JP2015206439A - Tilt suppression device for gas holder piston - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilt suppression device for a gas holder piston capable of being installed without performing welding work for the holder body, and capable of suppressing collision or tilt of the piston to the holder body during a big earthquake.SOLUTION: A tilt suppression device includes a plurality of guide frames erected on an outer peripheral upper surface of a piston 15 along a circumferential direction of the piston 15, an upper contact guide roller 32A and a lower contact guide roller 32B respectively disposed on an upper end and a lower end of the guide frame and arranged to be rolled in a vertical direction Y in a state of being brought into contact with a side wall inner surface 14a of a holder body 10, and a non-contact guide roller 33 disposed in a lower side of the piston 15 and at a lower portion than a position of the center of gravity G of the piston 15 and arranged to be rolled in the vertical direction in a state of being separated from the side wall inner surface 14a.

Description

  The present invention relates to a tilt suppression device for a gas holder piston.

Conventionally, many gas holders provided in steelworks are designed on the basis of a seismic design level of seismic intensity 6. Therefore, reinforcement measures such as seismic reinforcement, seismic isolation reinforcement, and vibration suppression reinforcement are being taken as countermeasures for large-scale earthquakes exceeding seismic intensity 6.
As the seismic reinforcement, reinforcement that increases the rigidity by welding a steel frame to the outer periphery of the holder main body and the roof is common. In the case of seismic isolation reinforcement, an underground part of the foundation of a structure (gas holder) is excavated and a base isolation device such as laminated rubber is incorporated in the underground space (for example, see Patent Document 1). . Furthermore, in the case of vibration suppression reinforcement, a frame, a foundation, a pile, and the like are newly installed on the gas holder, and a vibration damper is incorporated using these (for example, see Patent Document 2). .

  As another seismic reinforcement, for example, a method of providing a device for controlling the inclination of the piston of the gas holder as described in Patent Document 3 is known. Patent Document 3 includes three or more liquid chambers installed on a control piston, a communication pipe that connects the liquid chambers to each other and circulates the liquid, an inclination sensor that controls the inclination of the piston, and an inclination sensor. And a pressure adjusting means for adjusting the amount of liquid in the liquid chamber by adjusting the internal pressure of the liquid chamber based on the signal of the piston, and a piston tilt control device configured to restore the tilt generated by moving the liquid Is described.

JP 2012-177282 A JP 2010-203192 A JP 2006-17152 A

However, the conventional gas holder reinforcement structure has the following problems.
In other words, in the case of seismic reinforcement in which the holder body is reinforced with steel frames, or in the case of vibration suppression reinforcement with a vibration damper, welding work is required, so it is necessary to stop the operation of the gas holder during the welding work period. is there. Furthermore, there is a possibility that the vertical accuracy tolerance (1 / 10,000) may be exceeded due to welding distortion, and the operation of the gas holder may be stopped.
Also, in the case of seismic isolation, it was necessary to stop the operation of the gas holder for a long time during underground excavation and installation of the seismic isolation device, and there was room for improvement in that respect.

 Furthermore, in the piston tilt control device shown in Patent Document 3, the tilt of the piston during normal operation is reduced, and the tilt of the piston is detected by the tilt sensor, and the liquid in the liquid chamber is moved by the pressure adjusting means. The control takes time. In other words, there is a problem in that the followability with respect to the tilt motion that changes every moment as in an earthquake is low, and sufficient tilt control cannot be performed. For this reason, the collision force of the piston against the holder main body is increased, and there is a risk of destroying the seal portion of the piston.

  The present invention has been made in view of the above-described problems, and can be installed without performing welding work on the holder main body, and can suppress collision and inclination of the piston to the holder main body during a large earthquake. An object of the present invention is to provide a tilt suppression device for a gas holder piston.

  In order to achieve the above object, the tilt suppression device for a gas holder piston according to the present invention is a tilt suppression device for suppressing the tilt of the piston of the gas holder, and is erected on the outer peripheral upper surface of the piston. A plurality of guide frames are provided along the circumferential direction of the piston, and the guide frames are arranged on each of the upper and lower ends of the guide frame and rolled up and down in contact with the inner wall of the holder body of the gas holder. A contact guide roller that is movably provided, and a non-contact roller that is disposed below the piston and below the center of gravity of the piston and is capable of rolling up and down in a state of being separated from the inner surface of the side wall. And a contact guide roller.

In the present invention, since a plurality of contact guide rollers that contact the inner surface of the side wall are provided on the guide frame on the piston along the circumferential direction, the movement of the piston in the horizontal direction is restricted during normal operation, and the piston and the side wall And the distance between them is kept constant.
In the event of an earthquake, the seismic force is transmitted from the ground to the side wall of the holder body, the tilting motion is transmitted from the side wall to the piston, and the piston rotates and tilts around the piston tilt center in plan view. At this time, since the non-contact guide roller is disposed below the piston and below the center of gravity of the piston, the contact guide roller (upper portion) provided at the upper end of the guide frame at the lower portion when the piston is tilted. The contact guide roller) collides with the side wall, and the non-contact guide roller located at the diagonal (upper portion of the tilted piston) comes into close contact with the diagonal side wall. That is, a reaction force against the tilting force acting on the piston is generated at the position where the non-contact guide roller contacts the piston. Therefore, the tilting motion (inclination response) of the piston can be reduced, excessive collision of the upper contact guide roller can be suppressed, and the collision force can be suppressed.

  Thus, in the tilt suppression device according to the present invention, even when a large-scale earthquake exceeding seismic intensity 6 occurs, the tilt response of the piston inside the gas holder can be suppressed, so by the collision of the piston with the holder body, The steel frame of the holder body breaks, the compression of the column base becomes excessive, the base column buckles, the pile head of the pile that supports the gas holder plasticizes, and the inertial force position of the piston and the collision reaction The force position shifts, the piston is inclined inside the gas holder, the oil seal is cut between the holder main body and the piston, the gas leaks from that portion, and the conventional problem that the piston falls can be eliminated.

  Further, according to the present invention, since the non-contact guide roller is provided for the piston, the construction period can be shortened. In particular, when a non-contact guide roller is provided for the purpose of reinforcing an existing gas holder, the stop period of the gas holder can be shortened, and the influence of operation can be minimized.

In addition, since a tilt restraining device such as a non-contact guide roller is attached to the piston, it is a reinforcement that does not weld directly to the holder body, preventing welding distortion from occurring in the holder body, and allowing for vertical accuracy tolerance. The value can be secured.
Furthermore, the tilt suppressing device of the present invention is a mechanism that mechanically reduces the tilt, and has an advantage that it is not necessary to provide an electrical wiring in the air in the gas holder.

  Moreover, in the inclination suppression apparatus of the gas holder piston which concerns on this invention, it is preferable that the said non-contact guide roller is provided via the damping device with respect to the said piston.

  In this case, since the damping action by the vibration control device works when the non-contact guide roller and the side wall are in contact, the tilt response of the piston can be reduced more effectively, and the reaction force when the piston contacts the holder body Can be reduced.

  According to the tilt suppression device for a gas holder piston of the present invention, it can be installed without performing a welding operation on the holder body, and the collision and tilt of the piston with the holder body during a large earthquake can be suppressed.

It is a judgment surface perspective view of a gas holder provided with the inclination control device by an embodiment of the invention. It is a sectional side view of the gas holder shown in FIG. It is a figure which shows the arrangement | positioning state of an inclination suppression apparatus, Comprising: It is the top view which looked at the piston from the upper side. It is a side view which shows schematic structure of an inclination suppression apparatus. (A), (b) is a side view for demonstrating the effect | action of the piston at the time of normal operation. (A), (b) is a side view for demonstrating the effect | action of the piston at the time of an earthquake. It is a figure which shows the implementation result of the inclination suppression apparatus before installation of a non-contact guide roller, Comprising: (a) is a figure which shows an analysis result, (b) is a figure which shows the inclination log | history of a piston. It is a figure which shows the implementation result of the inclination suppression apparatus provided with the non-contact guide roller, Comprising: (a) is a figure which shows an analysis result, (b) is a figure which shows the inclination log | history of a piston.

  Hereinafter, an inclination suppression device for a gas holder piston according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the gas holder 1 according to the present embodiment provides seismic reinforcement in accordance with a set seismic intensity (assuming a seismic intensity of 7 here) with respect to an existing gas holder 1 provided in a predetermined area. It is applied to the piston 15 and reinforced so as to reduce the tilting movement (response) of the piston 15.

  As shown in FIGS. 1 and 2, the gas holder 1 includes a bottom plate 11, base pillars 12 arranged on the bottom plate 11 at intervals along the circumferential direction E, and the circumferential direction E. The lateral beam 13, the side wall 14 that closes the space surrounded by the base column 12 and the horizontal beam 13, the piston 15 that is slidable in the vertical direction Y along the inner surface of the side wall, and the upper end 12 a of the base column 12. And a provided roof member 16. Here, in the gas holder 1, the bottom plate 11, the base 12, the cross beam 13, the side wall 14, and the roof member 16 excluding the piston 15 will be hereinafter referred to as a holder body 10.

The base column 12 is made of, for example, H-shaped steel, and is erected on the bottom plate 11, and a unit of a predetermined length unit is added along the vertical direction Y.
The roof member 16 has an inverted hook shape extending downward in the radial direction from the center in plan view, and the outer peripheral portion thereof is joined to the upper end 12 a of the base column 12.

  The piston 15 provided inside the gas holder 1 is a partition wall that divides the inside of the gas holder 1 up and down, and an outer peripheral portion 15a thereof extends, for example, through a rubber seal material (not shown) over the entire circumference in the circumferential direction E. And sealed in a liquid-tight state against the inner surface of the side wall. The contact surface of the sealing material with the inner surface of the side wall is filled with oil and sealed with a liquid film of this oil. The piston 15 is formed in a curved surface that protrudes upward from the outer periphery toward the center in plan view.

The space below the piston 15 is a gas filled space R <b> 1 sealed by the bottom plate 11, the side wall 14, and the piston 15. The piston 15 is configured to be slidable in the vertical direction Y along the inner surface of the side wall by changing the internal pressure by flowing gas into or out of the gas sealed space R1. For example, the piston 15 rises by making the levitation force generated by the pressure in the gas filled space R <b> 1 larger than the weight of the piston 15. That is, the piston 15 can be maintained at a predetermined height by keeping the pressure in the gas filled space R1 constant. The upper space R2 between the piston 15 and the roof member 16 is not sealed and is an open space.
A concrete outer peripheral wall 15 </ b> A is provided along the circumferential direction E on the lower surface of the outer peripheral portion of the piston 15.

  The side wall 14 is an arc plate-like body formed of a steel material having a curvature divided into a plurality along the circumferential direction E and the vertical direction Y, and is attached between the base columns 12 and 12 by welding. ing.

  As shown in FIG. 3, the piston upper surface 15 b has a plurality of horizontal motion damping devices 2, 2,... For controlling the horizontal movement of the piston 15 and a plurality of inclinations for suppressing the tilting movement of the piston 15. Suppressors 3, 3,... Are provided.

  Four horizontal motion damping devices 2 are arranged at the outer peripheral portion of the piston upper surface 15b at a pitch of 90 degrees in the circumferential direction E, and are configured by a known response-controllable damping portion, spring portion, and mass portion. A TMD (tuned mass damper) can be employed, and is a control device for reducing the horizontal response (horizontal movement) of the piston 15.

  As shown in FIG. 4, the inclination suppressing device 3 is provided on the outer peripheral portion of the piston upper surface 15 b of the piston 15, and a plurality of guides provided at intervals along the circumferential direction E (see FIG. 3). A contact guide roller 32 (upper contact guide) is provided on each of the upper end and the lower end of the frame 31 and the guide frame 31 so as to be able to roll in the vertical direction Y while being in contact with the side wall inner surface 14a of the gas holder 1. A roller 32A, a lower contact guide roller 32B), and a non-contact guide roller 33 disposed at the lower end of the piston 15 and provided so as to be able to roll in the vertical direction Y while being separated from the side wall inner surface 14a. Yes.

  The guide frame 31 includes a support column 34 that extends upward in the vertical direction from the outer peripheral edge of the piston upper surface 15b, and an oblique member 35 that extends from the radial center side of the piston 15 toward the upper end 34a of the support column 34. It is equipped with. The diagonal members 35 are reinforced so that the support columns 34 do not tilt. The support column 34 and the diagonal member 35 are connected and reinforced by a plurality of reinforcing members 36. The support pillars 34 are arranged with a certain distance L between the outer side surface 34 c and the side wall 14.

The support pillar 34 is provided with an upper contact guide roller 32A provided at the upper end 34a via the first fixed base 32a, and a lower contact guide roller 32B provided at the lower end 34b via the second fixed base 32b. ing. When the upper contact guide roller 32A and the lower contact guide roller 32B are in contact with the inner surface 14a of the side wall 14a in a rollable manner as described above when the piston 15 is in a horizontal position (during normal operation), the normal contact operation is performed. In order to move the piston 15 up and down along the side wall inner surface 14a. Here, the time of normal operation means that a horizontal state in which no tilting motion is applied to the piston 15 as in an earthquake is maintained. The contact guide rollers 32A and 32B are made of steel.
Moreover, the space | interval of the up-down direction Y of 32 A of upper contact guide rollers and the lower contact guide roller 32B can be set suitably.

  The non-contact guide roller 33 is a contact guide in the circumferential direction E via a vibration damper (vibration control device) 37 below the outer peripheral wall 15A of the piston 15 and below the position of the piston center of gravity G of the piston 15. It is provided at the same position as the roller 32. Here, in FIG. 4, a horizontal line including the piston center of gravity G is indicated by a two-dot chain line.

  When the piston 15 is positioned horizontally during normal operation, the non-contact guide roller 33 is provided at a position spaced from the side wall inner surface 14a, that is, a position where the non-contact guide roller 33 is in a non-contact state. The distance L1 between the side wall inner surface 14a of the holder main body 10 and the non-contact guide roller 33 at this time can be suppressed to an allowable tilting movement within a tilting range of 1/500 of the management standard of the piston 15 during normal operation, for example. Further, the non-contact guide roller 33 is set so as to abut against the side wall 14 to generate a reaction force.

  The damping damper 37 has one end 37a in the damping direction F fixed to the inner peripheral side of the piston lower surface 15c, and the other end 37b connected to the outer peripheral side of the piston lower surface 15c via a fixing base 33a.

  The larger the number of the inclination suppressing devices 3 provided at intervals along the circumferential direction E, the better, but it can be set as appropriate.

Next, the effect | action of the inclination suppression apparatus 3 of the piston 15 mentioned above is demonstrated in detail based on drawing.
As shown in FIGS. 1 and 2, in the present embodiment, the upper contact guide roller 32 </ b> A and the lower contact guide roller 32 </ b> B that contact the inner surface of the side wall of the guide frame 31 (see FIG. 4) on the piston 15 are arranged in the circumferential direction E. Therefore, during normal operation, the movement of the piston 15 in the horizontal direction is restricted, and the distance between the piston 15 and the side wall 14 is kept constant (see FIG. 5A).

  Further, in the gas holder 1, the piston 15 is floated by gas pressure, and when seismic force is applied, the seismic force is transmitted from the ground to the side wall 14 of the holder main body 10, and further, the base pillar constituting the holder main body 10. 12 is shaken by the seismic force and a horizontal force is transmitted to the piston 15, that is, the piston 15 is excited by shaking the entire structure (gas holder 1).

First, the effect | action of the inclination suppression apparatus 3 at the time of normal operation is demonstrated based on FIG.
As shown in FIG. 5 (a), when the base column 12 is slightly tilted, the piston 15 meanders as it moves up and down, and a slight tilt occurs. In this case, as shown in FIG. 5B, the piston 15 is tilted around the center of the piston 15 (piston tilt center C) in plan view. At this time, it is assumed that the volume of the gas filled space R1 does not change.

The inclination at this time is 1/500 or less, which is the management standard, and is so small that the reaction force from the upper contact guide roller 32A is negligible. Similarly, the reaction force from the lower contact guide roller 32B can be ignored. That is, in this case, the moment Mc (Equation (1)) due to the gravity mg acts in the direction that cancels the tilt (the counterclockwise rotation direction around the piston tilt center C by the arrow shown in FIG. 5B). Inclination acting on the piston 15 can be suppressed. In equation (1), m is the mass of the piston 15, g is the gravitational acceleration, e is an eccentric distance indicating the distance between the piston tilt center C and the piston gravity center G, and θ is the tilt of the piston 15 around the piston tilt center C. Is an angle.
In order to maximize the tilt suppression force, it is only necessary to increase the expression (1), so the eccentric distance e is increased in the expression (1).

Next, the effect | action of the inclination suppression apparatus 3 at the time of an earthquake is demonstrated based on FIG.
As shown in FIG. 6 (a), in the event of an earthquake, the piston 15 collides with the cylinder (side wall inner surface 14a of the holder main body 10) at an acceleration a, so that an external force is applied to the piston 15 (the external force ma / of the upper contact guide roller 32A). 2 and the external force ma / 2 of the lower contact guide roller 32B) is input, and an inclination in the direction of rotating counterclockwise in FIG. At this time, the difference e ₂ between the reaction force height D (the horizontal height passing through the centers of the upper contact guide roller 32A and the lower contact guide roller 32B when the piston 15 is horizontal) and the piston gravity center (inertial force acting position) G. As a result, a moment Mc is generated, and the piston 15 tilts around the piston tilt center C (counterclockwise arrow shown in FIG. 6A). The moment Mc at this time is calculated | required by (2) Formula. Here, in equation (2), m is the mass of the piston 15, a is acceleration, e ₁ is the difference of the piston tilt center C and the reaction force height D.

As shown in FIG. 6B, when the inclination at this time exceeds 1/500 which is the management standard, the non-contact guide roller 33 comes into contact with the side wall inner surface 14a, and the reaction force ma is input. . That is, the reaction force ma from the non-contact guide roller 33 and the moment Mc due to the gravity mg work in a direction to cancel the inclination. Note that, at a position facing the position where the non-contact guide roller 33 is in contact with the side wall inner surface 14a (on the left side in FIG. 6B), the upper contact guide roller 32A and the lower contact guide roller 32B are instantaneously separated from the side wall inner surface 14a. Since they are separated, the external force is regarded as zero.
The moment Mc acting around the piston tilt center C at this time is expressed by the equation (3), and acts in a direction that cancels the tilt of the piston 15 (the direction of the clockwise arrow shown in FIG. 6B). In the equation (3), e ₁ ′ is the difference between the piston tilt center C and the piston gravity center G, and e ₂ ′ is the difference between the horizontal height passing through the non-contact guide roller 33 and the piston gravity center G.

In order to maximize the tilt suppression force, Mc = mae ₂ 'cosθ + mge ₁ ' sinθ in equation (3) may be increased. e ₁ ′ is equal to e during normal operation, and mge ₁ ′ sin θ has a very small tilt suppression force with respect to an assumed seismic force when the tilt angle θ is small.
On the other hand, mae ₂ 'cosθ is effective by increasing e ₂ ' because the tilt suppression force acts according to the earthquake acceleration.

Here, the inclination suppression effect of the inclination suppression device 3 of the present embodiment is also apparent from the FEM analysis results shown in FIGS. FIGS. 7A and 7B show a case where a non-contact guide roller is not provided (existing in the figure), and FIGS. 8A and 8B show the present embodiment provided with a non-contact guide roller. The case of the form (after the control in the figure) is shown. 7 (a) and 8 (a) are model views of the gas holder subjected to FEM analysis. FIGS. 7 (b) and 8 (b) show time and piston inclination angle (rad), respectively. ) Is a piston history showing the relationship. In the figure, EW indicates an inclination in the east-west direction, and NS indicates an inclination in the north-south direction.
Thereby, in EW, there is no big difference in the inclination angle between the existing case shown in FIG. 7 (b) and the case after the control shown in FIG. 8 (b). On the other hand, in NS, when the non-contact guide roller shown in FIG. 7B is not provided (existing), the maximum inclination angle after time t is approximately −0.008 rad. When the non-contact guide roller shown in FIG. 8B is provided (after control), the maximum inclination angle is approximately −0.002 rad, which is suppressed to about ¼ of the existing size. I understand that.

  In this embodiment, as shown in FIG. 1 and FIG. 2, during an earthquake, tilt movement is transmitted from the side wall 14 to the piston 15, and the piston 15 rotates around the piston tilt center C (see FIG. 6) in plan view. Tilt. At this time, since the non-contact guide roller 33 is disposed below the piston 15 and below the position of the center of gravity of the piston 15, the upper contact guide roller 32 </ b> A is disposed on the side wall 14 in the lower portion when the piston 15 is tilted. The non-contact guide roller 33 located on the diagonal (upper portion of the tilted piston 15) comes into close contact with the diagonal side wall 14. That is, a reaction force against the tilting force acting on the piston 15 is generated at the position where the non-contact guide roller 33 abuts on the piston 15. Therefore, the inclination movement (inclination response) of the piston 15 can be reduced, the excessive collision of the upper contact guide roller 32A can be suppressed, and the collision force can be suppressed.

  Further, in the present embodiment, not only the inclination suppressing device 3 but also the horizontal motion damping device 2 is provided, so that the horizontal movement of the piston 15 acting together with the rotation / tilting is also a horizontal damping action by the horizontal motion damping device 2. The reaction force when the piston 15 abuts against the holder body 10 can be reduced.

  Thus, in the present embodiment, even when a large-scale earthquake exceeding seismic intensity 6 occurs, the tilt response of the piston 15 inside the gas holder 1 can be suppressed, so that the collision of the piston 15 with the holder body 10 occurs. As a result, the steel frame of the holder main body 10 is broken, the compression of the column base is excessive, the base column 12 is buckled, and the pile head of the pile supporting the gas holder 1 is plasticized. The inertial force position and the collision reaction force position shift, and the piston 15 tilts inside the gas holder 1, the oil seal breaks between the holder main body 10 and the piston 15, gas leaks from that portion, and the piston 15 falls. It is possible to eliminate the conventional problem of doing.

  Moreover, according to this Embodiment, since it becomes a simple structure of providing the non-contact guide roller 33 with respect to the piston 15, a construction period can be shortened. In particular, when the non-contact guide roller 33 is provided for the purpose of reinforcing the existing gas holder 1, the stop period of the gas holder 1 can be shortened, and the influence of operation can be minimized.

Furthermore, since the inclination suppressing device 3 such as the non-contact guide roller 33 is attached to the piston 15, it is a reinforcement that does not weld directly to the holder body 10, and it is possible to prevent welding distortion from occurring in the holder body 10. Therefore, an allowable value of vertical accuracy can be ensured.
Furthermore, the tilt suppressing device 3 of the present embodiment is a mechanism that mechanically reduces the tilt, and has an advantage that it is not necessary to provide an electrical wiring in the air in the gas holder 1.

  Further, in the present embodiment, the non-contact guide roller 33 is provided via the vibration damper 37 with respect to the piston 15, and the damping action by the vibration damper 37 is brought into contact with the non-contact guide roller 33 and the side wall 14. Therefore, the tilt response of the piston 15 can be reduced more effectively.

  In the gas holder piston inclination suppressing device according to the above-described embodiment, it can be installed without performing welding work on the holder main body 10, and the collision and inclination of the piston 15 to the holder main body 10 during a large earthquake are suppressed. be able to.

  As mentioned above, although embodiment of the inclination suppression apparatus of the gas holder piston by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.

  For example, in the present embodiment, four horizontal motion damping devices 2 are provided on the piston 15, but these horizontal motion damping devices 2 can be omitted, and the quantity is limited to four. Never happen.

  Moreover, the structure of the guide frame 31 of the inclination suppression apparatus 3 is not limited to the structure by the combination of the support pillar 34 and the diagonal material 35 like this Embodiment, It is set as another shape and structure. It is possible. In short, it is only necessary that the guide frame 31 is provided with such a strength that the piston 15 is not broken when the piston 15 is inclined and a large collision force acts on the upper contact guide roller 32A.

  In the present embodiment, the non-contact guide roller 33 is fixed to the piston 15 via the vibration damper 37, but the vibration damper 37 may be omitted.

  Furthermore, the shape of the piston 15 is not limited to a curved surface shape, and may be a flat plate shape.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Gas holder 2 Horizontal motion damping device 3 Tilt suppression device 10 Holder main body 12 Base pillar 13 Horizontal beam 14 Side wall 14a Side wall inner surface 15 Piston 15a Outer part 15b Piston upper surface 15c Piston lower surface 16 Roof member 31 Guide frame 32 Contact guide roller 32A Upper contact Guide roller 32B Lower contact guide roller 33 Non-contact guide roller 34 Support pillar 37 Damping damper (damping device)
C Piston inclination center L, L1 interval E Circumferential direction F0 Inclination movement F1 Inclination force F2 Reaction force G Piston center of gravity R1 Gas filled space R2 Upper space Y Vertical direction

Claims (2)

An inclination suppression device for suppressing the inclination of the piston of the gas holder,
A plurality of guide frames provided on the outer peripheral upper surface of the piston and provided along the circumferential direction of the piston;
A contact guide roller disposed at each of an upper end and a lower end of the guide frame and provided so as to be able to roll in the vertical direction in contact with the inner wall of the holder body of the gas holder;
A non-contact guide roller disposed below the piston and below the position of the center of gravity of the piston, and provided so as to roll up and down in a state of being separated from the inner surface of the side wall;
An inclination suppression device for a gas holder piston, comprising:   The said non-contact guide roller is provided through the vibration damping device with respect to the said piston, The inclination suppression apparatus of the gas holder piston of Claim 1 characterized by the above-mentioned.