JP6606445B2 - Cooling method and cooling device for laminated rubber type seismic isolation bearing - Google Patents

Description

  The present invention relates to a cooling method and a cooling device for a laminated rubber type seismic isolation bearing used when removing a laminated rubber type seismic isolation bearing installed in a gap between a lower structure and an upper structure.

  In the construction to replace the laminated rubber-type seismic isolation bearing installed in the gap between the lower structure and the upper structure (hereinafter sometimes referred to simply as “seismic isolation bearing”), the existing exemption installed in the gap Remove the seismic support and install a new seismic isolation support instead. When removing the seismic isolation bearing, it is usually necessary to jack up the upper structure using a jack-up device so that a gap is provided between the upper surface of the existing seismic isolation bearing and the upper structure. Take out the seismic isolation bearing. However, this method involves a very complicated operation.

  On the other hand, in Patent Documents 1 to 3, the existing seismic isolation bearing is cooled and thermally contracted so that a gap is provided between the upper surface of the existing seismic isolation bearing and the upper structure. A method to remove the seismic bearing has been proposed. However, since the body of the seismic isolation bearing is covered with highly heat-insulating rubber, it is necessary to cool the seismic isolation bearing over a long period of time until a sufficiently large gap is provided, This will prolong the work time.

JP-A-10-88824 Japanese Patent Application Laid-Open No. 9-221921 JP-A-8-291640

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling method and a cooling device for a laminated rubber-type seismic isolation bearing that can shorten the working time by rapidly cooling.

  The above object can be achieved by the present invention as described below. That is, the cooling method for a laminated rubber type seismic isolation bearing according to the present invention includes a plurality of casings arranged around the laminated rubber type seismic isolation bearing installed in the gap between the lower structure and the upper structure. A mounting step of mounting each of the bodies on the body of the laminated rubber-type seismic isolation bearing; and while supplying the cooling liquid into the casing, the gas vaporized by the cooling liquid is discharged out of the casing; And a cooling step for cooling the laminated rubber-type seismic isolation bearing by an endothermic effect accompanying vaporization. According to this method, since the seismic isolation bearing is rapidly cooled by the endothermic effect accompanying the vaporization of the coolant, a desired contracted state can be obtained relatively quickly and the working time can be shortened.

  In this cooling method, the state in which the cooling liquid is stored in the casing may be maintained. In this case, the seismic isolation bearing can be effectively cooled by the coolant stored in the housing. Alternatively, the cooling liquid may be injected into the casing and sprayed to the body of the laminated rubber-type seismic isolation bearing or the side wall of the casing facing it. In this case, the seismic isolation bearing can be cooled more effectively by spraying the coolant.

  The cooling liquid may be brought into direct contact with the body of the laminated rubber-type seismic isolation bearing using the casing opened toward the laminated rubber-type seismic isolation bearing. As a result, the seismic isolation bearing can be cooled more quickly.

  It is preferable that the cooling liquid is brought into direct contact with the body of the laminated rubber-type seismic isolation bearing using the housing opened toward the laminated rubber-type seismic isolation bearing. According to this method, the metal plate embedded in the body of the seismic isolation bearing is brought close to the surface, or the metal plate is exposed on the surface, so that the cooling rate can be increased.

  Further, the laminated rubber type seismic isolation bearing cooling device according to the present invention includes a plurality of casings mounted around the body of the laminated rubber type seismic isolation bearing, and the casing in the cooling liquid tank containing the cooling liquid. A coolant supply path that communicates with the coolant, and a flow rate adjusting unit configured to be capable of adjusting a flow rate of the coolant in the coolant supply path, and the casing is connected to the coolant supply path A port and an exhaust port for discharging the gas vaporized by the coolant supplied into the housing through the liquid supply port to the outside of the housing are formed. According to this apparatus, by using the cooling method described above, the seismic isolation bearing is quickly cooled by the endothermic effect accompanying the vaporization of the coolant, so that a desired contracted state can be obtained relatively quickly and the working time can be reduced. It can be shortened.

  In this cooling device, the detection unit that detects the height of the liquid level of the coolant stored in the housing, and the detection unit so that the state in which the coolant is stored in the housing is maintained. And a control unit that controls the flow rate adjusting unit according to the detection result. In this case, the seismic isolation bearing can be effectively cooled by the coolant stored in the housing. Or the nozzle which inject | emits the said cooling fluid toward the said laminated rubber type seismic isolation bearing within the said housing | casing may be provided in the said liquid supply port. In this case, the seismic isolation bearing can be cooled more effectively by spraying the coolant.

  The housing may be open toward the laminated rubber type seismic isolation bearing. Thus, the coolant can be brought into direct contact with the body of the seismic isolation bearing, and the seismic isolation bearing can be cooled more quickly.

  A thing provided with the energizing member which energizes so that the annular object which consists of a plurality of above-mentioned cases may be contracted is preferred. According to such a configuration, the casing is made to follow the seismic isolation bearing that thermally contracts as it cools, and the state in which the casing is mounted on the body of the seismic isolation bearing is appropriately maintained to increase the effectiveness of cooling. be able to.

Half-sectional view showing the seismic isolation bearing installed in the gap between the lower structure and the upper structure The top view which shows the housing | casing of the cooling device which concerns on 1st Embodiment. The figure which shows a mode that a seismic isolation bearing is cooled using the cooling device which concerns on 1st Embodiment. The top view which shows the modification of the housing | casing of the cooling device which concerns on 1st Embodiment. The top view which shows the housing | casing of the cooling device which concerns on 2nd Embodiment. The figure which shows a mode that a seismic isolation bearing is cooled using the cooling device which concerns on 2nd Embodiment. The perspective view which shows the housing | casing of the cooling device which concerns on 2nd Embodiment.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a laminated rubber type seismic isolation bearing 1 installed in a gap between a building foundation 2 as a lower structure and a building frame 3 as an upper structure. The seismic isolation bearing 1 includes a columnar body 11, a flange 12 provided at the lower end of the body 11, and a flange 13 provided at the upper end of the body 11. The body 11 is composed of a laminated body in which rubbers 14 and metal plates 15 are alternately arranged, and is entirely covered with the rubber 14. The flanges 12 and 13 of the seismic isolation bearing 1 are fixed to the building foundation 2 and the building frame 3 by bolts (not shown), respectively.

  In the seismic isolation bearing replacement work, the existing seismic isolation bearing 1 installed in this gap will be removed, and a new seismic isolation bearing will be installed instead. The work for removing the seismic isolation bearing 1 is to cool the seismic isolation bearing 1 and heat shrink in the axial direction (vertical direction) so that a gap is provided between the upper surface of the seismic isolation bearing 1 and the building frame 3. Done in Hereinafter, the first embodiment and the second embodiment will be exemplified as embodiments of the cooling method and the cooling device of the seismic isolation bearing 1.

[First Embodiment]
In the present embodiment, first, as shown in FIG. 2, a plurality of housings 4 are arranged around the existing seismic isolation bearing 1, and each of the housings 4 is attached to the body 11 of the seismic isolation bearing 1 ( Mounting process). In FIG. 2, the surface of the trunk | drum 11 is represented with the broken line. Next, as shown in FIG. 3, while supplying the cooling liquid L into the housing 4, the gas vaporized by the cooling liquid L is discharged out of the housing 4, and the endothermic effect accompanying the vaporization of the cooling liquid L Cool the seismic isolation bearing 1 (cooling process). Liquid nitrogen is preferably used as the cooling liquid L, but is not limited to this as long as it can cool the seismic isolation bearing 1 using heat of vaporization.

  In FIG. 2, eight housings 4 having a circular arc shape in plan view are arranged in an annular shape so as to surround the body 11, and each of them is pressed against a part of the body 11 in the circumferential direction. By adjusting the number of casings 4 and the interval between adjacent casings 4 and appropriately changing the circumference of an annular body made up of a plurality of casings 4, it can be mounted on seismic isolation bearings of various sizes. Is possible. Further, in this example, the depth (diameter dimension) of the housing 4 can be reduced as compared with the type in which the cooling liquid is injected as in the second embodiment to be described later, so that a compact configuration can be easily realized.

  The casing 4 is entirely covered with a heat insulating material 41 except for the side wall facing the base isolation bearing 1, and the side wall not covered with the heat insulating material 41 is brought into contact with the body 11 of the base isolation bearing 1. ing. The side wall of the housing 4 facing the body 11 is composed of a good heat conductive material 42 having a higher thermal conductivity than the heat insulating material 41. In this embodiment, the inner surface of the housing 4 that contacts the coolant L is entirely formed. It is formed of a good heat conductive material 42. For example, the heat insulating material 41 is made of synthetic resin, and the good heat conducting material 42 is made of metal.

  The cooling device shown in FIG. 3 includes a housing 4 attached to the body 11 of the seismic isolation bearing 1, a coolant supply path 52 that allows the housing 4 to communicate with the coolant tank 51 in which the coolant L is accommodated, And a flow rate adjusting unit 53 configured to be able to adjust the flow rate of the cooling liquid L in the cooling liquid supply path 52. In this example, the flow rate adjusting unit 53 is configured by an electromagnetic valve, but is not limited thereto. A liquid supply port 43 to which the coolant supply path 52 is connected to the housing 4, and a gas vaporized by the coolant L supplied into the housing 4 through the liquid supply port 43 is discharged to the outside of the housing 4. An exhaust port 44 for discharging is formed.

  The liquid supply port 43 and the exhaust port 44 are formed in each of the plurality of housings 4, and the coolant L is supplied to each as shown in FIG. The exhaust port 44 is assumed to be used exclusively for gas discharge, and is open to the atmosphere in this embodiment. In FIG. 2, the liquid supply port 43 cannot be seen because it is hidden behind the exhaust port 44, but one housing 4 is provided with two liquid supply ports 43 and two exhaust ports 44.

  In the present embodiment, the state in which the coolant L is stored in the housing 4 as shown in FIG. 3 is maintained. The coolant L stored in the housing 4 is adjacent to the body 11 via the side wall of the housing 4, and takes heat from the body 11 and vaporizes. The seismic isolation bearing 1 is rapidly cooled by the endothermic effect of the coolant L, particularly the endothermic effect accompanying the vaporization of the coolant L. In the housing 4, the exhaust port 44 is disposed near the ceiling, and such a configuration is convenient for increasing the liquid level of the cooling liquid L and increasing the cooling efficiency.

  In the cooling device of FIG. 3, the detection unit 54 that detects the height of the liquid level of the coolant L stored in the housing 4 and the state in which the coolant L is stored in the housing 4 are maintained. And a control unit 55 that controls the flow rate adjusting unit 53 according to the detection result of the detecting unit 54. Accordingly, it is possible to prevent the coolant L from leaking wastefully from the exhaust port 44 while keeping the liquid level of the coolant L within a certain range. The detection unit 54 is configured by, for example, a liquid level sensor, but is not particularly limited, and may be a structure using a float or a structure for monitoring the temperature distribution of the body 11.

  Before mounting the housing 4 on the body 11 of the seismic isolation bearing 1, that is, before the mounting process, a process (skinning process) of removing the skin rubber (surface layer portion of the rubber 14) of the body 11 may be provided. preferable. As a result, the metal plate 15 embedded in the body 11 of the seismic isolation bearing 1 is brought close to the surface, or the metal plate 15 is exposed to the surface. As a result, the metal plate 15 inside the body 11 is promoted to be cooled and cooled. You can speed up. In the present embodiment, a skinning process is performed, and the distance from the surface of the body 11 to the metal plate 15 is smaller than in the state of FIG.

  Regardless of whether or not the skinning process is performed, since there are fine irregularities on the surface of the body 11, a gap is easily generated between the body 11 and the housing 4 pressed against the body 11, and air is formed in the gap. When it is in the encapsulated state, the endothermic effect by the coolant L is reduced. Therefore, in the present embodiment, the filler 16 is filled in the gap generated between the body 11 and the housing 4 as shown in FIG. Thereby, formation of unnecessary gaps can be prevented, and the contact area of the housing 4 with the body 11 can be ensured to enhance the effectiveness of cooling.

  As the filler 16, a heat conductive material, preferably a material having a thermal conductivity equal to or higher than that of the good heat conductive material 42 is used. Specifically, materials such as copper, aluminum, brass, stainless steel, sintered metal, heat transfer cement, and heat transfer grease can be used as the filler. Also, various forms of fillers such as fiber, sheet, and paste can be employed, and these may be combined. As an example, a filler formed by combining copper wool with heat transfer grease can be given.

  The cooling device of FIG. 2 includes an urging member 45 that urges an annular body including a plurality of housings 4 to contract. Thereby, the case 4 can be made to follow the seismic isolation bearing 1 that is thermally contracted with cooling, and the state in which the case 4 is attached to the body 11 can be appropriately maintained, thereby improving the effectiveness of cooling. Each urging member 45 urges the adjacent casings 4 to approach each other, and urges the annular body to contract as a whole. Therefore, if the seismic isolation bearing 1 is reduced in diameter, the annular body of the housing 4 is also reduced in diameter following this, and the state where the housing 4 is pressed against the body 11 is maintained. As the urging member 45, for example, a catch clip manufactured by TAKIGEN MFG. Co., Ltd. can be used.

  In the present embodiment, an example in which the urging member 45 that is a separate member is attached between adjacent casings 4 is shown, but such an urging member may be provided on the casing 4 itself. I do not care. Further, instead of or in addition to the use of such an urging member, a band-shaped member is wound around the annular body of the housing 4, and when the seismic isolation support 1 is reduced in diameter by cooling, the band-shaped member is The annular body of the housing 4 may be reduced in diameter by tightening.

  According to this embodiment, the seismic isolation bearing 1 is rapidly cooled by the endothermic effect accompanying the vaporization of the coolant L. When a gap is provided between the upper surface of the base-isolated support 1 that has been heat-shrinked by cooling and the building frame 3, the base-isolated support 1 is taken out, and the existing base-isolated support 1 is removed. Although the body 11 is covered with the rubber 14, a desired contracted state (that is, a gap having a required size) can be obtained relatively quickly, so that the working time can be shortened. The casing 4 can be easily removed from the removed seismic isolation bearing 1 and can be reused.

  Prior to the cooling step, at least the bolts fixing the flange 13 to the building frame 3 are removed. The bolt that fixes the flange 12 to the building foundation 2 may be removed after the base isolation bearing 1 is thermally shrunk, but it is preferably removed together with the bolt of the flange 13 from the viewpoint of workability. In addition, by installing a support member in the gap between the building foundation 2 and the building frame 3 in advance, the load of the building frame 3 can be received by the support member in place of the heat-shrinkable seismic isolation bearing 1. The support member is configured by, for example, a jackup device.

  After removing the existing seismic isolation bearing 1, a new seismic isolation bearing will be installed in the gap. The newly-installed seismic isolation bearing can be easily installed in the gap after removal by cooling and heat shrinking in advance. Then, heat shrinkage is eliminated by heating the newly installed seismic isolation bearing (or leaving it at room temperature), and after the base isolation bearing is subjected to the load of the building frame 3, the support member is removed and replaced. To complete.

  Although FIG. 2 shows an example in which the internal spaces of the plurality of housings 4 are separately and independently supplied with the cooling liquid L as shown in FIG. 3, the present invention is not limited to this. For example, as shown in FIG. 4, a pair of communication pipes 46 may be interposed between adjacent casings 4 so that their internal spaces communicate with each other. One of the pair of communication pipes 46 is a gas flow path, and the other (hidden in FIG. 4 is not visible) is a cooling liquid L flow path. In such a configuration, it is sufficient if the liquid supply port 43 (not visible in FIG. 4) and the exhaust port 44 are formed in at least one housing 4.

  In the example of FIG. 3, the cooling liquid L cools the body 11 through the side wall of the housing 4. However, the present invention is not limited to this, and a housing opened toward the seismic isolation support 1 is used. The coolant L stored in (1) may be brought into direct contact with the body 11. In such a case, in order to prevent leakage of the cooling liquid L in the casing, it is preferable to provide a sealing member such as packing at the opening edge of the casing to ensure the sealing performance.

  When the seismic isolation bearing 1 is deformed due to the distortion of the building housing 3 due to an earthquake, the surface of the body 11 of the base isolation bearing 1 is inclined with respect to the vertical direction. In such a situation, it is preferable to tilt the housing 4 in order to properly contact the body 11. In order to realize such a posture of the housing 4, it is conceivable to connect the housings 4 adjacent to each other through a ball joint, for example.

[Second Embodiment]
Since the second embodiment has the same configuration as that of the first embodiment except for the configuration described below, common points will be omitted and differences will be mainly described. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the present embodiment, first, as shown in FIG. 5, a plurality of housings 6 are arranged around the existing seismic isolation bearing 1, and each of the housings 6 is attached to the body 11 of the seismic isolation bearing 1 ( Mounting process). In FIG. 5, the surface of the trunk | drum 11 is represented with the broken line. Next, as shown in FIG. 6, while supplying the cooling liquid L into the housing 6, the gas vaporized by the cooling liquid L is discharged out of the housing 6, and the endothermic effect accompanying the vaporization of the cooling liquid L Cool the seismic isolation bearing 1 (cooling process). Liquid nitrogen is preferably used as the cooling liquid L, but is not limited to this as long as it can cool the seismic isolation bearing 1 using heat of vaporization.

  In FIG. 5, fifteen casings 6 having a rectangular parallelepiped shape are arranged in an annular shape so as to surround the body 11, and each of them is pressed against a part of the body 11 in the circumferential direction. By appropriately adjusting the number of the casings 6 and the interval between the adjacent casings 6, it is possible to attach them to seismic isolation bearings of various sizes. The casing 6 is entirely covered with a heat insulating material 61 except for the side wall facing the seismic isolation bearing 1. In FIG. 5, only one housing 6 shown in the cross section is covered with the heat insulating material 61, but in reality, all the housings 6 are covered with the heat insulating material 61.

  A liquid supply port 63 connected to the coolant supply path 52 is connected to the housing 6, and a gas vaporized by the coolant L supplied into the housing 6 through the liquid supply port 63 is discharged to the outside of the housing 6. An exhaust port 64 for discharging is formed. The liquid supply port 63 and the exhaust port 64 are formed in each of the plurality of housings 6, and the coolant L is supplied to each as shown in FIG. The exhaust port 64 is assumed to be used exclusively for gas discharge. In this embodiment, the exhaust port 64 is open to the atmosphere, but it may be connected to a vacuum device to collect gas.

  In the present embodiment, the housing 6 opens toward the seismic isolation bearing 1 as shown in FIG. 7, and the coolant L is injected into the housing 6 and sprayed onto the body 11. The sprayed coolant L takes heat from the body 11 and vaporizes. The liquid supply port 63 is provided with a nozzle 7 for injecting the coolant L toward the seismic isolation bearing 1 in the housing 6. The opening edge of the housing 6 is gently curved (see FIGS. 5 and 7) and is closed by pressing it against the body 11. In FIG. 7, the heat insulating material 61, the liquid supply port 63, the exhaust port 64, and the nozzle 7 are not shown, and a seal member (not shown) such as packing is provided at the opening edge.

  The housing 6 has a nested structure in which an inner box 65 is accommodated in an outer box 66. The nozzle 7 is configured to discharge the coolant L radially, and the tip thereof is disposed in the internal space S 1 of the inner box 65. A space S2 is provided between the inner box 65 and the outer box 66, and the space S2 communicates with the inner space S1 via a notch 67 formed above the inner box 65. As shown in FIG. 5, the exhaust port 64 is arranged behind the outer box 66 away from the notch 67 and is configured to discharge the gas in the space S <b> 2.

  The seismic isolation bearing 1 is rapidly cooled by the endothermic effect of the coolant L, particularly the endothermic effect accompanying the vaporization of the coolant L. In the present embodiment, since the coolant L is directly sprayed on the body 11, heat can be taken from the body 11 more effectively. The gas vaporized by the coolant L moves from the internal space S1 through the notch 67 to the space S2, and is discharged from the exhaust port 64 to the outside of the housing 6. Filling the space S2 that surrounds the internal space S1 with low-temperature gas enhances the heat insulation effect for the inner box 65, and the gas contacts the body 11 and can contribute to cooling somewhat.

  In such an embodiment, a detection unit that detects whether or not the coolant L is sprayed on a predetermined region is provided in the cooling device, and the coolant L is appropriately injected in the housing 6. You may monitor. A gas-liquid discrimination sensor installed in a region where the coolant L is sprayed can be used as the detection unit. Furthermore, a control unit that controls the flow rate adjustment unit 53 according to the detection result of the detection unit may be provided so that the state in which the coolant L is appropriately injected is maintained.

  In the present embodiment, an example in which the cooling liquid L is brought into direct contact with the body 11 of the seismic isolation bearing 1 using the housing 6 opened toward the seismic isolation bearing 1 is shown. As described above, a housing whose side wall is pressed against the body 11 of the seismic isolation bearing 1 may be used. In that case, the body 11 can be cooled through the side wall by injecting the cooling liquid L in the housing and spraying it on the side wall of the housing facing the body 11 of the seismic isolation bearing 1. The above-described filler is useful when the side wall of the housing is pressed against the body 11, but is not necessary otherwise.

  Also in the present embodiment, it is preferable to provide a skinning step before the mounting step, thereby promoting cooling of the metal plate 15 inside the body 11 and increasing the cooling rate.

  In the present embodiment, as shown in FIG. 5, adjacent housings 6 are connected via a hinge portion 68, and the relative angles thereof can be changed. Moreover, the hinge part 68 is not intentionally connected in the circumferential part (two places in this embodiment) of the annular body which consists of the some housing | casing 6. FIG. Based on this configuration, when the seismic isolation bearing 1 is reduced in diameter by cooling, a band-like member (not shown) wound around the annular body of the housing 6 is tightened to follow the case. The diameter of the annular body can be reduced to increase the effectiveness of cooling.

  The present invention is not limited to the embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention.

  In the above-described embodiment, the cooling method using the heat of vaporization of the cooling liquid has been described. However, a conventional cooling method using the sensible heat of the cooling liquid can be implemented using this cooling device. For example, a part or all of the housing may be filled with a cooling liquid, and the seismic isolation bearing may be cooled by a conventional cooling method. In the first and second embodiments described above, an example in which the exhaust port is open to the atmosphere has been shown. However, the present invention is not limited to this. For example, a coolant recovery path is connected to the exhaust port to Alternatively, cooling may be performed while collecting and circulating the excess cooling liquid.

  Cooling experiments were conducted using actual laminated rubber-type seismic isolation bearings. The diameter of the body of the seismic isolation bearing was 1350 mm, the total rubber thickness was 250 mm, and liquid nitrogen was used as a coolant. From the viewpoint of construction in seismic isolation bearing replacement work, a displacement amount (amount of thermal shrinkage in the axial direction) of 4 mm or more is desirable, so this was set as a target value.

(1) Experimental example 1
A pipe was installed around the body of the seismic isolation bearing (see FIG. 4 of Patent Document 2 described above), and the seismic isolation bearing was cooled for 6 hours by the coolant circulating in the piping.

(2) Experimental example 2
As shown in FIGS. 2 and 3, a plurality of cases were mounted on the body of the base isolation bearing that had undergone the skinning process, and the base isolation bearing was cooled for 6 hours in a state where the coolant was stored in the case.

(3) Experimental example 3
As shown in FIGS. 5 and 6, a plurality of cases are mounted on the body of a base-isolated bearing that has undergone the skinning process, and the base-isolated support is cooled for 6 hours by directly spraying the coolant injected in the case. .

  The results of the cooling experiment are shown in Table 1. “Temperature drop” is calculated as the difference between the temperature measured at the center of the seismic isolation bearing before cooling and 6 hours after cooling. The “displacement amount” is calculated as a difference between the height position of the center portion of the seismic isolation bearing measured before cooling and 6 hours after cooling.

  As shown in Table 1, in Experimental Example 1, the temperature drop and the amount of displacement were the smallest, and the target value was not reached after 6 hours of cooling. On the other hand, in Experimental Example 2 and Experimental Example 3, the temperature drop and the displacement amount are larger than in Experimental Example 1, and it is considered that the working time can be shortened by rapid cooling. Among them, the experimental example 3 greatly exceeds the target value, and the improvement effect is larger than the experimental example 2.

1 Laminated rubber type seismic isolation bearing 2 Building foundation (example of substructure)
3 Building frame (example of superstructure)
4 Case 6 Case 7 Nozzle 11 Body 14 Rubber 15 Metal plate 16 Filler 43 Supply port 44 Exhaust port 45 Energizing member 51 Coolant tank 52 Coolant supply path 53 Flow rate adjustment unit 54 Detection unit 55 Control unit 63 Supply Liquid port 64 Exhaust port

Claims (10)

A plurality of casings are arranged around a laminated rubber type seismic isolation bearing installed in the gap between the lower structure and the upper structure, and each of the casings is attached to the body of the laminated rubber type seismic isolation bearing. Process,
A cooling step of supplying the cooling liquid into the housing, discharging the gas evaporated from the cooling liquid to the outside of the housing, and cooling the laminated rubber-type seismic isolation bearing by an endothermic effect accompanying the vaporization of the cooling liquid; Cooling method of laminated rubber type seismic isolation bearing.   The method for cooling a laminated rubber type seismic isolation bearing according to claim 1, wherein the state in which the coolant is stored in the housing is maintained.   The cooling method of a laminated rubber type seismic isolation bearing according to claim 1, wherein the cooling liquid is injected into the casing and sprayed to a body of the laminated rubber type seismic isolation bearing or a side wall of the casing facing the body.   4. The coolant according to claim 1, wherein the cooling liquid is brought into direct contact with a body of the laminated rubber-type seismic isolation bearing using the casing opened toward the laminated rubber-type seismic isolation bearing. 5. Cooling method for laminated rubber type seismic isolation bearing.   The cooling method of the laminated rubber type seismic isolation bearing according to any one of claims 1 to 4, wherein a skin rubber of a body of the laminated rubber type seismic isolation bearing is removed before the mounting step. A plurality of housings mounted around the body of the laminated rubber-type seismic isolation bearing, a cooling fluid supply path for communicating the casing with a cooling fluid tank containing a cooling fluid, and the cooling in the cooling fluid supply passage A flow rate adjustment unit configured to be able to adjust the flow rate of the liquid,
A liquid supply port to which the cooling liquid supply path is connected to the casing, and an exhaust for discharging the gas vaporized by the cooling liquid supplied into the casing through the liquid supply port to the outside of the casing Cooling device for laminated rubber-type seismic isolation bearing with a mouth. A detection unit that detects the height of the liquid level of the coolant stored in the housing;
The laminated rubber mold exemption according to claim 6, further comprising: a control unit that controls the flow rate adjusting unit according to a detection result of the detection unit so that the state in which the cooling liquid is stored in the housing is maintained. Seismic bearing cooling system.   The cooling apparatus for a laminated rubber type seismic isolation bearing according to claim 6, wherein a nozzle for injecting the cooling liquid toward the laminated rubber type seismic isolation bearing in the casing is provided at the liquid supply port.   The cooling device for a laminated rubber type seismic isolation bearing according to any one of claims 6 to 8, wherein the casing is opened toward the laminated rubber type seismic isolation bearing.   The laminated rubber type seismic isolation bearing cooling device according to any one of claims 6 to 9, further comprising an urging member that urges an annular body including the plurality of casings to contract.

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