JP2006342618A - Horizontal support structure of vertical base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exhibit the predetermined vertical base isolation function by surely deforming a disc spring element in the vertical direction, and by preventing horizontal dislocation of a disc spring group of a disc spring base isolation element of a vertical base isolation device. <P>SOLUTION: An inner peripheral intermediate washer 22 composed of a washer part 23 interposed between inner peripheral parts of the disc spring groups 18 and 18 and a back board part 24 integrally formed with this washer part 23 and oppositely arranged at a predetermined interval to an inner peripheral surface of the disc spring groups 18 and 18, and an outer peripheral intermediate washer 25 composed of a washer part 26 interposed between outer peripheral parts of the disc spring groups 18 and 18 and a back board part 27 integrally formed with this washer part 26 and oppositely arranged at a predetermined interval with an outer peripheral surface of the disc spring groups 18 and 18, are respectively interposed between the adjacent disc spring groups 18 and 18 of the disc spring base isolation element 17 of the vertical base isolation device 16. The height of any one back board parts 24 and 27 of the inner peripheral intermediate washer 22 or the outer peripheral intermediate washer 25 is set in the height corresponding to the total plate thickness of the disc spring group 18, and the height of any other back board parts 27 and 24 is set in the height corresponding to one sheet of a disc spring 19 of the disc spring group 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a horizontal support structure for a vertical seismic isolation device, and more particularly to a horizontal support structure for a vertical seismic isolation device including a disc spring seismic isolation element.

 The fast breeder reactor (FBR), which is a high-temperature structure, needs to greatly reduce the seismic force. Therefore, a horizontal seismic isolation device is interposed between the building and the foundation, and the entire building is seismically isolated. A seismic isolation device is installed between the common floor where the important facilities such as the reactor vessel and intermediate heat exchanger are installed and the building, and the reactor vessel and intermediate heat exchanger are important through the common floor. The equipment is isolated from the top and bottom.

An example of a seismic isolation structure employed in such a fast breeder reactor is described in Patent Document 1. In other words, this seismic isolation structure is concentric around the reactor vessel, intermediate heat exchanger, etc. on the common floor where important facilities such as the reactor vessel, intermediate heat exchanger, etc. are mounted. The disc springs are laminated, the upper ends of the disc springs are fixed to the common floor, and the lower ends are fixed or installed on the concrete wall of the building facing the lower side of the common floor.
Japanese Patent No. 2978732

  By the way, in the seismic isolation structure having the above-described structure, since a disc spring is laminated around important facilities such as a reactor vessel and an intermediate heat exchanger, A spring is required, and maintenance such as the production, installation, and removal of a disc spring is very troublesome, and the equipment cost and the maintenance cost are high.

  On the other hand, in order to cope with the above problems, a small disc spring that is easy to manufacture is used, and a plurality of disc springs are stacked in the same direction to form one unit, and the disc spring groups of the one unit are alternately oriented. Thus, there has been proposed a seismic isolation structure in which a plurality of stages are combined to constitute a disc spring element and the disc spring element is used as a seismic isolation element.

  In the seismic isolation structure having such a configuration, since a small disc spring is used, the equipment cost and the maintenance cost can be reduced, but in order to ensure a predetermined vertical deformation stroke, The disc springs must be arranged in multiple stages. For this reason, it is necessary to take measures to ensure that load transmission in the vertical direction can be smoothly performed even if some horizontal slip occurs in the part (seat surface) where the disc spring groups are alternately combined. An intermediate washer is disposed on each of the inner peripheral side and the outer peripheral side.

  Originally, a disc spring seismic isolation element exhibits vertical seismic isolation performance by its own expansion and contraction. In addition, the long-term load from the common floor is supported in a contracted (deformed) state. Furthermore, when the disc spring seismic isolation element is repeatedly deformed in the vertical direction, a side slip occurs between the surfaces of the disc spring group stacked in the same direction, the side slip accumulates for the number of steps, and the entire element becomes a bowed state. There is a tendency to protrude outward. This tendency appears instantaneously when the disc spring is deformed depending on the mounting state of the disc spring seismic isolation element.

  Since the disc spring seismic isolation elements are just stacked, there is nothing that resists or restrains the horizontal load or deformation, and the above-mentioned intermediate washer of the seismic isolation structure also prevents horizontal deformation of the disc spring. Does not have a function to suppress. For this reason, there is a risk that the disc spring will come into contact with the surrounding common floor or the like due to the horizontal deformation, thereby hindering the vertical seismic isolation performance.

  Further, the horizontal seismic force acts about 30% of the supporting load with respect to the load (including the common floor) supported by the disc spring seismic isolation element. Since the disc spring seismic isolation element cannot bear a horizontal load as described above, a separate horizontal support structure is required. The horizontal support structure is installed in a part that is not affected by the thermal expansion deformation of the common floor as much as possible. However, when there is a gap in the mounting state of the horizontal support part, the horizontal response is amplified and the horizontal seismic isolation The response reduction effect due to is reduced.

  In addition, when the common floor supports a container having a heat source, such as nuclear power, the common floor is subject to excessive thermal expansion deformation due to the temperature of the container (radiant heat, heat generated by radiant heat, etc.) and warping of the entire common floor. An unexpected load may act on the seismic isolation device and the horizontal support, and the seismic isolation function of the vertical seismic isolation device may be hindered. For this reason, it is necessary to suppress thermal expansion deformation of the common floor by some method.

  The present invention has been made in view of the above-described conventional problems, and is easy to manufacture, attach, remove, etc., and can reduce equipment costs and maintenance costs at a low cost. The specified vertical seismic isolation performance can be reliably obtained, and even if the common floor on which the seismic isolation object is mounted is thermally expanded and deformed due to a temperature rise, the predetermined level is not affected. It is an object of the present invention to provide a horizontal support structure for a vertical seismic isolation device that can reliably obtain vertical seismic isolation performance.

In order to solve the above problems, the present invention employs the following means.
In other words, the invention according to claim 1 is provided in the interior of a building that is horizontally isolated by a horizontal seismic isolation device, and is a horizontal of a vertical seismic isolation device that vertically isolates a common floor on which a plurality of seismic isolation objects are mounted. The upper and lower seismic isolation device is a support structure in which a plurality of disc springs are stacked in the same direction as one unit, and a plurality of disc spring groups of one unit are combined in a plurality of stages so that the directions are staggered. And a washer portion interposed between the disc spring groups adjacent to each other in the vertical direction of the disc spring isolation element, between the inner peripheral portions of the adjacent disc spring groups, and the washer An inner peripheral washer that is integrally formed with the inner peripheral surface and is disposed opposite to the inner peripheral surface of the adjacent disc spring group at a predetermined interval, and the outer periphery of the adjacent disc spring group A washer part interposed between the parts, and formed integrally with the washer part, An outer peripheral intermediate washer comprising an outer peripheral surface of an adjacent disc spring group and a back plate portion disposed opposite to each other at a predetermined interval is interposed, and either the inner peripheral intermediate washer or the outer peripheral intermediate washer The height of the plate portion is set to a height corresponding to the total plate thickness of the disc spring group, and the height of any other back plate portion is set to the height of one disc spring of the disc spring group. Features.

  According to the horizontal support structure of the vertical seismic isolation device according to the present invention, the inner peripheral intermediate washer or the outer peripheral intermediate washer is interposed between the disk spring groups adjacent to each other in the vertical direction of the disc spring isolation element. The height of one back plate of the intermediate washer is set to a height corresponding to the total plate thickness of the disc spring group, and the height of one of the other back plates is set to one disc spring of the disc spring group. Therefore, each disc spring group of the disc spring seismic isolation element can be prevented from laterally shifting, and each disc spring group of each disc spring group comes into contact with the common floor etc. Etc. can be prevented. Further, the disc springs of each disc spring group are not restrained from being displaced by the inner and outer peripheral washers, and the disc springs can be sufficiently displaced. Accordingly, each disc spring of each disc spring group can be sufficiently displaced, so that predetermined vertical seismic isolation performance can be reliably obtained.

  The invention according to claim 2 is the horizontal support structure for the vertical seismic isolation device according to claim 1, wherein the common floor is supported to be displaceable in the vertical direction and displaceable in the direction of thermal expansion in the horizontal direction. A horizontal support mechanism is provided.

  According to the horizontal support structure of the vertical seismic isolation device according to the present invention, the horizontal support mechanism is provided that supports the common floor so that the common floor can be displaced in the vertical direction and can be displaced in the direction of thermal expansion in the horizontal direction. Since the thermal expansion deformation is inhibited, an unexpected load is not applied to the vertical seismic isolation device, and a predetermined vertical seismic isolation performance by the vertical seismic isolation device is surely obtained.

  The invention according to claim 3 is the horizontal support structure of the vertical seismic isolation device according to claim 2, wherein the horizontal support mechanism is provided between the common floor and the building, It is a rolling member that is displaceable in the vertical direction and is supported so as to be displaceable in the direction of thermal expansion in the horizontal direction.

  According to the horizontal support structure of the vertical seismic isolation device according to the present invention, the common floor can be displaced in the vertical direction by a horizontal support mechanism including a rolling member provided between the common floor and the building, and the horizontal thermal expansion. It is supported so as to be displaceable in the direction of movement. Therefore, an unexpected load does not act on the vertical seismic isolation device by restraining the thermal expansion deformation of the common floor, and the predetermined vertical seismic isolation performance by the vertical seismic isolation device can be reliably obtained. Become.

  The invention according to claim 4 is the horizontal support structure for the vertical seismic isolation device according to any one of claims 1 to 3, wherein piping for circulating a cooling medium is laid on the common floor. It is characterized by.

  According to the horizontal support structure of the vertical seismic isolation device according to the present invention, the common floor is cooled by the cooling medium flowing in the pipe. Therefore, even if the seismic isolation object mounted on the common floor has a high-temperature structure, the common floor will not be excessively thermally expanded and deformed, and the specified vertical seismic isolation performance is ensured by the vertical seismic isolation device. Will be obtained.

As described above, according to the seismic isolation structure of the present invention, the inner peripheral intermediate washer and the outer peripheral intermediate washer are interposed between the disc spring groups adjacent in the vertical direction of the disc spring isolation element of the vertical seismic isolation device. The height of the back plate part of either the inner peripheral intermediate washer or the outer peripheral intermediate washer is set to a height corresponding to the total plate thickness of the disc spring group, and the height of one of the other back plate parts is set to the disc spring Since the height corresponding to one disc spring of the group is set, horizontal lateral displacement between the disc springs of the disc spring group and accumulation of deformation thereof can be prevented. Therefore, it is possible to prevent the whole of the disc spring isolation elements stacked in multiple stages from protruding in the horizontal direction, so that each disc spring of each disc spring group does not come into contact with the common floor etc. The vertical seismic isolation function is surely obtained.
In addition, since the height of one of the other back plates is set to a height corresponding to one disc spring of the disc spring group, the disc spring seismic isolation element moves up and down while receiving a horizontal load due to an earthquake or the like. When deforming in the direction, the disc spring group is not sandwiched between the inner peripheral side and the outer peripheral back plate, and a predetermined vertical seismic isolation performance can be reliably obtained.
Furthermore, by setting the back plate of the inner peripheral washer higher than that of the outer intermediate washer, the disc spring can be viewed from the outside, so that maintenance can be facilitated.

 Moreover, since the common floor is supported by the horizontal support mechanism so that it can be displaced in the vertical direction and in the direction of thermal expansion in the horizontal direction, it absorbs horizontal deformation accompanying thermal expansion deformation of the common floor, And the displacement of the up-down direction at the time of an earthquake can be made smooth. Therefore, the predetermined vertical seismic isolation performance by the vertical seismic isolation device can be reliably obtained.

 Furthermore, since the common floor can be cooled by a cooling medium circulating in the pipe, even if the seismic isolation object mounted on the common floor is a high-temperature nuclear reactor, an intermediate heat exchanger, etc. The thermal expansion of the common floor due to the temperature rise can be suppressed within a predetermined range. Therefore, the predetermined vertical seismic isolation performance by the vertical seismic isolation device can be reliably obtained.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
1 to 9 show an embodiment of a horizontal support structure for a vertical seismic isolation device according to the present invention. FIG. 1 is a schematic view showing the whole, FIG. 2 is a partially enlarged plan view of FIG. 3 is a longitudinal sectional view of the vertical seismic isolation device of FIG. 1, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an explanatory diagram showing how to install and remove the vertical seismic isolation device, and FIG. FIG. 7 is an explanatory view showing a state in which a disc spring seismic isolation element is attached, FIG. 8 is a plan view of a steel damper, and FIG. 9 is a front view of FIG.

  That is, the horizontal support structure for the vertical seismic isolation device is applied to a fast breeder reactor. The fast breeder reactor is constructed by a building 1 that is horizontally isolated by a plurality of horizontal seismic isolation devices 2 and a plurality of vertical seismic isolation devices 16 that are arranged inside the building 1 and interposed between the buildings 1. The seismic isolation object 9 that is an important device such as the reactor vessel 3 and the intermediate heat exchanger 4 is mounted on the common floor 11.

  As shown in FIG. 1, the building 1 is installed on the upper part of a concrete base 10 via a plurality of horizontal seismic isolation devices 2, and the entire building 1 is horizontally isolated by the horizontal seismic isolation device 2. The horizontal seismic isolation device 2 is not particularly limited, and various known horizontal seismic isolation devices 1 can be used.

  As shown in FIGS. 1 and 2, the common floor 11 has a substantially rectangular plate shape that is horizontally installed in a space surrounded by a concrete wall 7 and has a nuclear reactor in the center. A vessel 3 is mounted, intermediate heat exchangers 4 and 4 are mounted on both sides thereof, and primary piping 5 is laid between the reactor vessel 3 and each intermediate heat exchanger 4, and each intermediate heat exchanger 4, secondary system crossover pipes 6 are respectively laid.

  Between the common floor 11 and the base 8 integrated with the building 1 opposed to the lower side, vertical seismic isolation devices 16 are interposed at a plurality of locations. The reactor vessel 3 and each intermediate heat exchanger 4 are isolated from each other vertically. In the present embodiment, the vertical seismic isolation devices 16 are interposed in 12 locations around the reactor vessel 3 and 4 locations around each intermediate heat exchanger 4.

  As shown in FIGS. 3 to 7, each vertical seismic isolation device 16 is arranged by being incorporated in a disc spring seismic isolation element 17 configured by combining a plurality of disc springs 19 and a disc spring seismic isolation element 17. A damper 31 is provided, and the reactor vessel 3 and the intermediate heat exchangers 4 are vertically isolated via the common floor 11 by the cooperation of the disc spring isolation element 17 and the damper 31.

  As shown in FIGS. 6 and 7, the disc spring seismic isolation element 17 is configured as one unit with a plurality of disc springs 19 stacked in the same direction, and the disc spring groups 18 of one unit are alternately oriented. In this way, a plurality of stages are combined. In the present embodiment, five disc springs 19 are overlapped to form one unit, and the disc spring seismic isolation element 17 is configured by combining the one unit of disc spring groups 18 in 14 stages.

  As shown in FIG. 3, the disc spring seismic isolation element 17 is interposed between the common floor 11 and the base 8 through a through hole 12 that penetrates the common floor 11 in the vertical direction. In this case, the through-hole 12 of the common floor 11 has three stages of a large-diameter portion 13, a medium-diameter portion 14 having a smaller diameter than the large-diameter portion 13, and a small-diameter portion 15 having a smaller diameter than the medium-diameter portion 14. A disc spring seismic isolation element 17 is formed between the disc-shaped upper flange 20 fixed to the bottom of the medium diameter portion 14 and the disc-shaped lower flange 21 fixed to the upper portion of the base 8 in the vertical direction. It is arranged to be displaceable.

  An inner peripheral intermediate washer 22 and an outer peripheral intermediate washer 25 are respectively interposed between the disk spring groups 18 and 18 adjacent to the disc spring seismic isolation element 17 in the vertical direction. Thus, even if a lateral displacement occurs between the disc spring groups 18 in the horizontal direction, load transmission in the vertical direction can be reliably performed.

 As shown in FIG. 14, each inner peripheral intermediate washer 22 includes an annular washer portion 23 interposed between inner peripheral portions of the disc spring groups 18, 18 adjacent in the vertical direction, and an inner peripheral edge portion of the washer portion 23. And a cylindrical back plate portion 24 which is disposed opposite to the inner peripheral surface of the disc spring groups 18 and 18 adjacent to each other in the vertical direction at a predetermined interval.

 As shown in FIG. 15, each outer peripheral intermediate washer 25 is integrated with an annular washer portion 26 interposed between outer peripheral portions of the disc spring groups 18, 18 adjacent in the vertical direction, and an outer peripheral edge portion of the washer portion 26. And a cylindrical back plate portion 27 disposed opposite to the outer peripheral surfaces of the disc spring groups 18 and 18 adjacent to each other in the vertical direction at a predetermined interval.

 The height of the back plate portion 24 of each inner peripheral washer 22 is set higher than the height of the inner peripheral surfaces of the two disc spring groups 18, 18 adjacent in the vertical direction, and the back plate portion 27 of each outer intermediate washer 25. Is set to be lower than the height of the outer peripheral surfaces of the two disc spring groups 18, 18 adjacent in the vertical direction. Thus, by setting the height of the back plate portion 24 of each inner peripheral intermediate washer 22 and the back plate portion 27 of each outer peripheral intermediate washer 25, the horizontal of each disc spring 19 constituting the disc spring seismic isolation element 17 is set. Lateral displacement in the direction can be prevented, and it is possible to prevent each disc spring 19 from coming into contact with the common floor 11 and the like and causing galling. In the present embodiment, the height of the back plate portion 24 of the inner peripheral intermediate washer 22 is set to a height corresponding to the total plate thickness of the disc spring groups 18, 18, and the back plate portion of the outer peripheral intermediate washer 25 is set. The height of 27 is set to a height corresponding to the thickness of one of the disc springs 19 of the disc spring groups 18 and 18.

 A flat washer 28 is interposed between the upper end of the disc spring isolation element 17 and the upper flange 20, or between the lower end of the disc spring isolation element 17 and the lower flange 21, respectively. Horizontal deformation occurring in the disc spring isolation element 17 can be concentrated between the disc spring 19 at the upper end of the seismic isolation element 17 and the upper flange 20 and between the disc spring 19 at the lower end and the lower flange 21.

  A solid lubricant 29 is applied to the surface of each disc spring 19 of the disc spring seismic isolation element 17 with a predetermined thickness. The solid lubricant 29 smoothes the deformation of each disc spring 19, and adjacent disc springs 19, 19. It is prevented that galling occurs between them. Examples of the solid lubricant 29 include molybdenum disulfide-based solid lubricant 29.

  A cylindrical guide 30 is erected vertically at the center of the disc spring isolation element 17, and the guide 30 prevents lateral displacement of each disc spring group 18 of the disc spring isolation element 17 in the horizontal direction. Note that the guide 30 need not be provided if only the outer peripheral intermediate washer 25 and the inner peripheral intermediate washer 22 can prevent the disc spring group 18 of the disc spring seismic isolation element 17 from horizontally shifting in the horizontal direction.

  As shown in FIG. 5, the disc spring seismic isolation element 17 has an upper flange 20 and a lower flange 21 arranged at the upper and lower ends, a guide 30 and a load transmission rod 33 which will be described later are arranged at the center, and in this state from above. The common floor 11 and the base 8 are inserted into the through hole 12 of the common floor 11, the lower flange 21 is fixed to the upper part of the base 8, and the upper flange 20 is fixed to the bottom of the medium diameter part 14 of the through hole 12. It is inserted between. Therefore, maintenance such as attachment and removal of the disc spring seismic isolation element 17 becomes easy.

  As shown in FIGS. 3 and 4, the damper 31 includes three steel dampers 32, 32, 32 that are radially attached to the bottom of the large-diameter portion 13 of the common floor 11, and three steel members that receive loads from the base 8 side. It comprises a load transmission rod 33 to be transmitted to the dampers 32, 32, 32. When an earthquake occurs, the load from the base 8 side is transmitted to each steel material damper 32 via the load transmission rod 33, and each steel material damper 32 is Seismic force is attenuated by plastic deformation.

  The load transmission rod 33 is inserted into the inner portion of the guide 30 at the center of the disc spring seismic isolation element 17, and the lower end is rotatably supported on the upper portion of the lower flange 21 via the ball seat 34. . The upper end portion of the load transmitting rod 33 passes through the center portion of the upper flange 20 and protrudes above the upper flange 20, and a ball seat 34 is rotatably attached to the protruding upper end portion.

 The three steel dampers 32, 32, 32 are arranged radially at the bottom of the large-diameter portion 13 of the through hole 12 around the load transmission rod 33, and one end of each steel damper 32 is an upper end of the load transmission rod 33. The ball seat 34 is pin-coupled 35, and the other end is fixed to the bottom of the large-diameter portion 13 with a bolt.

  Each steel material damper 32 is a cantilever type steel material damper 32, and as shown in FIG. 8 and FIG. 9, when the seismic force is input, the steel material damper 32 is formed in a cross-sectional shape that gradually increases in thickness from one end to the other end. In addition, the cross-sectional shape is adjusted so that the stress distribution is uniform over the entire length.

  As shown in FIG. 10, the damper 31 may be configured by providing a known lead extrusion damper 36 at the center of the disc spring seismic isolation element 17. In this case, the lower end portion of the lead extrusion damper 36 is rotatably connected to the upper portion of the lower flange 21 via the ball seat 34, and the ball seat 34 is rotatably attached to the upper end portion of the lead extrusion damper 36. What is necessary is just to connect between the seat 35 and the upper flange 20 via the pin 37. Since the lead push damper 36 has a simple structure, maintenance such as attachment and removal becomes easy.

  As shown in FIGS. 2 and 11 to 13, the common floor 11 is supported horizontally inside the building 1 by the horizontal support mechanism 40, and allows thermal expansion deformation in a direction perpendicular to the horizontal support direction. In the event of the occurrence of earthquakes, it is possible to reliably support the horizontal direction by the seismic force and to move vertically.

  As shown in FIG. 2, the horizontal support mechanism 40 is a rectangular support groove 41 that penetrates in the vertical direction and is provided at the center of both sides in the length direction of the common floor 11 and the center of both sides in the width direction. A rectangular support hole 42 penetrating in the vertical direction provided at four locations on the periphery of the portion of the common floor 11 where the reactor vessel 3 is mounted, and the wall 7 of the building 1 corresponding to each support groove 41 A key 43 having a rectangular cross section that is provided in a state of projecting in a horizontal direction in each support groove 41 and vertically installed on a portion of the base 8 of the building 1 corresponding to each support hole 42. Further, a column 44 having a rectangular section loosely fitted in each support hole 42, a rolling member 45 interposed between both side surfaces of each key 43 and both side surfaces of each support groove 41, and each support Rolling members 46 interposed between the respective surfaces of the holes 42 and the respective surfaces of the support columns 44 are provided. To have.

  In this case, the common floor 11 is allowed to be displaced in the vertical direction between both side surfaces of the support grooves 41 on both side surfaces in the width direction and both side surfaces of the keys 43 loosely fitted in the support grooves 41. The rolling member (biaxial roller) 45 that allows displacement in one horizontal direction (vertical direction in FIG. 2) and prevents displacement in the other horizontal direction (left and right direction in FIG. 2) is a gap. An adjustment mechanism 47 is interposed.

 Further, the vertical displacement of the common floor 11 is allowed between both side surfaces of each support groove 41 on both side surfaces in the length direction and both side surfaces of each key 43 loosely fitted in the support groove 41. The rolling member (biaxial roller) 45 that allows displacement in one horizontal direction (left-right direction in FIG. 2) and prevents displacement in the other horizontal direction (up-down direction in FIG. 2) is a gap. An adjustment mechanism 47 is interposed.

 Further, between each surface of each support hole 42 and each surface of each column 44 that is loosely fitted in each support hole 42, a rolling member (single-axis roller) that allows the common floor 11 to be displaced in the vertical direction. ) 46 is interposed via a gap adjusting mechanism 47.

  The bottom surface of each support groove 41 on both side surfaces in the longitudinal direction and the support groove between the bottom surface of each support groove 41 on both side surfaces in the width direction and the tip surface of the key 43 loosely fitted in the support groove 41. Predetermined gaps are provided between the front end surfaces of the keys 43 that are loosely fitted in the 41.

  Each gap adjusting mechanism 47 includes a U-shaped guide 48, a pair of wedges 49 and 49 supported by the guide 48, and an adjustment screw 40 that adjusts the relative position of the wedges 49 and 49 with respect to the guide 48. The wedges 49, 49 are fixed in the support groove 41, the key 43, the support hole 42, or the column 44 through the guide 48, and the wedges 49, 49 are adjusted in the horizontal direction by adjusting the engagement positions of the wedges 49, 49 with the adjusting screw 50. And the gap between the wedges 49, 49 and the rolling member (biaxial roller) 45 or the rolling member (uniaxial roller) 46 is adjusted, and the rolling member (biaxial roller) 45 and A backlash (gap) is prevented from occurring in the rolling member (single-axis roller) 46.

  As shown in FIG. 3, cooling pipes 51 are embedded in a plurality of places on the common floor 11, and the common floor 11 is cooled by circulating various cooling media in the cooling pipes 51.

  In the horizontal support structure of the vertical seismic isolation device according to the present embodiment configured as described above, the common floor on which the seismic isolation object 9 of important equipment such as the reactor vessel 3 and the intermediate heat exchanger 4 is mounted. 11 and the base 8 are provided with vertical seismic isolation devices 16, and these vertical seismic isolation devices 16 provide seismic isolation targets such as the reactor vessel 3 and the intermediate heat exchanger 4 through the common floor 11. Since the object 9 is configured to be subjected to the vertical isolation, the individual vertical isolation device 16 can be reduced in size. Accordingly, the vertical seismic isolation device 16 can be easily manufactured, attached, and detached, and the equipment cost and maintenance cost can be reduced.

  In addition, with the cooperation of the horizontal seismic isolation device 2 that seismically isolates the entire building 1 and the vertical seismic isolation device 16 that seismically isolates the common floor 11, seismic isolation of the reactor vessel 3, the intermediate heat exchanger 4, etc. Since the object 9 can be subjected to three-dimensional seismic isolation, it is only necessary to provide the common floor 11 with a mounting portion for the vertical seismic isolation device 16, and the structure of the common floor 11 can be simplified.

  Further, the vertical seismic isolation device 16 is constituted by the disc spring seismic isolation element 17 and the damper 31, and is interposed between the common floor 11 and the base 8 in a state where the damper 31 is incorporated in the disc spring seismic isolation element 17. Therefore, the space for the portion where the vertical seismic isolation device 16 is interposed can be small, and maintenance such as attachment and removal becomes easy.

 Further, an inner peripheral intermediate washer 22 and an outer peripheral intermediate washer 25 are interposed between the disk spring groups 18, 18 adjacent to each other in the vertical direction of the disc spring seismic isolation element 17, and the back plate portion 24 of the inner peripheral intermediate washer 22. Are opposed to the inner peripheral surfaces of the disc spring groups 18, 18, and the back plate portion 27 of the outer peripheral intermediate washer 25 is arranged to oppose the outer peripheral surfaces of the disc spring groups 18, 18, so that each disc spring group 18 and each The horizontal displacement of the disc spring 19 in the horizontal direction can be prevented, the disc spring 19 can be prevented from coming into contact with the common floor 11 and the like, and galling can be prevented, and a predetermined vertical seismic isolation function can be reliably obtained.

 Furthermore, the common floor 11 on which the seismic isolation object 9 such as the reactor vessel 3 and the intermediate heat exchanger 4 is mounted is supported horizontally by the horizontal support mechanism 40 and allows thermal expansion deformation in two horizontal directions. When the seismic force is input, it is possible to achieve reliable horizontal support and to displace the common floor sufficiently in the vertical direction. Therefore, a predetermined vertical seismic isolation performance can be reliably obtained.

  In the above description, the height of the back plate portion 24 of the inner peripheral intermediate washer 22 is set to a height corresponding to the total plate thickness of the disc spring groups 18, 18, and the back plate portion 27 of the outer peripheral intermediate washer 25 is set. Is set to a height corresponding to the thickness of one of the disc springs 19 of the disc spring groups 18, 18, but the height of the back plate portion 27 of the outer peripheral intermediate washer 25 is the total of the disc spring groups 18, 18. Even if the height corresponding to the plate thickness is set and the height of the back plate portion 24 of the inner peripheral washer 22 is set to a height corresponding to the thickness of one of the disc springs 19 of the disc spring groups 18 and 18. Good. In the above description, the seismic isolation structure according to the present invention is applied to the common floor 11 of the fast breeder reactor building 1. However, the present invention is not limited to this, and the vertical seismic isolation according to the present invention is applied to the common floor of other buildings. The horizontal support structure of the apparatus may be applied, and in this case, the same function and effect can be obtained.

It is the schematic which showed the whole horizontal support structure of the vertical seismic isolation apparatus by this invention. FIG. 2 is a partially enlarged plan view of FIG. 1. It is the longitudinal cross-sectional view which showed the vertical seismic isolation apparatus of FIG. FIG. 4 is a plan view of FIG. 3. It is explanatory drawing which showed the method of attachment and removal of a vertical seismic isolation apparatus. It is sectional drawing of the disc spring of a disc spring seismic isolation element. It is explanatory drawing which showed the state which attached the disk spring seismic isolation element. It is a top view of a steel material damper. It is a front view of FIG. It is the longitudinal cross-sectional view which showed the other example of the damper. It is explanatory drawing which showed the relationship between the support groove | channel of a horizontal support apparatus, and a key. It is a top view of FIG. It is explanatory drawing which showed the relationship between the support hole of a horizontal support mechanism, and a support | pillar. It is a perspective view of an inner periphery intermediate washer. It is a perspective view of an outer periphery intermediate washer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Horizontal seismic isolation device 3 Reactor vessel 4 Intermediate heat exchanger 5 Primary system piping 6 Secondary system transition piping 7 Wall 8 Base 9 Base isolation object 10 Foundation 11 Common floor 12 Through hole 13 Large diameter part 14 Medium Diameter 15 Small diameter 16 Vertical seismic isolation device 17 Disc spring isolation element 18 Disc spring group 19 Disc spring 20 Upper flange 21 Lower flange 22 Inner circumferential intermediate washer 23 Washer portion 24 Back plate portion 25 Outer circumferential intermediate washer 26 Washer portion 27 Back Plate part 28 Plain washer 29 Fixed lubricant 30 Guide 31 Damper 32 Steel damper 33 Load transmission rod 34 Ball seat 35 Pin coupling 36 Lead extrusion damper 37 Pin 40 Horizontal support mechanism 41 Support groove 42 Support hole 43 Key 44 Strut 45 Rolling member (2-axis roller) 46 Rolling member (1-axis roller)
47 Clearance adjustment mechanism 48 Guide 49 Wedge 50 Adjustment screw 51 Cooling pipe

Claims (4)

A horizontal support structure for a vertical seismic isolation device that is installed inside a building that is horizontally isolated by a horizontal seismic isolation device, and that vertically isolates a common floor on which a plurality of seismic isolation objects are mounted,
The vertical seismic isolation device has a plurality of disc springs in the same direction as one unit, and a plurality of disc spring isolation systems in which the disc spring groups of one unit are combined in a plurality of stages so that the directions are staggered. Consists of elements,
Between the disc spring groups adjacent to each other in the vertical direction of the disc spring seismic isolation element, and a washer portion interposed between the inner peripheral portions of the adjacent disc spring groups; An inner peripheral intermediate washer comprising an inner peripheral surface of an adjacent disc spring group and a back plate portion arranged to be opposed to each other at a predetermined interval; and a washer portion interposed between the outer peripheral portions of the adjacent disc spring groups; , And an intermediate outer washer formed integrally with the washer part, and formed of a back plate part arranged opposite to the outer peripheral surface of the adjacent disc spring group at a predetermined interval,
The height of the back plate portion of either the inner peripheral intermediate washer or the outer peripheral intermediate washer is set to a height corresponding to the total plate thickness of the disc spring group, and the height of one of the other back plate portions is set to the plate. A horizontal support structure for the vertical seismic isolation device, characterized in that the height is set to the height of one disc spring of the spring group.   The horizontal support for the vertical seismic isolation device according to claim 1, wherein the common floor includes a horizontal support mechanism that is displaceable in a vertical direction and that is displaceable in a direction of thermal expansion in a horizontal direction. Construction.   The horizontal support mechanism is a rolling member that is provided between the common floor and the building and supports the common floor so that it can be displaced in the vertical direction and can be displaced in the direction of horizontal thermal expansion. The horizontal support structure for the vertical seismic isolation device according to claim 2. The horizontal support structure for a vertical seismic isolation device according to any one of claims 1 to 3, wherein piping for circulating a cooling medium is laid on the common floor.

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