed at a position where the effect of the turbine load is small. This allows the turbine to be supported appropriately on the base.

[0066] Furthermore, a turbine device according to a first aspect of the present disclosure includes a turbine frame (10) according to any one of the first to eighth aspects, turbines (2, 3) installed on the turbine frame (10) and arranged along central axes (C1, C2), and connecting members (21, 22) connected to the turbines (2, 3), wherein a connecting portion of the turbines (2, 3) with the connecting members (21, 22) is arranged closer to the trench (12) than the central axes (C1, C2).

[0067] In the above configuration, the turbine is provided with a connection portion with the connection member on the trench side of the central axis, which shortens the distance from the connection portion to the trench, thereby shortening the length of the connection member.

[0068] A manufacturing method for a turbine frame according to a first aspect of the present disclosure is a manufacturing method for a turbine frame (10) for installing turbines (2, 3) connected to external devices by connecting members (21, 22), the turbine frame (10) having a mounting surface (11a) on which the turbines (2, 3) are placed and a base (11) for supporting the turbines (2, 3) from below, the manufacturing method comprising the steps of: forming a trench (12) in the base (11) recessed from the mounting surface (11a); and accommodating the connecting members (21, 22) inside the trench (12). [Explanation of symbols]

[0069] 1: Turbine equipment 2: High-pressure steam turbine 3: Medium and low pressure steam turbine 4: Generator 5: Turbine enclosure 10: Turbine stand 11: Base 11a: Placement surface 12: Trench 13: Trench cover (lid) 14: Relay terminal board support (support part) 21: Cable (connecting part) 22: Mechanical piping (connecting parts) 23: Junction box 24: Relay terminal board 30: Tray 30a: Trench outer tray 30b: Tray in trench 30c: Trench cover 31: Flexible pipe 32:Conduit 33: Tray support 121: Cable 132:Conduit S:Internal space S1: Cable layout space S2: Mechanical piping arrangement space

Claims

1. A turbine frame for installing a turbine connected to an external device by a connecting member, a base having a mounting surface on which the turbine is mounted and supporting the turbine from below; a trench recessed from the mounting surface is formed in the base; The trench contains a turbine cradle in which the connecting member is housed.

2. 2. The turbine rack according to claim 1, wherein the base is made of concrete with reinforcing bars strung throughout the base.

3. The turbine rack according to claim 1 , further comprising a lid portion that covers the space formed inside the trench from above.

4. 2. The turbine frame according to claim 1, wherein a relay terminal board for relaying the turbine-side connecting member and the external device-side connecting member is provided immediately above the trench.

5. The turbine rack according to claim 4, wherein a support portion is provided in the trench to support the relay terminal board from below.

6. The connecting members are provided in plurality, The turbine rack according to claim 1 , wherein the trench is formed in the vicinity of a connection point where the plurality of connection members are gathered.

7. the connecting member includes a cable and a mechanical piping; The turbine rack according to claim 1 , wherein a cable arrangement space in which the cables are arranged and a mechanical piping arrangement space in which the mechanical piping is arranged are formed within the trench.

8. The turbine rack according to claim 1 , wherein the trench is formed at a position that does not overlap with the turbine in a plan view.

9. The turbine rack according to any one of claims 1 to 8, a turbine mounted on the turbine frame and arranged along a central axis; a connecting member connected to the turbine, The turbine is a turbine device in which a connection portion with the connection member is provided on the trench side relative to the central axis.

10. A method for manufacturing a turbine frame for installing a turbine connected to an external device by a connecting member, comprising: the turbine frame has a mounting surface on which the turbine is mounted and includes a base that supports the turbine from below; forming a trench in the base portion that is recessed from the mounting surface; and accommodating the connection member inside the trench.

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