JP5863363B2 - Turbine building seismic isolation structure - Google Patents

Description

  The present invention relates to a seismic isolation structure for a turbine building in which a turbine generator such as a turbine and a generator is installed.

  As a conventional seismic isolation structure for a turbine building, for example, a turbine building that houses a turbine generator such as a turbine and a generator, and a common support base that supports the turbine generator, a lower part of the common support base and a turbine building are provided. There is a structure in which a seismic isolation mechanism is installed at the boundary. Such a conventional seismic isolation structure for a turbine building is disclosed in Patent Document 1, for example.

  Further, as another example of the conventional seismic isolation structure of the turbine building, the turbine building that houses the turbine generator and the common support base that supports the turbine generator, the boundary between the lower part of the common support base and the turbine building is provided. There is a structure in which a seismic isolation structure is installed in a part and a vibration control mechanism is installed inside the common support base or between the common support base and the turbine building. Such a conventional seismic isolation structure for a turbine building is disclosed in Patent Document 2, for example.

JP-A-59-1555692 (for example, see page 1, right column, line 19 to page 2, right upper column, line 18, lines 3 and 4) JP 2007-16599 A (see, for example, paragraphs [0025]-[0030], [0044], [FIG. 1]-[FIG. 3], [FIG. 11], etc.)

  However, in the conventional seismic isolation structure of the turbine building described above, the heavy load of the turbine generator such as the turbine and the generator is supported only by the common support base, and in order to ensure the rigidity of the common support base, The plate thickness of the support base was extremely large.

  In addition, the conventional seismic isolation structure of the turbine building described above exhibits seismic isolation performance in the vertical and horizontal translation directions at the time of the earthquake, but does not take into consideration the examination and countermeasures for rocking (rotation direction). When rocking occurs, the seismic isolation performance may be worse than the design value.

  From the above, the present invention has been made to solve the above-described problems, and reduces the plate thickness while ensuring the rigidity of the common support base on which the turbine generator is installed, such as an earthquake. It aims at providing the seismic isolation structure of the turbine building which can prevent generation | occurrence | production of the rocking | rocking in.

The seismic isolation structure of the turbine building according to the present invention that solves the above-described problems is as follows.
A turbine generator housed in a turbine building is supported on a common support base, the common support base is isolated in the vertical direction, and the turbine building is isolated in the horizontal direction. A seismic structure,
Said common support base surface plate with truss structure is provided, movable slide mechanism provided we are in a vertical direction between the turbine building and the truss structure,
The slide mechanism includes a wheel and a wheel support that rotatably supports the wheel,
The wheels are arranged so as to be able to move up and down the common support platform by rotating in contact with the side wall of the turbine building .

The seismic isolation structure of the turbine building according to the present invention that solves the above-described problem is a seismic isolation structure of the turbine building according to the above-described invention,
The truss structure is arranged on an outer edge portion of the common support base.

The seismic isolation structure of the turbine building according to the present invention that solves the above-described problem is a seismic isolation structure of the turbine building according to the above-described invention,
The slide mechanism is supported by jack bolts.

The seismic isolation structure of the turbine building according to the present invention that solves the above-described problem is a seismic isolation structure of the turbine building according to the above-described invention,
The wheel support has a truss structure.

  According to the present invention, by providing the truss structure on the common support base on which the turbine generator is installed, it is possible to reduce the plate thickness while ensuring the rigidity of the common support base. By providing a slide mechanism that can move in the vertical direction between the truss structure and the turbine building, the behavior of the common support base in an earthquake or the like becomes only in the vertical direction, and the occurrence of rocking can be prevented.

It is a figure for demonstrating the seismic isolation structure of the turbine building which concerns on 1st Example of this invention, Comprising: The whole is shown to FIG. 1A, The expansion of the enclosure line of FIG. 1A is shown to FIG. 1B. It is a figure for demonstrating the seismic isolation structure of the turbine building which concerns on 1st Example of this invention, Comprising: The plane of the state except the ceiling board of the turbine building is shown. It is a figure for demonstrating the seismic isolation structure of the turbine building which concerns on 2nd Example of this invention, Comprising: The whole is shown to FIG. 3A, and the expansion of the encircling line of FIG. 3A is shown to FIG. 3B.

  The form for implementing the seismic isolation structure of the turbine building which concerns on this invention is demonstrated in each Example.

  The seismic isolation structure of the turbine building according to the first embodiment of the present invention will be specifically described with reference to FIGS. 1A, 1B, and 2. FIG.

  The seismic isolation structure for a turbine building according to the present embodiment includes a horizontal seismic isolation device 1 installed between the turbine building 50 and the ground G, as shown in FIGS. 1A, 1B, and 2. A damping imparting mechanism 2 installed between the building 50 and the common support base 51 is provided. The horizontal seismic isolation device 1 is, for example, laminated rubber or the like, and forms horizontal seismic isolation means for isolating the turbine building 50 in the horizontal direction. The damping imparting mechanism 2 is, for example, a spring unit 3 or a hydraulic cylinder unit 4, and constitutes a vertical direction seismic isolation means for isolating the common support base 51 in the vertical direction. A turbine generator 60 is installed on the common support base 51. That is, in the seismic isolation structure of the turbine building, the turbine generator 60 housed in the turbine building 50 is supported on the common support base 51, and the common support base 51 is seismically isolated in the vertical direction. 50 is seismically isolated in the horizontal direction, forming a 3D seismic isolation structure for the turbine. The turbine generator 60 includes a gas turbine 61, a generator 68, and an auxiliary machine (not shown). The gas turbine 61 includes an intake duct 62 and an exhaust duct 65. The intake duct 62 includes a lower intake duct 63 and an upper intake duct 64. The exhaust duct 65 includes a lower-side exhaust duct 66 and an upper-side exhaust duct 67, similarly to the intake duct 62.

  The common support base 51 has, for example, a rectangular shape in plan view. On the common support base 51, the truss structure 10 using beams is installed along the outer edge of the common support base 51 so as to surround the above-described turbine generator 60. The truss structure 10 includes an upright column body 11, an upper beam body 14, and inclined column bodies 12 and 13. The upright columns 11 are arranged in an upright state at four corners on the common support base 51. The upper beam body 14 is arranged by connecting the upper portions of the upright column bodies 11 adjacent in the left-right direction and the front-rear direction. The inclined column bodies 12 and 13 are connected to the upper portion of the upright column body 11 and the common support base 51 between the upright column bodies 11 and 11 adjacent in the left-right direction and the front-rear direction, and the ends thereof are connected to each other. Be placed.

  An upper intake duct 64 and an upper exhaust duct 67 are fixed to the upper beam body 14 via fixing members 52 and 53, respectively. The upper-side intake duct 64 and the upper-side exhaust duct 67 communicate with the ceiling plate of the turbine building 50 and extend upward from the turbine building 2. The lower intake duct 63 is connected to the common support base 51. The lower intake duct 63 has a smaller diameter than the upper intake duct 64. An upper end opening 63 a of the lower intake duct 63 is disposed in the upper intake duct 64. The lower exhaust duct 66 described above is connected to the common support base 51. The lower exhaust duct 66 has a smaller diameter than the upper exhaust duct 67. An upper end opening 66 a of the lower side exhaust duct 66 is disposed in the upper side exhaust duct 67.

  The truss structure 10 is provided with a slide mechanism 20 supported by jack bolts (supports) 26. The slide mechanism 20 is movable in the vertical direction, and is provided, for example, between the upright column 11 of the truss structure 10 and the side wall 50a of the turbine building 50 facing the upright column 11. The slide mechanism 20 includes a wheel support 22 that rotatably supports the wheels 21 and 21. The wheel support 22 includes a wheel support piece 23 and a support plate body 25 fixed to the wheel support piece 23 via a connecting member 24. Bolt holes 25 a are formed on the upper surface portion side of the support plate body 25. The front end portion of the jack bolt 26 is engaged with the bolt hole 25a. Therefore, by rotating the jack bolt 26, the position of the slide mechanism 20 can be adjusted, and the wheel 21 of the slide mechanism 20 can be pressed against the side wall 50a of the turbine building 50. Thereby, the behavior of the common support base 51 at the time of an earthquake etc. becomes only an up-down direction, and the rocking behavior of the common support base 51 can be prevented. In addition, the truss structure 10 can also be used as a reaction force when the slide mechanism 20 is pressed by the jack bolt 26.

  As described above, according to the seismic isolation structure of the turbine building according to the present embodiment, the truss structure 10 is provided on the common support base 51, thereby improving the rigidity of the common support base 51 as a whole. In addition, the plate thickness of the common support base 51 can be reduced as compared with the conventional seismic isolation structure of the turbine building in which the truss structure is not installed on the common support base.

  The ducts 62 and 65 are respectively composed of lower ducts 63 and 66 and upper ducts 64 and 67, and the lower ducts 63 and 66 are connected to the common support base 51, while the upper ducts 64 and 67 are connected to the truss structure 10. The relative movement of the lower ducts 63 and 66 and the upper ducts 64 and 67 is defined only in the vertical direction. Thereby, the clearance gaps D1 and D2 between the ducts in the horizontal direction can be reduced as compared with the case of the conventional seismic isolation structure of the turbine building. In this case, since the pressure loss increases, the installation of the leakage prevention cover between the lower ducts 63 and 66 and the upper ducts 64 and 67 is omitted by increasing the duct wrap length and narrowing the gap. Can do.

  Further, by installing a corridor or the like in the truss structure 10, it is possible to also serve as a scaffold when inspecting the gas turbine, and it becomes unnecessary to newly assemble a scaffold during the inspection. That is, maintainability can be improved.

A seismic isolation structure for a turbine building according to a second embodiment of the present invention will be specifically described with reference to FIGS. 3A and 3B.
The present embodiment is a structure in which the configuration of the slide mechanism included in the seismic isolation structure of the turbine building according to the first embodiment described above is changed, and otherwise the seismic isolation of the turbine building according to the first embodiment. It has the same members as the structure. In this embodiment, the same members as those in the seismic isolation structure of the turbine building according to the first embodiment described above are denoted by the same reference numerals.

  As shown in FIGS. 3A and 3B, the base-isolated structure of the turbine building according to the present embodiment is the same as the above-described base-isolated structure of the turbine building according to the first embodiment. The generator 60 is supported on the common support base 51, the common support base 51 is isolated in the vertical direction, and the turbine building 50 is isolated in the horizontal direction. There is no.

  On the common support base 51, the upright column body 11, the upper beam body 14, and the inclined column bodies 12 and 13 are arranged along the outer edge of the common support base plate 51 so as to surround the turbine generator 60. A configured truss structure 10 is installed. Thereby, the rigidity of the common support base 51 as a whole can be improved, and the plate thickness of the common support base 51 is reduced as compared with the seismic isolation structure of the conventional turbine building in which the truss structure is not installed on the common support base. can do.

  In the above-described seismic isolation structure of the turbine building, the truss structure 10 is provided with a slide mechanism 30 supported by a plurality of jack bolts (supports) 39. The slide mechanism 30 is movable in the vertical direction, and includes a wheel 31 and a wheel support 32 that supports the wheel 31. The wheel support 32 includes a turbine building side wheel support piece 33, an upright column body side wheel support piece 34, a lateral support body 35, and inclined support bodies 37 and 38. The turbine building-side wheel support piece 33 rotatably supports the wheel 31 and extends in the vertical direction in the vicinity of the side wall 50 a of the turbine building 50. The upright column body side wheel support piece 34 is disposed opposite to the turbine building side wheel support piece 33 and extends in the vertical direction in the vicinity of the upright column body 11. The horizontal support 35 connects the turbine building side wheel support piece 33 and the upright column body side support piece 34 in the vicinity of the wheel 31. The inclined supports 37 and 38 connect the turbine building side wheel support piece 33 and the upright column body side support piece 34 in an oblique direction in the vicinity of the horizontal support 35. That is, the wheel support 32 has a truss structure. Bolt holes 34 a are respectively formed at the connection portions of the upright column body side support pieces 34 with the lateral support bodies 35. The front end portion of the jack bolt 39 is engaged with the bolt hole 34a. Therefore, by rotating the jack bolt 39, the position of the slide mechanism 30 can be adjusted, and the wheel 31 of the slide mechanism 30 can be pressed against the side wall 50a of the turbine building 50. Thereby, the behavior of the common support base 51 at the time of an earthquake etc. becomes only an up-down direction, and the rocking behavior of the common support base 51 can be prevented. In addition, the truss structure 10 can also be used as a reaction force when the slide mechanism 30 is pressed by the jack bolt 39.

  As described above, according to the seismic isolation structure of the turbine building according to the present embodiment, the truss structure 10 is mounted on the common support base 51 in the same manner as the above-described seismic isolation structure of the turbine building according to the first embodiment. By providing, the rigidity of the common support base 51 as a whole can be improved, and the thickness of the common support base 51 is the same as that of a conventional turbine building seismic isolation structure in which no truss structure is installed on the common support base. Can be reduced.

  Since the wheel support 32 of the slide mechanism 30 has a truss structure, the reaction force when the slide mechanism 30 is pressed by the jack bolt 39 is increased as compared with the case where the wheel support 32 is not of the truss structure. The rigidity of the can be improved.

  The seismic isolation structure of the turbine building according to the present invention can reduce the plate thickness while ensuring the rigidity of the common support base on which the turbine generator is installed, and can prevent the occurrence of rocking due to an earthquake, etc. It can be used beneficially in power plants.

DESCRIPTION OF SYMBOLS 1 Horizontal seismic isolation device 2 Damping provision mechanism 3 Spring unit 4 Hydraulic cylinder unit 10 Truss structure 11 Upright column body 12, 13 Inclined column body 14 Upper beam body 20 Slide mechanism 21 Wheel 22 Wheel support tool 23 Wheel support piece 24 Connecting member 25 Support plate body 26 Jack bolt 30 Slide mechanism 31 Wheel 32 Wheel support 33 Turbine building side wheel support piece 34 Upright column body side wheel support piece 35 Lateral support bodies 37 and 38 Inclined support body 39 Jack bolt 50 Turbine building 51 Common support base 52, 53 Fixed member 60 Turbine generator 61 Gas turbine 62 Intake duct 65 Exhaust duct 68 Generator G Ground

Claims (4)

A turbine generator housed in a turbine building is supported on a common support base, the common support base is isolated in the vertical direction, and the turbine building is isolated in the horizontal direction. A seismic structure,
Said common support base surface plate with truss structure is provided, movable slide mechanism provided we are in a vertical direction between the turbine building and the truss structure,
The slide mechanism includes a wheel and a wheel support that rotatably supports the wheel,
The seismic isolation of the turbine building, wherein the wheels are arranged so as to be able to move up and down the common support platform by rotating in contact with a side wall portion of the turbine building. Construction. A seismic isolation structure for a turbine building according to claim 1,
The said truss structure is arrange | positioned in the outer edge part of the said common support stand, The seismic isolation structure of the turbine building characterized by the above-mentioned. A seismic isolation structure for a turbine building according to claim 1 or claim 2,
A seismic isolation structure for a turbine building, wherein the slide mechanism is supported by jack bolts. A seismic isolation structure for a turbine building according to claim 1 ,
A seismic isolation structure for a turbine building, wherein the wheel support has a truss structure.

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