JP2017110494A - Structure support structure and gas turbine facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure support structure that can inhibit heat from inputting to a floor face from a structure, and to provide a gas turbine facility.SOLUTION: The structure support structure for fixing a foundation steel material 20 provided in a lower part of a muffler 12 to a floor face F by a foundation bolt 50 includes: a bolt pedestal 41 provided between a head part 51 of the foundation bolt 50 and a lower plate 22 of the foundation steel material 20 and being pressed on a side of the floor face F by the head part 51 of the foundation bolt 50 penetrating therethrough; and a heat insulation material 31 provided between the bolt pedestal 41 and the lower plate 22 of the foundation steel material 20.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a structure support structure that suppresses heat input from a structure to a floor surface that supports the structure.

  Conventionally, in gas turbine equipment, exhaust gas discharged from a gas turbine is released into the atmosphere via a silencer, a chimney, and the like. At this time, since the high-temperature exhaust gas passes through the silencer, the silencer is kept at a high temperature. And when the silencer is being fixed to the concrete floor by the foundation bolt, the temperature of the silencer is transmitted to the floor via the foundation bolt.

  Here, the safety of the gas turbine and the equipment attached to it is stipulated by various laws and regulations. In particular, the safety of the emergency gas turbine equipment installed at the nuclear power plant is strictly stipulated. Has been. For example, in a silencer installed in an emergency gas turbine facility, temperature management for heat input to the floor is strictly regulated. For this reason, when fixing a silencer to a floor surface with a foundation bolt, it is necessary to suppress heat transmitted from the silencer to the floor surface via the foundation bolt.

  Conventionally, various support structures for structures have been provided in which heat transmitted from the structure to the floor surface via foundation bolts is suppressed. Such a structure support structure is disclosed in Patent Document 1, for example.

JP 2012-219523 A

  However, in the conventional support structure described above, when the structure is fixed to the concrete wall with bolts, the bolts directly press the heat insulating member. Thereby, since the heat insulation member is formed with a synthetic resin etc., there exists a possibility that a heat insulation member may be damaged depending on the magnitude | size of the fastening force (axial force) of a volt | bolt.

  Furthermore, in the conventional support structure, since only the heat insulating member is interposed between the bolt and the structure, the temperature of the structure is transmitted to the bolt depending on the thickness and heat insulating performance of the heat insulating member. As a result, there is a possibility that heat input to the concrete wall cannot be sufficiently suppressed.

  Therefore, this invention solves the said subject, and provides the support structure of the structure which can suppress the heat input from a structure to a floor surface, and a gas turbine equipment provided with the support structure. With the goal.

The structure support structure according to the first invention for solving the above-described problems is
A structure support structure for fixing a base steel material provided at a lower part of the structure to a floor surface by a foundation bolt,
A bolt pedestal provided between the head of the foundation bolt and the foundation steel material and pressed against the floor surface by the head of the foundation bolt penetrating through the inside,
A heat insulating material provided between the bolt pedestal and the base steel material is provided.

The structure support structure according to the second invention for solving the above-mentioned problems is
An extension member connected to the foundation steel material and disposed outside the structure and the foundation steel material;
Between the head of the foundation bolt and the extension member, the bolt pedestal that is pressed to the floor side by the head of the foundation bolt penetrating through the inside is interposed,
The height of the bolt pedestal installed on the extension member is higher than the height of the bolt pedestal installed on the basic steel material.

A structure support structure according to a third aspect of the present invention for solving the above problem is as follows:
The bolt base is
It has a pedestal ventilation path which connects the perimeter part of the bolt pedestal, and the shaft part of the foundation bolt which penetrates the bolt pedestal.

A structure support structure according to a fourth aspect of the present invention for solving the above problem is as follows:
The pedestal ventilation path is formed radially with the foundation bolt as a center.

A structure support structure according to a fifth aspect of the present invention for solving the above-described problem is
The pedestal ventilation path is formed coaxially with the foundation bolt.

A structure support structure according to a sixth invention for solving the above-described problems is
A lower ventilation path provided between the foundation steel and the floor surface;
The foundation bolt penetrates the lower ventilation path.

A structure support structure according to a seventh aspect of the present invention for solving the above problems is as follows.
The structure is
It is a silencer that silences the flow sound of the high-temperature fluid when the high-temperature fluid passes through the inside.

A gas turbine facility according to an eighth invention for solving the above-mentioned problems is
The silencer;
A gas turbine for discharging high-temperature exhaust gas is provided in the silencer.

  Therefore, according to the structure support structure and the gas turbine equipment according to the present invention, the heat of the structure is transmitted to the foundation bolt through the foundation steel material by providing the bolt base between the foundation bolt and the foundation steel material. In the heat transfer path, the heat transfer distance can be extended by the amount of the bolt pedestal interposed. Further, even if a heat insulating material is interposed between the bolt base and the base steel material, the fastening force (axial force) of the base bolt does not act directly and locally on the heat insulating material. Can be used without breaking. As a result, heat input from the structure to the floor can be suppressed.

(A) is a front view of the gas turbine equipment to which the structure support structure according to the present invention is applied, and (b) is a side view of the gas turbine equipment to which the structure support structure according to the present invention is applied. It is a section perspective view of the structure concerning Example 1 of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is the figure which showed the support structure which concerns on Example 1 of this invention. FIG. 4 is a cross-sectional view corresponding to FIG. 3. It is the figure which showed the support structure which concerns on Example 2 of this invention. It is the figure which showed the support structure which concerns on Example 3 of this invention. It is the figure which showed the support structure which concerns on Example 4 of this invention. It is a section perspective view of the structure concerning Example 5 of the present invention. It is XX arrow sectional drawing of FIG. FIG. 10 is a cross-sectional view taken along arrow XI-XI in FIG. 9. It is a section perspective view of the structure concerning Example 6 of the present invention. It is XIII-XIII arrow sectional drawing of FIG. It is XIV-XIV arrow sectional drawing of FIG.

  Hereinafter, the structure support structure according to the present invention will be described in detail with reference to the drawings. In addition, in embodiment shown below, the case where the support structure of the structure based on this invention is applied to the support structure of the silencer in gas turbine equipment is demonstrated. Moreover, about the member corresponding to the member shown in Example 1 in Examples 2-6, the code | symbol same as the code | symbol of the member shown in Example 1 is attached | subjected, and description is abbreviate | omitted.

  First, the support structure according to the first embodiment will be described with reference to FIGS. 1 to 4.

  As shown in FIGS. 1A and 1B, the gas turbine equipment 1 includes two gas turbines 11, a silencer (structure) 12, a connection duct 13, and a chimney 14, which have exhaust gas ( (High-temperature fluid) G is disposed in order from the upstream side to the downstream side in the flow direction. That is, the silencer 12, the connecting duct 13, and the chimney 14 are arranged in the vertical direction, and are arranged in order from the bottom to the top.

  Specifically, as shown in FIGS. 1 (a) and 1 (b), the two gas turbines 11 are arranged in parallel in the horizontal direction, and are generated by burning fuel supplied to the inside thereof. While the hot gas is used to drive a generator (not shown), the hot exhaust gas G generated by the combustion can be discharged from the rear end 11a. Note that the rear end 11 a is inserted into the silencer 12.

  A silencer 12 is disposed on the downstream side of the gas turbine 11 in the exhaust gas flow direction. The silencer 12 has a hollow structure with a bottom, and is fixed to a floor surface F that is an upper surface of concrete. A sound absorbing material (not shown) is affixed to the inner surface of the silencer 12. Thereby, the flow sound (exhaust sound) of the exhaust gas G flowing through the silencer 12 is canceled by the sound absorbing material.

  Further, a connection duct 13 is arranged on the downstream side of the silencer 12 in the exhaust gas flow direction (upper part of the silencer 12), and the downstream side of the connection duct 13 in the exhaust gas flow direction (of the connection duct 13). In the upper part), a chimney 14 having a cylindrical shape is arranged.

  Therefore, the high-temperature exhaust gas G discharged from the rear end 11 a of the gas turbine 11 is absorbed by the sound absorbing material in the process of passing through the silencer 12. Then, the exhaust gas G silenced by the silencer 12 is discharged from the chimney 14 into the atmosphere via the connection duct 13.

  Here, as shown in FIGS. 2 to 4, a bottom plate 12a is disposed at the lower part of the silencer 12. On the lower surface of the bottom plate 12a, a plurality of basic steel materials 20 are arranged on the outer periphery of the bottom plate 12a. It is provided along. These foundation steel materials 20 are connected so as to form a rectangular ring shape, and are fixed to the floor surface F using foundation bolts 50.

  The base steel material 20 is, for example, an H-shaped steel having a H-shaped cross section, which is placed horizontally, and includes an upper plate 21, a lower plate 22, and a vertical plate 23. That is, the upper plate 21 is connected to the bottom plate 12 a, and the lower plate 23 is fixed to the floor surface F by the foundation bolt 50. On the other hand, the vertical plate 12c connects the plate width direction center portion of the upper plate 21 and the plate width direction center portion of the lower plate 22 in the vertical direction. And between the lower board 22 and the floor surface F, the heat insulating material (2nd heat insulation means) 32 is interposed.

  Further, the fastening position of the foundation bolt 50 is outside the vertical plate 23 in the lower plate 22 in the plate width direction, and the upper plate 21 is disposed immediately above the fastening position. That is, the foundation bolt 50 fastened to the lower plate 22 is covered from directly above by the bottom plate 12a and the upper plate 21. When fastening the foundation bolt 50, the bolt base 41 and the heat insulating material (first heat insulating means) 31 are interposed between the foundation bolt 50 and the lower plate 23.

  Specifically, between the head 51 of the foundation bolt 50 and the lower plate 22, a bolt pedestal 41 and a heat insulating material 31 are interposed in order from the upper side to the lower side. Moreover, the shaft part (screw part) 52 of the foundation bolt 50 penetrates the pedestal 41, the heat insulating material 31, the lower plate 22, the heat insulating material 32, and the floor surface F in order from the upper side to the lower side. 41, the heat insulating material 31, the lower plate 22, and the through-hole formed in each of the heat insulating materials 32 are not in contact. That is, when the foundation steel material 20 is fixed to the floor surface F by the foundation bolt 50, the head 51 presses the upper surface of the bolt base 41 and the shaft portion 52 is screwed into the concrete.

  The bolt pedestal 41 includes a top plate 41a, a bottom plate 41b, and a plurality of (for example, four) connection plates 41c. The top plate 41a and the bottom plate 41b each have a rectangular flat plate shape, and the size (rectangular area) of the bottom plate 41b is larger (wider) than the size (rectangular area) of the top plate 41a. The head 51 of the foundation bolt 50 is in contact with the center of the top surface of the top plate 41a, and the shaft 52 of the foundation bolt 50 penetrates through the center of the top plate 41a and the center of the bottom plate 41b. ing.

  The connecting plate 41c connects the lower surface of the top plate 41a and the upper surface of the bottom plate 41b in the vertical direction without contacting the shaft portion 52 of the foundation bolt 50, and the corner portions of the top plate 41a and the bottom plate 41b. So as to extend outward in the bolt radial direction. That is, the connecting plate 41 c is arranged radially about the shaft portion 52 of the foundation bolt 50.

  Thereby, a plurality of ventilation paths 41 d are formed in the bolt base 41. That is, the plurality of ventilation paths 41d are formed by the top plate 41a, the bottom plate 41b, and the plurality of connection plates 41c, and are arranged radially about the shaft portion 52 of the foundation bolt 50. In this way, by forming the ventilation path 41d so that the outer peripheral portion of the bolt base 41 and the shaft portion 52 of the foundation bolt 50 communicate with each other, the cooling air A is introduced from the outside in the bolt radial direction within the bolt base 41. It can be made to flow inward and come into contact with the shaft portion 52 of the bolt 50.

  Therefore, by providing the bolt pedestal 41 between the head 51 of the foundation bolt 50 and the lower plate 22 of the foundation steel 20, the heat of the silencer 12 passes through the lower plate 22 of the foundation steel 20 and the head of the foundation bolt 20. In the heat transfer path transmitted to 51, the heat transfer distance can be extended by the amount of bolt base 41 interposed.

Even if the heat insulating material 31 is interposed between the bottom plate 41 b of the bolt base 41 and the lower plate 22 of the basic steel material 20, the fastening force (axial force, pressing force) of the basic bolt 50 is applied to the heat insulating material 31. Since it does not act directly and locally, the heat insulating material 31 can be used without being damaged. Thereby, in the heat transfer path mentioned above, the heat transfer from the silencer 12 can be suppressed as much as the heat insulating material 31 is interposed.

  Further, by forming a plurality of ventilation paths 41 d in the bolt base 41, the foundation bolt 50 serving as a heat transfer path from the silencer 12 to the floor surface F can be cooled.

  As a result, even if the heat of the silencer 12 held at a high temperature by the passage of the high-temperature exhaust gas G is transmitted to the basic steel material 20, heat input from the basic steel material 20 to the floor surface F can be suppressed.

  Next, a support structure according to Example 2 will be described with reference to FIGS. 5 and 6.

  As shown in FIG. 5 and FIG. 6, among the plurality of basic steel materials 20 connected in a rectangular ring shape, the four basic steel materials 20 positioned at the corners (composing the corners) have two extension plates (extension members). ) 24 are connected to each other. These extension plates 24 are connected to the lower plate 22 of the base steel material 20 located at the corners, and are disposed outside the silencer 12 and the base steel material 20. The extension plate 24 has the same thickness as the lower plate 22.

  The extension plate 24 is also fixed to the floor F using the bolt base 42 and the foundation bolt 50. The bolt pedestal 42 installed on the extension plate 24 has the same configuration and function as the bolt pedestal 41 installed on the lower plate 22 described above, and includes a top plate 42a, a bottom plate 42b, and a plurality of connecting plates. 42c and a plurality of ventilation holes 42d. At this time, the height of the bolt pedestal 42 is higher than the height of the bolt pedestal 41.

  That is, since the extension plate 24 is disposed outside the silencer 12 and the foundation steel material 20, the foundation bolt 50 fastened to the extension plate 24 is also more effective than the silencer 12 and the foundation steel material 20. Arranged outside. As a result, the bolt base 42 interposed between the head 51 of the foundation bolt 50 and the upper surface of the extension plate 24 is not covered from directly above by the bottom plate 12a and the upper plate 21, and a silencer is placed directly above the bolt base 42. 12 and the basic steel material 20 do not exist. Therefore, the height of the bolt pedestal 42 (the height of the connecting plate 42a) can be adjusted upward without limitation, and can be made higher than the height of the bolt pedestal 41 and the height of the foundation steel material 20. .

  As described above, when the height of the bolt pedestal 42 is increased, the opening area of the ventilation path 42d is increased accordingly, so that the inflow amount of the cooling air A can be increased. Thereby, since the coolability with respect to the foundation bolt 50 can be improved, the heat input from the foundation steel material 20 to the floor surface F can be suppressed. As shown in FIG. 6, when the foundation bolt 50 can be sufficiently cooled, the heat insulating material 31 may not be provided between the bolt base 42 and the extension plate 24.

  Next, a support structure according to Examples 3 and 4 will be described with reference to FIGS.

  As shown in FIG. 7, a cylindrical bolt base 43 is interposed between the head 51 of the foundation bolt 50 and the upper surface of the lower plate 22 (or the extension plate 24). That is, the base bolt 50 penetrates through the center of the bolt base 43.

  A ventilation passage 43 a is formed in the central portion of the bolt pedestal 43 so as to be coaxial with the shaft portion 52 of the foundation bolt 50 that penetrates the bolt pedestal 43. Thereby, the shaft part 52 of the base bolt 50 which penetrates is accommodated in the ventilation path 43a, without contacting the ventilation path 43a.

  Further, the ventilation passage 43a is formed with an intake hole 43b and an exhaust hole 43c so as to extend outward in the bolt radial direction. The intake hole 43b communicates between the outer peripheral surface of the bolt pedestal 43 and the ventilation path 43a, and the cooling air A taken from the outside of the bolt pedestal 43 can be supplied into the ventilation path 43a. On the other hand, the exhaust hole 43 c communicates between the ventilation path 43 a and the outer peripheral surface of the bolt pedestal 43 so that the cooling air A in the ventilation path 43 a can be discharged toward the outside of the bolt pedestal 43. It has become.

  Therefore, since the head 51 and the shaft 52 of the foundation bolt 50 can be cooled by the cooling air A flowing in the ventilation path 43a, heat input from the foundation steel 20 to the floor surface F can be suppressed. . As shown in FIG. 7, when the foundation bolt 50 can be sufficiently cooled, the heat insulating material 31 may not be provided between the bolt base 43 and the lower plate 22.

  Further, as shown in FIG. 8, a cylindrical bolt base 44 is interposed between the head 51 of the foundation bolt 50 and the upper surface of the lower plate 22 (or the extension plate 24). That is, the base bolt 50 penetrates through the center of the bolt base 44.

  And the ventilation path 44a is integrally formed in the volt | bolt base 44, the lower board 22, the heat insulating material 32, and the floor surface F continuously. At this time, the air passage 44 a passes through the center of the bolt pedestal 44 and passes through the bolt pedestal 44, the lower plate 22, and the heat insulating material 32 without being in contact therewith. As a result, the shaft portion 52 of the base bolt 50 that passes therethrough is accommodated in the ventilation path 44a without contacting the ventilation path 44a.

  Further, the air passage 44a is formed with an intake hole 44b and an exhaust hole 44c so as to extend outward in the bolt radial direction. The intake hole 44b allows communication between the outer peripheral surface of the bolt pedestal 44 and the ventilation path 44a, and cooling air A taken from the outside of the bolt pedestal 44 can be supplied into the ventilation path 44a. On the other hand, the exhaust hole 44 c communicates between the ventilation path 44 a and the exhaust passage in the concrete, and the cooling air A in the ventilation path 44 a can be discharged toward the outside of the bolt base 43. ing.

  Therefore, since the head 51 and the shaft 52 of the foundation bolt 50 can be cooled by the cooling air A flowing in the ventilation path 44a, heat input from the foundation steel 20 to the floor surface F can be suppressed. . As shown in FIG. 8, when the foundation bolt 50 can be sufficiently cooled, the heat insulating material 31 may not be provided between the bolt base 44 and the lower plate 22.

  Next, support structures according to Embodiments 5 and 6 will be described with reference to FIGS.

  As shown in FIGS. 9 to 11, a plurality of ventilation members 61 having a hollow shape are provided in the lower portion of the basic steel material 20. These ventilation members 61 are interposed between the lower surface of the lower plate 22 and the floor surface F, and are arranged corresponding to the fastening positions of the foundation bolts 50. A pressing member 62 is provided on the outer peripheral portion of the ventilation member 61. The pressing member 62 is fixed to the floor surface F by fixing bolts 63 and is used for positioning the ventilation member 61.

  Here, a ventilation path 61 a is formed in the ventilation member 61, and the intake hole 61 b and the exhaust hole 61 c of the ventilation path 61 a are respectively formed on the side walls facing each other in the longitudinal direction of the basic steel material 20 in the ventilation member 61. It is open. Thereby, the ventilation path 61a can discharge | emit the cooling air A taken in from the inlet hole 61b toward the exhaust hole 61c. Moreover, the passage width of the ventilation path 61a is formed to be longer than the plate width of the basic steel material 20 (the plate width of the upper plate 21 and the lower plate 22).

  A bolt pedestal 41 (or bolt pedestals 43 and 44) is interposed between the head 51 of the foundation bolt 50 and the lower plate 22 of the foundation steel material 20, and the foundation bolt 50 includes the bolt pedestal 41, The lower plate 22, the ventilation member 61, and the floor surface F are vertically penetrated. That is, the shaft part 52 of the foundation bolt 50 penetrates the ventilation path 61a in the vertical direction.

  Therefore, since the shaft 52 of the foundation bolt 50 and the lower plate 22 of the foundation steel material 20 can be cooled by the cooling air A flowing in the ventilation path 61a, the heat input from the foundation steel material 20 to the floor surface F is suppressed. can do. As shown in FIG. 10, when the foundation bolt 50 can be sufficiently cooled, the heat insulating material 31 may not be provided between the bolt base 41 and the lower plate 22.

  As shown in FIGS. 12 to 14, a hollow ventilation member 71 having a hollow shape is provided in the lower portion of the basic steel material 20. The ventilation member 71 is connected in a rectangular ring shape and is interposed between the lower surface of the lower plate 22 and the floor surface F in the plurality of foundation steel materials 20, and the fastening positions of all the foundation steel materials 20 and all the foundation bolts 50 are arranged. It is arranged to include. A pressing member 72 is provided on the outer peripheral portion of the ventilation member 71. The pressing member 72 is fixed to the floor surface F by fixing bolts 73 and is used for positioning the ventilation member 71.

  Here, a ventilation path 71 a is formed in the ventilation member 71, and an intake hole 71 b and an exhaust hole 71 c of the ventilation path 71 a are respectively opened on opposing side walls of the ventilation member 71. Thereby, the ventilation path 71a can discharge | emit the cooling air A taken in from the inlet hole 71b toward the exhaust hole 71c.

  A bolt pedestal 41 (or bolt pedestals 43 and 44) is interposed between the head 51 of the foundation bolt 50 and the lower surface 22 of the foundation steel material 20. The plate 22, the ventilation member 71, and the floor surface F are vertically penetrated. That is, the shaft portion 52 of the foundation bolt 50 penetrates the ventilation path 71a in the vertical direction.

  Accordingly, since the shaft portion 52 of the foundation bolt 50 and the lower plate 22 of the foundation steel material 20 can be cooled by the cooling air A flowing in the ventilation path 71a, heat input from the foundation steel material 20 to the floor surface F is suppressed. can do. As shown in FIG. 13, when the foundation bolt 50 can be sufficiently cooled, the heat insulating material 31 may not be provided between the bolt base 41 and the lower plate 22.

DESCRIPTION OF SYMBOLS 1 Gas turbine equipment 11 Gas turbine 12 Silencer 13 Connection duct 14 Chimney 20 Base steel material 21 Upper plate 22 Lower plate 23 Vertical plate 24 Extension plates 31, 32 Heat insulating materials 41-44 Bolt bases 41d, 42d, 43a, 44a Ventilation path 50 Foundation bolt 51 Head 52 Shaft 61, 71 Ventilation members 61a, 71a Ventilation path A Cooling air F Floor G Exhaust gas

Claims (8)

A structure support structure for fixing a base steel material provided at a lower part of the structure to a floor surface by a foundation bolt,
A bolt pedestal provided between the head of the foundation bolt and the foundation steel material and pressed against the floor surface by the head of the foundation bolt penetrating through the inside,
A structure support structure comprising: a heat insulating material provided between the bolt base and the base steel material. The structure support structure according to claim 1,
An extension member connected to the foundation steel material and disposed outside the structure and the foundation steel material;
Between the head of the foundation bolt and the extension member, the bolt pedestal that is pressed to the floor side by the head of the foundation bolt penetrating through the inside is interposed,
The structure according to claim 1, wherein a height of the bolt pedestal installed on the extension member is higher than a height of the bolt pedestal installed on the basic steel material. The structure support structure according to claim 1 or 2,
The bolt base is
A support structure for a structure, comprising: a pedestal air passage that communicates between an outer peripheral portion of the bolt pedestal and a shaft portion of the foundation bolt that passes through the bolt pedestal. In the structure support structure according to claim 3,
The pedestal ventilation path is formed radially with the foundation bolt as a center. In the structure support structure according to claim 3,
The pedestal ventilation path is formed coaxially with the foundation bolt. The structure support structure according to any one of claims 1 to 5,
A lower ventilation path provided between the foundation steel and the floor surface;
The foundation bolt penetrates the lower ventilation path. The structure support structure according to any one of claims 1 to 6,
The structure is
A structure supporting structure, wherein the structure is a silencer that silences a flowing sound of the high-temperature fluid when the high-temperature fluid passes through the inside. The muffler of claim 7;
A gas turbine facility comprising: a gas turbine that discharges high-temperature exhaust gas in the silencer.

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