JPH10160039A - Earthquake-resistant piping device for vibration isolated building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolated building equipped with an earthquake- resistant piping device which can attain high mechanical strength and withstanding pressure, reduction in a fitting space, elimination of facilities, and whose turning force is small and whose reaction force at a fixed point is small. SOLUTION: This earthquake-resistant piping device 6 consists of six tuning parts 1 to 6, a plurality of straight pipe parts 7, 11, 13, 19 and 17, and a plurality of bent pipe parts 8, 9, 10, 12, 18, 16, 15 and 14. Respective pipes are fixedly connected, or are turnably connected the turning parts to be formed into a deformable dog-leg shape, which is formed between the fixed piping 4 of a foundation and the fixed piping 5 of a building. The turning parts 1 to 6 are joints whose coupling and swing, made of steel, are turnably connected by a plurality of balls held by a double row ball races and respective ball races. The earthquake-resistance piping device 6 absorbs the relative movement of the building and the foundation. The movement in the vertical direction, horizontal direction, front/rear direction (vertical direction to this page space), and a turning direction (turning direction whose turning axis is the vertical direction) is absorbed in the turning parts 1 to 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic piping system for a base-isolated building.

[0002]

2. Description of the Related Art FIG. 6A shows a structure of a base-isolated building. The building 1 is built on a foundation 3 via a seismic isolation device 2. The general seismic isolation device 2 has a configuration in which a disk-shaped rubber plate and a steel plate are alternately stacked, but a columnar lead plug is arranged at the center. The rubber plate has a function of easily displacing the rubber plate by increasing its vertical rigidity and minimizing the displacement, and lowering the horizontal rigidity because it mainly receives its own weight. Lead plugs consume the input energy of an earthquake and enhance the damping effect. When the foundation 3 shakes due to the earthquake, the shaking is absorbed by the seismic isolation device 2, the building 1 slowly shakes in the horizontal direction while maintaining the overall shape, and the vibration is greatly attenuated.

When the building 1 shakes due to an earthquake, a displacement occurs between the piping on the building 1 side and the piping on the foundation 3 side. Conventionally, in order to absorb this, a flexible joint made of stainless steel or rubber or a ball joint has been used for the pipe between the building 1 and the foundation 3.

[0004]

The flexible joint has problems that it is susceptible to elongation and torsion caused by relative displacement due to an earthquake, has low pressure resistance, and has a large mounting space. Although ball joints have high pressure resistance, they require a large force to move, so the reaction force at the fixed point is large, and a tilt prevention guide and slide base are required.
Again, there is a problem that the mounting space is large.

The present invention has high mechanical strength and pressure resistance,
It is an object of the present invention to provide an earthquake-resistant piping device for a base-isolated building which has a small mounting space, does not require ancillary equipment such as a tilt prevention guide and a slide stand, and has a small rotating force and a small reaction force at a fixed point.

[0006]

According to a first aspect of the present invention, there is provided a seismic isolation piping system for a seismic isolation building, comprising: a first structure and a second structure which relatively move via the seismic isolation device during an earthquake; And a plurality of straight pipe sections, a plurality of curved pipe sections, and a plurality of rotatable joints.

According to a second aspect of the present invention, there is provided an earthquake-resistant piping apparatus for a base-isolated building according to the first aspect, wherein the first structure is a second structure. It is characterized by being installed on a foundation via the seismic isolation device.

According to a third aspect of the present invention, there is provided the seismic isolation piping system for a seismic isolation building according to the first aspect, wherein the upper building as the first structure is a second structure. It is characterized by being installed on a certain lower building via the seismic isolation device.

According to a fourth aspect of the present invention, there is provided the seismic isolation piping system for a seismic isolation building according to the first aspect, wherein the first structure and the second structure are each the seismic isolation device. It is characterized by being built on a foundation via devices.

According to a fifth aspect of the present invention, there is provided a seismic isolation piping system for a seismic isolation building according to the first, second, third, or fourth aspect, wherein the joint comprises a double row ball race and the ball race. It is a rotatable joint having a plurality of balls held in each ball race.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. This example is shown in FIG.
The seismic isolation building 1 as a structure shown in (a) is provided with a seismic pipe system 6 for seismic isolation building as shown in FIG. As shown in FIG. 6B, a fixed pipe 4 is arranged on a foundation 3 as a structure. The tip of the fixed pipe 4 is directed vertically upward in the vicinity of the building 1. In the building 1 installed on the foundation 3 via the seismic isolation device 2, a fixed pipe 5 is arranged along the vertical direction, and the lower end thereof is directed right below.

As shown in FIG. 1, this seismic pipe system 6 for seismic isolation building (hereinafter referred to as seismic pipe system 6) has six rotating parts, a plurality of straight pipes, and a plurality of curved pipes. These pipes are fixedly or rotatably connected to form a deformable dog leg shape, and are provided between the fixed pipe 4 of the foundation 3 and the fixed pipe 5 of the building 1.

The fixed pipe 4 of the foundation 3 has a short straight pipe 7,
Three curved tubes 8, 9, 10 are connected in order. Rotating parts are respectively provided at three places on both ends of the two curved pipes 8 and 9 on the side of the short straight pipe 7. A short straight pipe 13 is connected via a bent pipe 12 to the upper end of a lower long straight pipe 11 fixed to the bent pipe 10. In the fixed piping 5 of the building 1,
Three curved tubes 14, 15, 16 are connected in order. Rotating parts are provided at two places at both ends of the second curved tube 15 from the building side. A short straight pipe 19 is connected via a curved pipe 18 to the lower end of the upper long straight pipe 17 fixed to the bent pipe 16. A rotating part is provided between the two short straight pipes 13 and 19.

The rotating part 1 of this embodiment is a rotatable joint 20 shown in FIG. The joint 20 is a joint in which a steel coupling 21 and a swing 22 are rotatably connected by a double-row ball race and a plurality of balls 23 held in each ball race. The internal fluid is prevented from leaking by an internal pressure packing 24 provided between the coupling 21 and the swing 22. A dust seal 25 is provided between the coupling 21 and the swing 22 outside the inner pressure packing 24 and the ball 23 to prevent dust and rainwater from entering from outside.

The earthquake-resistant piping device 6 of the present embodiment absorbs the relative movement between the building and the foundation 3. In FIG. 1A, the absorption of the vertical movement is due to the action of the rotating part. Absorption of the movement in the left-right direction is due to the action of the rotating part. Absorption of the movement in the front-rear direction (the direction perpendicular to the paper surface) is due to the action of the rotating unit. Absorption of the movement in the rotation direction (the rotation direction with the vertical direction as the rotation axis) is due to the action of the rotation unit.

A second embodiment of the present invention will be described with reference to FIG. The seismic piping device 26 is composed of five rotating parts, a plurality of straight pipe parts, and a plurality of curved pipe parts. Each of these pipes is fixedly or rotatably connected and has a deformable dog leg shape. It is provided between the fixed pipe 4 of the foundation 3 and the fixed pipe 5 of the building 1.

The fixed pipe 4 of the foundation 3 has three curved pipes 2.
7, 28 and 29 are connected in order. 2 from the foundation 3 side
Rotating portions are provided at two positions on both ends of the curved tube 28, respectively. A short straight pipe 32 is connected via a curved pipe 31 to an upper end of a lower long straight pipe 30 fixed to the curved pipe 29. The fixed pipe 5 of the building 1 has three curved pipes 3
3, 34 and 35 are connected in order. 2 from building 1 side
Rotating portions are provided at two positions on both ends of the main curved tube 34, respectively. A short straight pipe 38 is connected to the lower end of the upper long straight pipe 36 fixed to the bent pipe 35 via a bent pipe 37. A rotating part is provided between the two short straight pipes 32 and 38. The rotating part of the present example is the same rotatable joint 20 as in the first example.

The earthquake-resistant piping device 26 of the present embodiment absorbs relative movement between the building 1 and the foundation 3. In FIG. 2A, the movement in the vertical direction is absorbed by the action of the rotating parts.
Absorption of horizontal movement is due to the action of the rotating parts. Absorption of movement in the front-rear direction (perpendicular to the plane of the paper) is due to the action of the rotating part.

A third embodiment of the present invention will be described with reference to FIG. This seismic piping device 46 is composed of three rotating parts, a plurality of straight pipe parts, and a plurality of curved pipe parts. Each of these pipes is fixedly or rotatably connected and has a deformable dog leg shape. It is provided between the fixed pipe 4 of the foundation 3 and the fixed pipe 5 of the building 1.

The fixed pipe 4 of the foundation 3 has two curved pipes 4
7 and 48 are connected in order, and a rotating portion is provided between the two curved tubes 47 and 48. A curved pipe 50 is connected to the upper end of a long straight pipe 49 on the lower side fixed to the second curved pipe 48 from the foundation 3 side. In the fixed pipe 5 of the building 1, 2
The two curved tubes 51 and 52 are connected in sequence, and both curved tubes 5
A rotating section is provided between the first and second sections. The long straight pipe 53 on the upper side fixed to the second curved pipe 52 from the building 1 side
A curved tube 54 is connected to the lower end of the tube. Each curved tube 50,5
Reference numeral 4 is connected via a rotating unit. The rotating part of the present example is the same rotatable joint 20 as in the first example.

The earthquake-resistant piping device 46 of this embodiment absorbs relative movement between the building 1 and the foundation 3. In FIG. 3A, the movement in the vertical and horizontal directions is absorbed.

A fourth embodiment of the present invention will be described with reference to FIG. This earthquake-resistant piping device 56 is composed of three rotating parts, a plurality of straight pipe parts, and a plurality of curved pipe parts. Each of these pipes is fixedly or rotatably connected and has a deformable dog leg shape. It is provided between the fixed pipe 4 of the foundation 3 and the fixed pipe 5 of the building 1. The tip of the fixed pipe 5 on the building 1 side in this example is oriented in the horizontal direction.

The fixed pipe 4 of the foundation 3 has two curved pipes 5
7 and 58 are connected in order, and a rotating portion is provided between the two curved tubes 57 and 58. A curved pipe 60 is connected to an upper end of a lower long straight pipe 59 fixed to a second curved pipe 58 from the foundation 3 side. In the fixed pipe 5 of the building 1, 2
The two curved tubes 61 and 62 are connected in order, and both curved tubes 6 are connected.
A rotating part is provided between the first and second parts. An upper long straight pipe 63 fixed to a second curved pipe 62 from the building 1 side
A curved tube 64 is connected to the lower end. Each curved tube 60, 6
Reference numeral 4 is connected via a rotating unit. The rotating part of the present example is the same rotatable joint 20 as in the first example.

The earthquake-resistant piping device 56 of the present embodiment absorbs the relative movement between the building 1 and the foundation 3. In FIG. 4A, the movement in the vertical and horizontal directions is absorbed.

A fifth embodiment of the present invention will be described with reference to FIG. The structure of this earthquake-resistant piping device is the same as that of the first example, and the same reference numerals as those in FIGS. In this embodiment, the building itself is divided into upper and lower layers, and is composed of two parts, an upper building 80 as an upper structure and a lower building 81 as a lower structure. A plurality of second seismic isolation devices 82 are provided between the upper building 80 and the lower building 81 respectively.
It is installed via 3,84. That is, the seismic isolation device 82
Is installed between columns 84, 84 between an upper building 80 (upper floor) and a lower building 81 (lower floor). And the earthquake-resistant piping device 6 of this example is provided between the fixed piping 5 of the upper building 80 and the fixed piping 4 of the lower building 81. Since the earthquake-resistant piping device 6 of this example can absorb the relative movement between the upper building 80 and the lower building 81, the building shakes due to an earthquake or the like, and the positions of the upper building and the lower building are relatively shifted. When there is a deviation, there is no risk of damaging the piping.

A sixth embodiment of the present invention will be described with reference to FIG. The structure of this earthquake-resistant piping device is the same as that of the third example, and the same reference numerals as those in FIG. In this example, an earthquake-resistant pipe is provided between a building 1 built on a foundation 3 via a seismic isolation device 2 and another building 1a built on a foundation 3 via a seismic isolation device 2. A device 46 is provided. In the case of district heating / cooling, etc., steam or the like made in one building (for example, building 1) having an energy supply source may be distributed to another building (for example, building 1a). The earthquake-resistant piping device 46 of the present example is useful in such a case. Since both buildings 1.1a each have a seismic isolation device 2, they vibrate independently of each other during an earthquake,
The piping connecting the two is an earthquake-resistant piping device 46, which can absorb the relative movement between the two buildings 1 and 1a, so that there is no possibility that the piping will be damaged even if the building shakes due to an earthquake or the like. Incidentally, the earthquake-resistant piping device 6 can also be used.

[0027]

The seismic piping system for a base-isolated building according to the present invention has the following effects because it has a dog-leg shape having a plurality of rotating parts. High mechanical strength and pressure resistance of rotating part. Small mounting space due to dog leg shape. Ancillary equipment such as a tilt prevention guide and a slide stand are not required. Since the rotational force is small, the reaction force at the fixed point is small.

[Brief description of the drawings]

FIG. 1 (a) is a front view of a first example of an embodiment of the present invention. (B) It is the same side view.

FIG. 2A is a front view of a second example of the embodiment of the present invention. (B) It is the same side view.

FIG. 3A is a front view of a third example of the embodiment of the present invention. (B) It is the same side view.

FIG. 4A is a front view of a fourth example of the embodiment of the present invention. (B) It is the same side view.

FIG. 5 is a half sectional view of a joint according to the first embodiment of the present invention.

FIG. 6A is a diagram showing the structure of a base-isolated building. (B)
It is a figure showing the 1st example of an earthquake-resistant piping device provided in a base-isolated building.

FIG. 7 is a diagram showing a seismic isolation building and an earthquake-resistant piping device according to a fifth embodiment of the present invention.

FIG. 8 is a diagram illustrating a seismic isolation building and a seismic pipe system according to a sixth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Building as an upper structure 2,82 Seismic isolation device 3 Foundation as a lower structure 4 Fixed piping on the foundation side as a structure 5 Fixed piping on the building side as a structure 6,26 , 46, 56 Seismic piping device 20 Joint as rotating part 23 Ball 8, 9, 10, 12, 14, 15, 16, 18, 27,
28, 29, 31, 33, 34, 35, 37, 47, 4
8,50,51,52,54,57,58,60,6
1,62,64 curved pipes 7,11,13,17,19,30,32,36,4
9, 53, 59, 63 Straight pipe,,, rotating part 80 Upper building as upper structure 81 Lower building as lower structure

Claims (5)

[Claims] Claims: 1. An earthquake is provided between a first structure and a second structure which relatively move via an isolation device during an earthquake,
Seismic isolation system for seismic isolation building consisting of multiple straight pipe sections, multiple curved pipe sections, and multiple rotatable joints. 2. The seismic pipe system for a seismic isolation building according to claim 1, wherein the building as the first structure is installed on the foundation as the second structure via the seismic isolation device. 3. An earthquake-resistant building for a seismic isolation building according to claim 1, wherein the upper building as the first structure is installed on the lower building as the second structure via the seismic isolation device. Plumbing equipment. 4. The seismic piping device for a seismic isolation building according to claim 1, wherein the first structure and the second structure are respectively built on a foundation via the seismic isolation device. 5. The seismic isolation building according to claim 1, wherein said joint is a rotatable joint having a double row of ball races and a plurality of balls held by each of said ball races. For seismic piping equipment.