JP2018035833A - Seismic isolated piping joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic isolated piping joint that can further increase adhesion between laminates and further reduce possibility of leakage of internal fluid of piping.SOLUTION: A seismic isolated joint 110 has a structure where multiple ring-shaped reinforced rubber tubes 1 are laminated in a piping axial direction. The reinforced rubber tube 1 includes: an injection port 4 for injecting a compression material into the tube 1; a projection part 2 provided on an outer periphery of the tube 1; a groove 3 provided so as to be mutually fitted to the projection part 2; and a cap 5 for covering the injection port 4.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic isolation piping joint.

  In order to absorb horizontal relative displacement while maintaining pressure resistance and water tightness as piping, Patent Document 1 discloses that the piping connection structure has a clearance, and the first metal ring and the second metal ring. The first metal ring and the second metal ring can be slid relative to each other, and as a result, the first metal rings can be slid by a maximum of about 100 mm. Is a laminated structure. For example, when there are 11 layers, a pipe connection structure capable of absorbing a horizontal relative displacement of 1000 mm at maximum is described.

JP 2011-117578 A

  In recent years, it has been considered to make a nuclear plant seismic isolation. In such a base-isolated nuclear plant, even if the ground or foundation is greatly displaced during an earthquake, the nuclear plant building is not displaced so much and the absolute displacement of the building is reduced. For this purpose, it is necessary to absorb the relative displacement between the building and the foundation, thereby greatly improving the earthquake resistance of the nuclear power plant building and the equipment installed therein.

  By the way, the nuclear power plant has a circulating water system function for supplying cooling water taken from outside to cooling equipment such as a condenser, cooling turbine exhaust and drain flowing into the condenser, and discharging the water outside the plant. I have.

  As described above, during the earthquake, the building has an earthquake response different from that of the surrounding ground and foundation, so that a relative displacement between the building and the foundation occurs. Therefore, it becomes a problem how to make the connection between the piping in the building and the piping in the foundation embedded in the ground.

  In general, flexible connection piping structures such as expansion joints are known as seismic isolation piping joints capable of absorbing displacement. Large-scale seismic isolation pipe joints in nuclear power plants are required to ensure a high level of safety and reliability. That is, sufficient deformation absorbability is required while satisfying sufficient pressure resistance and water tightness. Rubber expansion joints are used in actual nuclear power plants.

  However, when the seismic isolation structure is applied to a nuclear power plant, the relative displacement between the building and the foundation that occurs at the time of the earthquake is larger than when the seismic isolation structure is not applied. At this time, even if a conventional rubber expansion joint is applied to the seismic isolation pipe joint, a sufficient displacement absorbing effect cannot always be obtained. Therefore, in order to spread the seismic isolation of nuclear power plants, it is urgent to develop a structure that absorbs the relative displacement by allowing the displacement of the seismic isolation pipe joint itself.

  As one of the seismic isolation pipe joints that absorbs the horizontal relative displacement, there is a technique described in Patent Document 1 described above. Patent Document 1 describes a pipe provided between a building pipe and a foundation pipe of a nuclear power plant building having a seismic isolation structure.

  However, since the piping structure described in Patent Document 1 is a structure in which a plurality of metal rings and gaskets interposed between the metal rings are alternately stacked, fluid in the piping leaks between the metal and the gasket. There is a problem that the possibility to do is undeniable.

  The objective of this invention is providing the seismic isolation piping joint which can improve the adhesiveness between laminated bodies more, and can make the possibility of the leakage of piping internal fluid lower.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present invention includes a plurality of means for solving the above-mentioned problems, but if an example is given, it is a seismic isolation pipe joint, and a structure in which a plurality of ring-shaped reinforced rubber tubes are laminated in the pipe axis direction, The reinforced rubber tube has an inlet for injecting a pressure material into the tube, a protrusion provided on the circumference of the tube, and a groove provided to fit the protrusion. It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the adhesiveness between laminated bodies can be improved more and the possibility of the leakage of piping internal fluid can be made lower. Problems, configurations, and effects other than those described above will be clarified by the following description of examples.

It is the schematic of the nuclear power plant to which the seismic isolation piping joint of this invention is applied. It is a figure which shows the general | schematic cross section of the state which applied the seismic isolation piping joint of this invention to nuclear power circulating water piping. It is a perspective view which shows the whole reinforced rubber tube used for the seismic isolation piping joint of this invention. It is a figure which shows the cross section of the reinforced rubber tube shown in FIG. It is sectional drawing which shows the outline of the building side joint connected with the building side among seismic isolation piping joints. It is sectional drawing which shows the outline of the foundation side coupling connected with the foundation side among seismic isolation piping joints. It is a figure explaining the principle by which the sealing performance between reinforced rubber tubes is improved. It is the elements on larger scale of FIG. It is a figure which shows the outline of the state in which the seismic isolation pipe joint of this invention follows a big displacement. It is a figure which shows the outline of the state in which the seismic isolation pipe joint of this invention follows a big displacement. It is a figure which shows the outline of the state in which the seismic isolation pipe joint of this invention follows a big displacement. It is sectional drawing which shows the outline before the pressurization of a reinforced rubber tube. It is sectional drawing which shows the outline after the pressurization of a reinforced rubber tube.

  An embodiment of the seismic isolation pipe joint of the present invention will be described with reference to FIGS.

  First, an outline of a nuclear power plant to which the seismic isolation pipe joint of this embodiment is applied will be described with reference to FIG. FIG. 1 is a schematic view of a nuclear power plant to which the seismic isolation pipe joint of this embodiment is applied.

  In FIG. 1, a building 101 that houses equipment such as a nuclear reactor is supported on a foundation 103 installed on a rock mass 102 via a seismic isolation device 104. The seismic isolation device 104 has a function of separating the building 101 and the foundation 103, and does not displace the building 101 as much as the foundation 103 even if the foundation 103 is greatly displaced (decreases the absolute displacement). Thereby, the seismic wave propagated through the ground is attenuated by the seismic isolation device 104, the magnitude of the seismic wave transmitted to the building 101 is reduced, and the seismic response of the equipment accommodated in the building 101 is not a seismic isolation structure Compared with As a result, a large relative displacement occurs between the building 101 and the foundation 103.

  On the other hand, a cooling facility such as a condenser 105 is installed in the nuclear power plant. The cooling facility takes cooling water from outside the nuclear plant and discharges the cooled cooling water outside the nuclear plant. The condenser 105 is a device that cools and condenses the water vapor after taking out work by a turbine (not shown), and returns it to a low-pressure saturated liquid. An indoor pipe 106 is connected to the condenser 105, and an in-foundation pipe 107 is connected to the indoor pipe 106 via a seismic isolation pipe joint 110. Seawater is often used as cooling water from outside the nuclear power plant. In this way, the intake pipe is configured so that the high-pressure seawater pumped up is supplied to the condenser 105 through the basic pipe 107, the seismic isolation pipe joint 110, and the building pipe 106. The drainage pipe is similarly configured.

  Next, the seismic isolation pipe joint 110 of the present invention will be described with reference to FIG. FIG. 2 is a diagram showing a schematic cross section in a state where the seismic isolation pipe joint 110 of the present invention is applied to nuclear circulating water.

  In FIG. 2, a seismic isolation pipe joint 110 is a joint that can be expanded and contracted and moved in the left-right direction to connect the building-side circulating water pipe 8 a on the building 101 side and the foundation-side circulating water pipe 8 b on the foundation 103 side.

  The seismic isolation pipe joint 110 includes a building side joint portion 11a that connects the building side circulating water pipe 8a and the reinforced rubber tube 1, a laminated structure in which a plurality of ring-shaped reinforced rubber tubes 1 are laminated in the pipe axis direction, and a foundation side. It consists of the foundation side joint part 11b which connects the circulating water piping 8b and the reinforcement | strengthening rubber tube 1. FIG.

  In the seismic isolation pipe joint 110, the reinforced rubber tubes 1 are not completely fixed to each other. For this reason, it has a structure in which it is difficult to transmit a vibration such as an earthquake to the building-side circulating water pipe 8a. The building side joint part 11a has a flange structure that is paired with the building side circulating water pipe 8a, and the foundation side joint part 11b has a flange structure that is paired with the foundation side circulating water pipe 8b. It is connected to the.

  Next, details of the structure of the reinforced rubber tube 1 mainly constituting the seismic isolation pipe joint 110 will be described with reference to FIGS. FIG. 3 is a perspective view of a reinforced rubber tube. FIG. 4 is a cross-sectional view of the reinforced rubber tube 1.

  As shown in FIG. 3, the reinforced rubber tube 1 has a ring structure, a protrusion 2 provided on the circumferentially vertical lower side of the ring, a groove 3 provided on the circumferentially vertical upper side, And an inlet 4 for injecting a pressure material into the space 1b in the reinforced rubber tube 1. As described above, the seismic isolation pipe joint 110 has a structure in which the reinforced rubber tubes 1 are laminated, and the reinforced rubber tube 1 is reinforced by fitting the protrusion 2 of the reinforced rubber tube 1 into the groove 3 of the adjacent reinforced rubber tube 1. The rubber tubes 1 are connected to each other. Because of the laminated structure, it is possible to replace only the defective reinforced rubber tube 1 when a problem occurs due to wear or the like.

  As shown in FIG. 4, a reinforcing material 1 a such as a metal mesh, a wire, or a reinforcing fiber is placed in the circumferential direction inside the reinforced rubber tube 1 to improve the strength against pressure in the circumferential direction and the radial direction. ing. The material of the rubber part of the reinforced rubber tube 1 can be a general material used for tires and the like, and additives are appropriately added.

  As shown in FIG. 4, a cap 5 for maintaining the internal pressure of the reinforced rubber tube 1 is attached to the injection port 4. The reinforced rubber tube 1 expands by injecting a pressurized liquid such as water into the space 1b in the reinforced rubber tube 1 from the injection port 4 using a liquid delivery device such as a pump. At this time, the pressurized liquid is also filled in the protruding portion 1c of the space 1b, and the protruding portion 2 provided on the reinforced rubber tube 1 is also expanded at the same time, so that the adhesion with the adjacent groove portion 3 can be enhanced.

  The cap 5 is a known type such as a cap type that covers the injection port 4, a screw type that screws the cap into a screw thread provided on the outer peripheral side or inner peripheral side of the injection port 4, and a press-fitting type that press-fits the cap into the injection port 4. A structure can be used. FIG. 4 illustrates the case of using a cap type that covers the inlet 4.

  The inlet 4 and the cap 5 can adopt a structure similar to the structure generally used for tires such as automobiles.

  Further, a metal reinforcing plate 6 is disposed between the protrusion 2 and the groove 3 to ensure the strength of the connecting portion between the protrusion 2 and the groove 3. The reinforcing plate 6 may be provided over the entire circumferential direction between the protrusion 2 and the groove 3 or may be provided in a part of the circumferential direction.

  The pressure liquid is most preferably water, but a liquid other than water can be used as the pressure liquid. Further, not only liquid but also gas such as gel substance or air can be used for pressurization.

  Next, the structure of the building side joint part 11a which connects the building side circulating water piping 8a and the reinforcement | strengthening rubber tube 1 is demonstrated using FIG. FIG. 5 is a cross-sectional view of a connection portion between the seismic isolation piping joint 110 and the building piping 106.

  As shown in FIG. 5, the building side joint part 11a for connecting the reinforced rubber tube 1 to the building side circulating water pipe 8a includes a flange part 11a1 having the same diameter as the flange part 8a1 of the building side circulating water pipe 8a, and a flange. The reinforcing rubber tube portion 11a2 is fitted into the groove of the portion 11a1, and the reinforcing rubber tube portion 11a2 is provided with a protruding portion 11a3 that fits into the groove portion 3 of the reinforcing rubber tube 1. The reinforced rubber tube portion 11a2 has a space 11a4 for injecting a pressurized liquid therein, an inlet 11a5 for injecting the pressurized liquid into the space 11a4, and a cap 11a6 attached to the inlet 11a5. Is provided. Similarly to the reinforced rubber tube 1, the reinforced rubber tube portion 11a2 is also provided with a reinforcing material such as a metal mesh, a wire, or a reinforced fiber in the circumferential direction. The material is also the same as that of the reinforced rubber tube 1. The inner diameter of the ring-shaped reinforced rubber tube portion 11a2 is thicker than the inner diameter of the building piping 106 or the building-side circulating water piping 8a, but may be the same diameter or a narrow diameter. The cap 11a6 has the same structure as the cap 5.

  The flange portion 11a1 of the building side joint portion 11a and the flange portion 8a1 of the building side circulating water pipe 8a are provided with holes for passing the bolts 7. As described above, the building side joint portion 11a and the building side circulating water are provided. The piping 8a is fixed and connected by tightening the bolt 7, and the seismic isolation piping joint 110 and the building piping 106 are connected.

  Next, the structure of the foundation side joint part 11b which connects the foundation side circulating water piping 8b and the reinforcement | strengthening rubber tube 1 is demonstrated using FIG. FIG. 6 is a cross-sectional view of a connection portion between the seismic isolation pipe joint 110 and the foundation internal pipe 107.

  As shown in FIG. 6, the foundation side joint part 11b for connecting the reinforced rubber tube 1 to the foundation side circulating water pipe 8b includes a flange part 11b1 having the same diameter as the flange part 8b1 of the foundation side circulating water pipe 8b, The reinforcing rubber tube portion 11b2 is fitted in the groove of the portion 11b1, and the reinforcing rubber tube portion 11b2 is provided with a groove portion 11b3 that fits the protruding portion 2 of the reinforced rubber tube 1. The reinforced rubber tube portion 11b2 has a space 11b4 for injecting a pressurized liquid therein, an inlet 11b5 for injecting the pressurized liquid into the space 11b4, and a cap 11b6 attached to the inlet 11b5. Is provided. Further, similarly to the reinforced rubber tube 1, the reinforced rubber tube portion 11b2 is provided with a reinforcing material such as a metal mesh, a wire, or a reinforced fiber in the circumferential direction. The material is also the same as that of the reinforced rubber tube 1. The inner diameter of the ring-shaped reinforced rubber tube portion 11b2 is larger than the inner diameter of the foundation inner pipe 107 and the foundation-side circulating water pipe 8b, but may be the same diameter or a smaller diameter. The cap 11b6 has the same structure as the cap 5.

  The flange portion 11b1 of the foundation side joint portion 11b and the flange portion 8b1 of the foundation side circulating water pipe 8b are also provided with holes for passing the bolts 7. As described above, the foundation side joint portion 11b and the foundation side circulating water are provided. The pipe 8b is fixed and connected by tightening the bolt 7, and the seismic isolation pipe joint 110 and the foundation internal pipe 107 are connected.

  In addition, in the building side joint part 11a and the foundation side joint part 11b, although the case where it was a separate body which inserts reinforcement rubber tube part 11a2, 11b2 in the groove | channel of flange part 11a1, 11b1, reinforcement rubber tube part 11a2 and flange part 11a1 was demonstrated. Alternatively, the reinforced rubber tube portion 11b2 and the flange portion 11b1 may be integrally formed of reinforced rubber.

  Next, the principle of improving the adhesion between the reinforced rubber tubes 1 in the seismic isolation pipe joint 110 of the present embodiment will be described with reference to FIGS. FIG. 7 is a view for explaining the principle of improving the sealing performance between the reinforced rubber tubes, and FIG. 8 is a partially enlarged view of FIG.

  As shown in FIGS. 7 and 8, in the seismic isolation pipe joint 110, the pressure 10 from the circulating water in the seismic isolation pipe joint 110 and the pressurized liquid in the reinforced rubber tube 1 and the reinforced rubber tube portions 11a2 and 11b2 are used. The pressure 9 is applied to the connecting portion between the protrusions 2 and 11a3 and the grooves 3 and 11b3. Further, since the pressurized liquid is injected into the reinforced rubber tube 1 and the reinforced rubber tube portions 11a2 and 11b2, the protruding portions 2 and 11a3 are also expanded, and the adhesion to the groove portions 3 and 11b3 is enhanced.

  Further, a reinforcing plate 6 is disposed between the protrusions 2 and 11a3 and the grooves 3 and 11b3. Due to these effects, the adhesion between the protruding protrusions 2 and 11a3 and the grooves 3 and 11b3 is enhanced, and the circulating water is held without leakage.

  Next, a state when a large displacement occurs between the building 101 and the foundation 103 in this embodiment will be described with reference to FIGS. 9 to 11. FIG. 9 is a diagram showing an example of the state of the seismic isolation pipe joint 110 when a large displacement is generated in the axial direction of the pipe, and FIGS. 10 and 11 are diagrams when the large displacement is generated in the axial direction of the pipe.

  As shown in FIG. 9, when the foundation 103 is greatly displaced to the left in the figure, the foundation-side joint portion 11 b on the foundation 103 side and the reinforced rubber tube 1 close thereto are pulled and greatly displaced by the foundation 103, but laminated reinforcement The rubber tube 1 is displaced one layer at a time, and the cross section of the reinforced rubber tube 1 itself is also deformed. For this reason, the amount of displacement in the direction perpendicular to the axis decreases toward the building 101 side. As a result, the amount of displacement in the direction perpendicular to the axis can be absorbed by the stacked layers, and the building 101 side is absolute from the original position. The displacement can be reduced. At this time, since the projecting portions 2 and 11a3 and the groove portions 3 and 11b3 enhance the degree of close contact in the axial direction, the pressure resistance and water tightness of the piping can be maintained.

  Moreover, when the displacement which shrinks to an axial direction so that the building 101 and the foundation 103 approach as shown in FIG. 10 arises, the cross section of the reinforced rubber tube 1 itself shrinks, and absorbs the displacement of an axial direction only by the laminated | stacked. Can do. Similarly, as shown in FIG. 11, even when a displacement extending in the axial direction occurs so that the building 101 and the foundation 103 are separated from each other, the cross section of the reinforced rubber tube 1 itself is extended, and the axial displacement is absorbed by the amount laminated. can do.

  Next, an installation method, a replacement method, and a removal method of the seismic isolation pipe joint 110 according to the present embodiment will be described with reference to FIGS. 12 and 13. FIG. 12 shows a state before the reinforced rubber tube 1 is pressed, and FIG. 13 shows a state after the reinforced rubber tube 1 is pressed.

  First, a building side joint part 11a, a plurality of reinforced rubber tubes 1, and a foundation side joint part 11b are prepared, and the flange part 8a1 of the building side circulating water pipe 8a and the flange part 11a1 of the building side joint part 11a are bolted. 7, and the flange portion 8 b 1 of the foundation side circulating water pipe 8 b and the flange portion 11 b 1 of the foundation side joint portion 11 b are fixed and connected by the bolt 7.

  Next, the protrusion 2 of the reinforced rubber tube 1 is fitted into the groove 11b3 of the base side joint 11b, and the protrusion 2 of another reinforced rubber tube 1 is fitted into the groove 3 of the reinforced rubber tube 1, as shown in FIG. A predetermined number of the reinforced rubber tubes 1 are stacked on each other. At this time, the reinforcing plate 6 is attached between the groove 11b3 and the protrusion 2 or between the groove 3 and the protrusion 2.

  Next, a predetermined amount of water is injected as a pressurized liquid from the inlet 11a5 of the building side joint part 11a, the inlet 4 of the reinforced rubber tube 1, and the inlet 11b5 of the foundation side joint part 11b. At this time, the amount of water to be injected is adjusted so that each rubber tube has the same pressure. At this time, the upper groove portion 3 of the uppermost reinforcing rubber tube 1 and the projection portion 11a3 of the building side joint portion 11a are fitted together. By attaching the caps 5, 11a6, 11b6 to the inlets 4, 11a5, 11b5 in a state where the pressure is evenly applied to all the rubber tubes, the seismic isolation pipe joint 110 is obtained as shown in FIG.

  In the seismic isolation pipe joint 110 of this embodiment, the cap 5, 11a6, 11b6 is removed from the inlets 4, 11a5, 11b5 and water is discharged from the inside of the tube to reduce the pressure during inspection and the like, as shown in FIG. From such a state, the state shown in FIG. 12 is obtained, and the reinforcing rubber tube 1 and the like can be easily checked including the inside of the pipe. When replacement is necessary, only the defective reinforced rubber tube 1 is replaced. When reattaching, as described above, water may be injected for the same pressure in each rubber tube.

  Next, the effect of the present embodiment will be described.

  The above-described seismic isolation pipe joint 110 of the present invention has a structure in which a plurality of ring-shaped reinforced rubber tubes 1 are laminated in the direction of the pipe axis, and the reinforced rubber tube 1 is used for injecting a pressure material into the tube 1. It has an inlet 4, a protrusion 2 provided on the circumference of the tube 1, and a groove 3 provided so as to fit with the protrusion 2.

  In such a seismic isolation pipe joint 110, the adhesiveness between the reinforced rubber tubes 1 stacked together is increased by injecting a pressurized liquid into the reinforced rubber tube 1 and applying pressure thereto. Further, the adhesion of the connecting portion is enhanced by the protrusion 2 and the groove 3. Therefore, the adhesion between the laminated reinforced rubber tubes 1 is in a high state, and the possibility of leakage of the fluid flowing through the inside of the pipe can be sufficiently reduced as compared with the conventional case.

  Further, the construction is prior to pressurization of the reinforced rubber tube 1, and the construction is very easy. And it becomes possible to implement simply the operation | work at the time of the inspection of the reinforced rubber tube 1 or replacement | exchange by reducing pressure. Moreover, since it is the laminated structure of the reinforced rubber tube 1, only what has a defect should be replaced | exchanged. Therefore, there is no need to replace the entire joint, which is efficient and economical.

  Furthermore, when a displacement occurs between the building 101 and the foundation 103, the laminated reinforcing rubber tube 1 is displaced one layer at a time or the reinforcing rubber tube 1 itself is displaced to absorb a large displacement as a whole. It is possible to absorb a relative variation during an earthquake that occurs between the pipe 106 in the building 101 having the base isolation structure and the pipe 107 in the foundation 103. Therefore, it becomes suitable especially for the seismic isolation pipe joint provided between the building piping and the foundation piping of the nuclear power plant building having the seismic isolation structure.

  Further, since the reinforcing plate 6 is provided between the protrusion 2 and the groove 3, the strength of the connecting portion between the protrusion 2 and the groove 3 can be further ensured, and a more reliable seismic isolation pipe joint. 110 structures are obtained.

  Furthermore, the protrusion 2 is provided on the lower side in the vertical direction of the reinforced rubber tube 1, and the groove 3 is provided on the upper side in the vertical direction of the reinforced rubber tube 1, so that the degree of adhesion between the protrusion 2 and the groove 3. And the reliability of the piping structure can be further increased.

  Further, since the reinforcing rubber tube 1 includes the reinforcing material 1a, it is possible to improve the strength of the tube itself against displacement and pressure from the circulating water, and similarly further improve the reliability of the piping structure. be able to.

  Further, the reinforced rubber tube 1 has a protrusion 1c having the same shape as the protrusion 2 in the space 1b inside the protrusion 2 on the inner peripheral side, thereby further increasing the degree of adhesion between the protrusion 2 and the groove 3. This can improve the reliability of the piping structure.

  Moreover, the building side joint part 11a which connects the building side circulating water piping 8a and the reinforced rubber tube 1, and the foundation side joint part 11b which connects the foundation side circulating water piping 8b and the reinforced rubber tube 1 are further provided, and the building side The joint part 11a has a protrusion part 11a3 that fits into the groove part 3 of the reinforced rubber tube 1, and the base-side joint part 11b has a groove part 11b3 that fits into the protrusion part 2 of the reinforced rubber tube 1, so that the building 101 or Adhesion of the connecting portion between the foundation 103 side and the reinforced rubber tube 1 can be ensured, and the piping performance can be improved.

<Others>
In addition, this invention is not restricted to said Example, A various deformation | transformation and application are possible. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

  For example, in the above-described embodiment, the case where the building is a nuclear power plant has been described. However, the building is not limited to the nuclear power plant, and any building that requires a seismic isolation structure can be applied as necessary.

DESCRIPTION OF SYMBOLS 1 ... Reinforcement rubber tube 1a ... Reinforcement material 1b ... Space 1c ... Projection part 2 ... Projection part 3 ... Groove part 4 ... Inlet 5 ... Cap 6 ... Reinforcement plate 7 ... Bolt 8a ... Building side circulating water piping 8a1 ... Flange part 8b ... Base side circulating water pipe 8b1 ... Flange part 9 ... Pressure from pressurized liquid 10 ... Pressure from circulating water 11a ... Building side joint part 11b ... Base side joint part 11a1, 11b1 ... Flange part 11a2, 11b2 ... Reinforced rubber tube part 11a3 ... Projection part 11b3 ... Groove parts 11a4 and 11b4 ... Space 11a5 and 11b5 ... Inlet 11a6 and 11b6 ... Cap 101 ... Building 102 ... Rock bed 103 ... Foundation 104 ... Seismic isolation device 105 ... Condenser 106 ... Building piping 107 ... Foundation Inner piping 110 ... Seismic isolation piping joint

Claims (6)

A seismic isolation piping joint,
It is a structure in which a plurality of ring-shaped reinforced rubber tubes are stacked in the pipe axis direction.
The reinforced rubber tube is
An inlet for injecting pressurized material into the tube;
A protrusion provided on the circumference of the tube;
A seismic isolation piping joint, comprising: a groove provided so as to be fitted to the protrusion. In the seismic isolation pipe joint according to claim 1,
A seismic isolation piping joint, wherein a reinforcing plate is provided between the protrusion and the groove. In the seismic isolation pipe joint according to claim 1,
The protrusion is provided on the lower side in the vertical direction of the reinforced rubber tube,
The said groove part was provided in the perpendicular direction upper side of the said reinforced rubber tube. The seismic isolation piping joint characterized by the above-mentioned. In the seismic isolation pipe joint according to claim 1,
The reinforced rubber tube is a seismic isolation pipe joint characterized by containing a reinforcing material. In the seismic isolation pipe joint according to claim 1,
The reinforced rubber tube has a projection having the same shape as the projection on the inner side of the projection on the inner peripheral side. In the seismic isolation pipe joint according to claim 3,
A building-side joint that connects the building-side piping and the reinforced rubber tube, and a foundation-side joint that connects the foundation-side piping and the reinforced rubber tube;
The building side joint has a protrusion that fits into the groove of the reinforced rubber tube,
The base-side joint has a groove portion that fits into the protruding portion of the reinforced rubber tube.

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