JP2016109214A - Gas holder and modification method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas holder which provides a seismic isolation function without adding significant change to a structure.SOLUTION: In a gas holder, an internal space of a cylindrical container 2 is divided by a piston 3 which moves up or down in a vertical direction and a space above or below the piston is used as a storage space 4 for storing a gas. The piston 3 includes: an annular foot ring 13 having balance concrete 15; a piston deck 12 supported by the foot ring 13; and a seismic isolation mechanism 30 provided in a housing space S formed in the balance concrete 15.SELECTED DRAWING: Figure 3

Description

  The present invention divides the inside of a cylindrical container of a predetermined shape vertically by a shield called a piston that can be slid up and down, and a space above or below the shield for storing gas The present invention relates to a gas storage facility provided as a storage space.

  A gas holder as a gas storage facility of this type includes a cylindrical container having a cylindrical outer shell structure, and a piston (shielding body) that divides the interior of the cylindrical container up and down, and is formed below the piston. The gas supplied from the gas inlet / outlet pipe is stored in the storage space. The stored gas can be discharged through a gas inlet / outlet pipe.

In order to secure earthquake resistance against earthquakes, gas holders have been subjected to earthquake-proof reinforcement measures such as structural reinforcement (for example, Patent Document 1).
However, in recent years, the possibility of larger earthquakes has been pointed out, and the level of ground motion that should be considered in design has increased. For this reason, the level of earthquake resistance required for the gas holder is also high, and applying the seismic reinforcement measures as described above results in a large reinforcing structure, resulting in a high cost and a problem. Therefore, there is a demand for measures that improve earthquake resistance with inexpensive measures. As an example of the countermeasure, there is a proposal to provide a base part with a seismic isolation mechanism that blocks earthquake input energy without reinforcing existing structural members (for example, Patent Document 2).

Japanese Patent Laid-Open No. 2005-289483 Japanese Patent Laid-Open No. 11-13068

However, since the seismic isolation mechanism generally supports vibration support by softly supporting the entire target structure, it is necessary to softly support the entire structure of the gas holder, which can be a large-scale construction and can further increase the cost. There is sex.
Then, an object of this invention is to provide the gas holder which can give a seismic isolation function, without adding a big change to a structure.

  The present invention made for this purpose is a gas holder in which the inside of a cylindrical container is partitioned by a piston that can be moved up and down, and the space above or below the piston serves as a storage space for storing gas. The piston includes an annular foot ring having balance concrete, a piston deck supported by the foot ring, and a seismic isolation mechanism provided in the balance concrete.

In this invention, at least two forms are included as a position of the balance concrete which provides a seismic isolation mechanism.
In the first form, an accommodation space is provided in the balance concrete, and a seismic isolation mechanism is provided inside the accommodation space. In the case of a new gas holder, the accommodation space may be formed in balance concrete in advance, and in the case of an existing gas holder, the accommodation space may be formed by winding balance concrete.
In the second form, a seismic isolation mechanism is provided on balance concrete. When this form is applied to an existing gas holder, it is preferable to form a curled portion in the balance concrete corresponding to the weight of the seismic isolation mechanism.

In the gas holder of the present invention, the seismic isolation mechanism can include a movable mass provided so as to be reciprocally movable along the radial direction of the foot ring, and a damping device that imparts a restoring function and a damping function to the movable mass.
In the present invention, the seismic isolation mechanism can include a movable mass provided so as to be reciprocally movable along the circumferential direction of the foot ring, and a damping device that imparts a restoring function and a damping function to the movable mass.

  In the present invention, it is preferable that the plurality of storage spaces are provided in the circumferential direction of the foot ring and the seismic isolation mechanism is provided in each of the divided storage spaces. In this case, the movable masses adjacent in the circumferential direction can be directly connected by the attenuation device.

  The present invention can be applied to an existing gas holder in addition to a newly installed gas holder. That is, in the present invention, the inside of the cylindrical container is partitioned by a piston that can be moved up and down, and an existing gas holder is provided with a seismic isolation mechanism in which the space above or below the piston serves as a storage space for storing gas. A method for repairing a gas holder is provided. In this modification method, the piston in the existing gas holder is provided with an annular foot ring having a balance concrete and a piston deck supported by the foot ring. A seismic mechanism is provided.

According to the present invention, since the seismic isolation mechanism is provided in the foot ring, the seismic response of the piston can be significantly reduced. In addition, since the movable mass exists in the seismic isolation mechanism, it is possible to secure the weight necessary for the piston.
On the other hand, the seismic isolation mechanism only needs to be provided in the foot ring which is a part of the structure of the gas holder, and it is not necessary to modify the other structure of the gas holder or add a new structure. Therefore, even when the seismic isolation mechanism is provided in any of the existing and new gas holders, the cost can be reduced.

It is a front view which shows the gas holder which concerns on 1st Embodiment. It is a figure which shows the schematic structure of the longitudinal cross-section of the gas holder of FIG. It is sectional drawing which shows the seal part of the piston of the gas holder of FIG. It is a figure which shows the schematic structure of the cross section of the gas holder of FIG. The foot ring of the gas holder which concerns on 2nd Embodiment is shown, (a) is a top view, (b) is a side view. 5 shows a modification of the foot ring of FIG. 5, (a) is a plan view, and (b) is a side view. It is a figure which shows the procedure which provides a seismic isolation mechanism in the existing foot ring. A part of piston of the gas holder which concerns on 2nd Embodiment is shown, (a) is sectional drawing in alignment with the circumferential direction Y, (b) is the sectional view on the AA line of (a).

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
[First Embodiment]
As shown in FIGS. 1 and 2, the gas holder 1 according to the present embodiment includes a cylindrical container 2 having a cylindrical outer shell structure, and a piston 3 that partitions the interior of the cylindrical container 2 up and down. The gas supplied from the gas inlet / outlet pipe 5 is stored in the storage space 4 formed below the piston 3, and the stored gas can be discharged through the gas inlet / outlet pipe 5. The basic configuration of the gas holder 1 is also followed in a second embodiment described later.
The cylindrical container 2 includes a side wall portion 7, and the side wall portion 7 is erected between a base column 8 erected at a predetermined interval so as to surround an installation target position of the gas holder 1 and the base columns 8. At the same time, the side plate 9 is disposed with the plate surface facing the inside of the cylindrical container 2.

  The piston 3 is formed in a disc shape when seen in a plan view, and can be moved up and down along the inner wall surface 7a of the side wall portion 7. The lift position (vertical position) is a gas to the storage space 4. It changes according to the inflow and outflow. Further, around the piston 3, the space between the piston 3 and the inner wall surface 7a of the side wall portion 7 is sealed to prevent gas leakage from the storage space 4, and the piston 3 can slide smoothly up and down. A seal portion 10 for guiding the piston 3 is provided.

As shown in FIG. 3, the piston 3 is formed in a dome shape with a piston deck 12 stretched on a frame that is combined with a beam in a circumferential direction and a radial direction. In order to adjust the weight of the piston 3, the balance concrete 15 is filled in the foot ring 13 provided in the circumferential direction on the outer edge of the piston 3. The foot ring 13 and the balance concrete 15 are elements constituting the seal portion 10. The piston 3 descends by its own weight and rises by the gas pressure of the gas g stored in the gas holder 1 below the piston 3, but by adjusting the weight of the piston 3 mainly by the balance concrete 15, the gas g The gas pressure is adjusted to a predetermined pressure.
A support frame 17 is fixed on the upper surface of the piston 3. The support frame 17 abuts against the inner wall surface 7 a of the side wall portion 7 and travels along the inner wall surface 7 a of the side wall portion 7. A guide roller 20 is attached to play a role of guiding up and down. As shown in FIG. 4, the gas holder 1 is provided with a plurality (24 in this embodiment) of guide rollers 20 with an equal interval in the circumferential direction of the piston 3.

  A ring-shaped receiving base 22 is fixed to the lower outer periphery of the foot ring 13, a canvas 23 curved upward is attached to the outer peripheral part of the receiving base 22, and a seal ring 24 is fixed to the upper end thereof. The seal ring 24 is suspended and supported by a seal hanger 25. A seal member 26 having a structure in which a wood 26 a is held between upper and lower rubber members 26 b and 26 c is attached to the outer peripheral surface of the seal ring 24. The seal member 26 is pressed against the inner wall surface 7a of the cylindrical container 2 by the link mechanism 27 and the counter weight 28, so that the seal oil 29 is stored and sealed above.

The gas holder 1 according to the present embodiment includes a seismic isolation mechanism 30 in the seal portion 10.
As shown in FIG. 3, the seismic isolation mechanism 30 is provided in an accommodation space S that is a gap formed by partially squeezing the balance concrete 15 of the foot ring 13. As shown in FIG. 4, the accommodation space S is formed at a plurality of locations (12 locations in the present embodiment) at equal intervals in the circumferential direction of the foot ring 13. Twelve places, that is, seismic isolation mechanisms 30 are provided corresponding to the guide rollers 20 and the base pillars 8 as shown in FIGS. 3 and 4. The housing space S includes an outer wall 15A provided outside the radial direction X, a pair of side walls 15B provided at intervals in the circumferential direction Y, and a bottom wall 15C provided below the vertical direction Z. , And is generally in the form of a rectangular parallelepiped. In addition, the balance concrete 15 has normally comprised the ring-shaped form which a vertical cross section makes a rectangle in the whole region of the circumferential direction (refer Fig.7 (a)).

As shown in FIG. 3, the seismic isolation mechanism 30 is provided between a movable mass 31, a slide guide 33 that supports the movable mass 31 so as to be capable of reciprocating in the radial direction X, and the movable mass 31 and the outer wall 15A. And an attenuation device 35 for connecting the two.
Here, the movable mass 31 is composed of a rectangular parallelepiped concrete member having a size accommodated in the accommodation space S. The movable mass 31 is supported by the slide guide 33, and can reciprocate in the horizontal direction and in the radial direction X. The form of the storage space S in which the movable mass 31 and the movable mass 31 are accommodated is arbitrary as long as it fulfills its function.
The slide guide 33 is not particularly limited as long as the movable mass 31 has a function of flexibly supporting the movable mass 31 so as to perform a desired movement. For example, a pair of rails along the radial direction X are connected to the circumferential direction Y. (FIG. 4) is provided with a predetermined interval, and includes a slider that slides on the rail.
The damping device 35 has both a restoring function that returns the position of the moving movable mass 31 and a damping function that attenuates the energy of the moving movable mass 31, and includes a spring element 35A and a damper element 35B. . For example, a coil spring can be used as the spring element 35A, and an oil damper can be used as the damper element 35B. However, it does not prevent other members and equipment from being used.

  When the gas holder 1 receives vibration, the seismic isolation mechanism 30 moves the movable mass 31 in the radial direction X along with the vibration, and attenuates vibration energy generated by the movement of the movable mass 31 to the damping device 35. As shown in FIG. 4, the gas holder 1 of the present embodiment is provided with twelve seismic isolation mechanisms 30 at equal intervals in the circumferential direction Y. For example, when the gas holder 1 vibrates in a specific radial direction X <b> 1. When a pair of seismic isolation mechanisms 30 (enclosed by a solid line) in a symmetrical position function and the gas holder 1 vibrates in a specific radial direction X2, a pair of seismic isolation mechanisms 30 (broken lines in a symmetrical position) Function). In this way, the gas holder 1 can effectively attenuate the vibration in any radial direction X1, X2, X3.

[Installation procedure of seismic isolation mechanism 30]
The procedure for installing the seismic isolation mechanism 30 in the foot ring 13 will be described with reference to FIG.
This procedure assumes that the seismic isolation mechanism 30 is provided in the existing gas holder 1, and the balance concrete 15 is a ring in which the entire circumferential direction (Y) is solid as shown in FIG. It has a shape of a shape.
An accommodation space S is formed on the balance concrete 15 as shown in FIG. The accommodation space S is provided at a plurality of locations in the circumferential direction Y according to the number of the seismic isolation mechanisms 30 provided.
If the accommodation space S is formed, as shown in FIG. 7C, the separately prepared movable mass 31, slide guide 33, and attenuation device 35 are arranged at predetermined positions in the respective accommodation spaces S. The seismic isolation mechanism 30 is installed. The movable mass 31 may be newly produced, or the balance concrete 15 that has been beaten may be reused.
In the present embodiment, it is allowed to provide the seismic isolation mechanism 30 in the newly installed gas holder 1, and in that case, as shown in FIG. 7B, if the accommodation space S is provided in the balance concrete 15 in advance. Good.

[Effect]
Next, the effect of the gas holder 1 according to the present embodiment will be described.
In this embodiment, the seismic isolation mechanism 30 is provided on the foot ring 13 (balanced concrete 15) of the piston 3.
Here, the piston 3 including the balance concrete 15 that is a heavy object has a high weight ratio of, for example, about 60% with respect to the entire gas holder 1. Therefore, the vibration of the piston 3 when the gas holder 1 is subjected to earthquake motion is It is extremely larger than the member of the gas holder 1. However, in this embodiment, since the seismic isolation mechanism 30 is provided in the foot ring 13, the earthquake response of the piston 3 can be significantly reduced. In addition, since the movable mass 31 exists in the accommodation space S in which the seismic isolation mechanism 30 is provided, the weight necessary for the piston 3 can be ensured.
On the other hand, since the seismic isolation mechanism 30 is provided in the foot ring 13 which is a part of the structure of the gas holder 1, it is sufficient to modify other structure parts of the gas holder 1 or add a new structure. Absent. Therefore, even when the seismic isolation mechanism 30 is provided in any of the existing and new gas holders 1, the cost can be suppressed.
As described above, according to the present embodiment, the gas holder 1 having the seismic isolation function capable of reducing the seismic response without greatly changing the structure is provided.

Moreover, in this embodiment, since the seismic isolation mechanism 30 is accommodated in the area | region of the longitudinal cross-section of the foot ring 13, it is not necessary to create the space for providing the seismic isolation mechanism 30 in the gas holder 1 anew.
Moreover, in this embodiment, since the seismic isolation mechanism 30 is provided in 12 places at equal intervals in the circumferential direction Y, an earthquake response can be reduced regardless of the direction of vibration in the radial direction X.
Furthermore, since each seismic isolation mechanism 30 is provided corresponding to the guide roller 20 and the base column 8, it is possible to receive the load due to the operation of the seismic isolation mechanism 30 as the cylindrical container 2.

Although the first embodiment has been described above, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.
For example, the seismic isolation mechanism 30 is provided intermittently in the circumferential direction Y across the side wall 15B, but can be provided continuously in the circumferential direction Y without providing the side wall 15B.
Further, the number 12 provided with the seismic isolation mechanism 30 is merely an example, and the seismic isolation mechanism 30 can be provided with less than 12 or more than 12. However, it is recommended to provide four seismic isolation mechanisms 30 at least at an interval of 90 ° in order to cope with the earthquake response. However, when vibration occurs only in a specific direction, the seismic isolation mechanism 30 can be provided only at a position corresponding to the direction.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The second embodiment is different from the first embodiment in that the movable mass 41 in the seismic isolation mechanism 40 is moved along the tangential direction of the foot ring 13 (hereinafter simply referred to as the tangential direction). The explanation will be focused on the point. The same components as those in the first embodiment will be described using the reference numerals used in the first embodiment.

As shown in FIG. 5, the seismic isolation mechanism 40 is provided between the movable mass 41, the slide guide 43 that supports the movable mass 41 so as to be reciprocally movable along the tangential direction, and the movable mass 41 and the side wall 15D. And an attenuation device 45 that connects the two.
The movable mass 41 includes a mass body 41A made of a partially annular concrete member as a main element in plan view. The movable mass 41 is supported by the slide guide 43 so that it can move back and forth horizontally and tangentially. The movable mass 41 includes a mass main body 41A and a support body 41B connected to the lower surface of the mass main body 41A. The support body 41B is formed with a smaller width than the mass body 41A in order to provide the attenuation device 45.
The movable mass 41 is provided between a pair of side walls 15D and 15D provided on both sides in the circumferential direction Y. The movable mass 41 reciprocates in the circumferential direction Y in the accommodation space S indicating between the pair of side walls 15D and 15D. Can move. In addition, the accommodation space S is formed with the bottom wall 15C by being crushed between the pair of side walls 15D and 15D. In the second embodiment, the portion of the outer wall 15A provided in the first embodiment is also beaten.

  The slide guide 43 is not particularly limited as long as the movable mass 41 has a function of flexibly supporting the movable mass 41 so as to perform a desired movement. For example, a pair of rails along the tangential direction are set in the radial direction X. And a slider that slides on the rail. Note that the movable mass 41 can be moved along the circumferential direction Y by using an arcuate slide guide having a curvature that matches the curvature of the foot ring 13. The present invention treats the tangential direction as being included in the circumferential direction.

  The damping device 45 includes a spring element 45A and a damper element 45B, as in the first embodiment. In the second embodiment, one damping device 45, 45 is provided on each side of the support body 41 </ b> B in the circumferential direction Y with respect to one movable mass 41. One attenuation device 45 connects the side wall 15D located on the left side in the figure and the support body 41B, and the other attenuation device 45 connects the side wall 15D located on the right side in the figure and the support body 41B.

When the gas holder 1 receives vibration, the seismic isolation mechanism 40 moves the movable mass 41 in the tangential direction along with the vibration, and attenuates vibration energy generated by the movement of the movable mass 41 to the damping device 45. As shown in FIG. 5, the gas holder 1 according to the second embodiment has vibration isolation effective in any radial direction X because the seismic isolation mechanisms 40 are provided at equal intervals along the circumferential direction Y. Can be attenuated.
If the seismic isolation mechanism 40 exhibits a damping function, the inertial reaction force received by the corresponding side walls 15D and 15D is transmitted to the cylindrical container 2 through the side walls 15D and 15D. It is preferable to consider the arrangement of the seismic isolation mechanism 40 so that the column 8 is provided.

The gas holder 1 provided with the seismic isolation mechanism 40 described above has the following effects in addition to the same effects as those of the first embodiment.
The seismic isolation mechanism 40 has a high degree of freedom in disposing the attenuation device 45 because the movable mass 41 moves in the tangential direction. That is, when the movable mass 31 moves in the radial direction X as in the first embodiment, the size of the balance concrete 15 in the radial direction X is limited. A space for providing the damping device 35 together with the movable mass 31 in S is limited. On the other hand, according to the second embodiment, since the circumferential direction Y of the balance concrete 15 that can create a larger space than the radial direction X can be used, the degree of freedom of installing the attenuation device 45 is high, and the attenuation device 45 Can be arranged efficiently.

In the second embodiment, it is optional to provide the side walls 15D and 15D. As shown in FIGS. 6A and 6B, the adjacent movable masses 41 and 41 are supported without the side walls 15D and 15D. The bodies 41 </ b> B and 41 </ b> B can also be connected by the attenuation device 45. If it does so, since the adjacent seismic isolation mechanism 40 can respond | correspond and can respond to an earthquake response, an earthquake response can be reduced more.
Further, the upper and lower arrangements of the mass main body 41A and the support body 41B can be alternately arranged as shown in FIG. If it does so, it can avoid that the adjacent movable masses 41 and 41 interfere.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. In FIG. 8, the same components as those in FIG. 3 are denoted by the same reference numerals as those in FIG. 3, and some components in FIG. 3 are omitted.
The main point of the third embodiment is to provide the seismic isolation mechanism 50 on the balance concrete 15 of the foot ring 13.
Similar to the seismic isolation mechanism 30 of the first embodiment, the seismic isolation mechanism 50 includes a movable mass 51, a slide guide 33 that supports the movable mass 51 so as to reciprocate in the tangential direction, and the movable mass 51 and the outer wall 15E. And an attenuation device 55 that is provided between the two and connects the two. The damping device 55 includes a spring element 55A and a damper element 55B.

  As the seismic isolation mechanism 50 is provided, the punching gap (turning portion) S is formed. Here, an existing gas holder is assumed. The turning gap S has a volume corresponding to the weight of the seismic isolation mechanism 50. By doing so, it is desired not to change the total weight of the piston 3 including the balance concrete 15. The weight corresponding to the weight of the seismic isolation mechanism 50 does not need to be completely equal to that of the seismic isolation mechanism 50, and increases and decreases within a range in which normal operation of the piston 3 is ensured after the seismic isolation mechanism 50 is installed. Is acceptable.

Also in the third embodiment, since the seismic isolation mechanism 50 is provided in the foot ring 13 (balanced concrete 15), the seismic isolation function capable of reducing the seismic response can be reduced without making a major change to the structure, as in the first embodiment. A gas holder can be provided.
The accommodation space S of the first embodiment needs to have a shape and dimensions that can accommodate the seismic isolation mechanism 30, but the clearance gap S of the third embodiment only needs to correspond to the weight of the seismic isolation mechanism 50. The shape and dimensions necessary to accommodate the seismic isolation mechanism 50 are not affected. Therefore, the third embodiment increases the degree of freedom of installation compared to the first embodiment.

Although FIG. 8 shows an example in which the pair of the seismic isolation mechanism 50 and the ring gap S is one, in the present invention, the number of the seismic isolation mechanism 50 and the ring gap S is arbitrary, for example, in the first embodiment. As shown in the form, a plurality of seismic isolation mechanisms 50 and turning gaps S can be provided in the circumferential direction of the balance concrete 15.
Further, the seismic isolation mechanism 50 only needs to include a damping device 55 that is supported so that the movable mass 51 can reciprocate in the horizontal direction with respect to the foot ring 13 and connects the two, and is limited to the form of FIG. Not. The damping device 55 also includes a spring element 55A and a damper element 55B.

DESCRIPTION OF SYMBOLS 1 Gas holder 2 Cylindrical container 3 Piston 4 Storage space 5 Gas inlet / outlet pipe 7 Side wall part 7a Inner wall surface 8 Base pillar 9 Side plate 10 Seal part 12 Piston deck 13 Foot ring 15 Balance concrete 15A Outer wall 15B Side wall 15C Bottom wall 15D Side wall 17 Support frame 20 Guide roller 22 Receiving base 23 Canvas 24 Seal ring 25 Seal hanger 26 Seal member 27 Link mechanism 28 Counterweight 29 Seal oil 30, 40, 50 Seismic isolation mechanism 31, 41, 51 Movable mass 33, 43 Slide guides 35, 45 , 55 Damping device 35A, 45A, 55A Spring element 35B, 45B, 55B Damping element 41A Mass body 41B Support

Claims (8)

A gas holder that divides the inside of the cylindrical container by a piston that can be moved up and down, and a space above or below the piston is a storage space for storing gas,
The piston is
An annular foot ring with balanced concrete;
A piston deck supported by the foot ring;
A seismic isolation mechanism provided in the balance concrete;
A gas holder comprising: The seismic isolation mechanism is
Provided inside the accommodation space provided in the balance concrete,
The gas holder according to claim 1. The seismic isolation mechanism is
Provided on the balance concrete,
The balance concrete is
A turning portion corresponding to the weight of the seismic isolation mechanism is formed,
The gas holder according to claim 1. The seismic isolation mechanism is
A movable mass provided so as to be capable of reciprocating along the radial direction of the foot ring;
A damping device for providing a restoring function and a damping function to the movable mass,
The gas holder as described in any one of Claims 1-3. The seismic isolation mechanism is
A movable mass provided to be capable of reciprocating along the circumferential direction of the foot ring;
A damping device for providing a restoring function and a damping function to the movable mass,
The gas holder as described in any one of Claims 1-3. The plurality of storage spaces are provided separately in the circumferential direction of the foot ring,
The seismic isolation mechanism is provided in each of the divided storage spaces.
The gas holder according to any one of claims 2, 4 and 5. The movable masses adjacent in the circumferential direction are connected by the attenuation device,
The gas holder according to claim 5. Renovation of the gas holder, in which the inside of the cylindrical container is partitioned by a piston that can be moved up and down, and a seismic isolation mechanism is provided in an existing gas holder in which the space above or below the piston serves as a storage space for storing gas A method,
The piston in the existing gas holder is
An annular foot ring with balanced concrete;
A piston deck supported by the foot ring,
A seismic isolation mechanism is provided in the accommodation space formed by rolling the balance concrete.
A gas holder repair method characterized by the above.

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