JP6191944B2 - Tank anchor device - Google Patents

Description

  This invention is a simple and detachable tank that is installed from the upper surface of the bottom plate outer periphery to the upper part of the foundation anchor bolt so that the flat-bottomed cylindrical tank that is stationary on the ground is not damaged by horizontal movement, side-sliding, or falling due to an earthquake or strong wind. It is related with the anchor apparatus.

FIG. 10 is an overall side view illustrating a side slip state of a conventional tank, and FIG. 11 is an entire side view illustrating a damage state in the vicinity of a tank anchor mounting portion of the conventional example.
As shown in the illustrated example, a conventional medium-sized flat-bottomed cylindrical tank 1 that is stationary on the ground includes a side plate 2, a bottom plate 3, and a roof 4, and is placed on a ground 5.
The tank 1 may have a side slip X shown in FIG. 10 or damage Y in the vicinity of the anchor mounting portion shown in FIG. 11 due to a horizontal force HP caused by an earthquake or strong wind.

  In the invention of Japanese Patent Application Laid-Open No. 55-112500 “Cylinder Storage Sliding Prevention Device” of Patent Document 1, a number of anti-sliding rods 6 are provided at the lower end position of the outer peripheral edge of the cylindrical storage tank 1 placed on the foundation 5. One end is connected to the joint portion 7 of the annular plate 4a, and each anti-sliding rod 6 is set at a small angle close to parallel to the tangent to the outer periphery of the cylindrical storage tank 1 and alternately turned to prevent the anti-sliding. A configuration in which the other end of the rod 6 is fixed to the support bolt 8 of the foundation 5 is disclosed.

  Japanese Patent Laid-Open Publication No. 63-147498 of “Patent Document 2” discloses a device for preventing slipping of a flat-bottom cylindrical storage tank under the side plate 3 of the storage tank so as not to restrain movement in the vertical direction parallel to the axis of the storage tank in the event of an earthquake. The structure of the anti-slip device engaged between the brackets 5, 9, 11 fixed in the vicinity of the edge and the anchor bars 7, 12 provided on the foundation 1 is disclosed.

  In the invention of Japanese Patent Application Laid-Open No. 11-49283 of “Patent Document 3”, the storage tank prevents the movement of the storage tank in the horizontal direction without restricting the vertical movement of the storage tank in the event of an earthquake or strong wind. A configuration of an anti-skid device having a connector 8 in which one bottom plate 2 is directly or indirectly connected to an embedded anchor 6 of a storage tank base 4 is disclosed.

Patent Document 4 utility model registration No. 3181060 publication "Tank anti-skid device" includes a flat-bottomed cylindrical tank that is stationary on the ground and falls or skids due to earthquakes or strong winds, and is lifted or washed away by tsunami or flood. A plurality of fixing members fixed in the circumferential direction with equal spacing between the lower outer peripheral surfaces of the side plates 2 of the tank 1 and a plurality of fixings fixed corresponding to the mounting members 7 There is disclosed a configuration in which a member 9 is provided, and the attachment member 7 and the fixing member 9 are detachably engaged with a connecting member 8 so that the pinning hinge can be rotated.

JP-A-55-112500 Japanese Utility Model Publication No. 63-147498 Japanese Patent Laid-Open No. 11-49283 Utility Model Registration No. 3181060

  10 and 11, the conventional medium-sized flat-bottomed cylindrical tank 1 that is stationary on the ground is not enough to cope with the side slip X caused by the horizontal force HP of earthquakes and strong winds, and the damage Y near the anchor mounting portion. There wasn't. Therefore, it is desired to prevent the side slip X and the damage Y by suppressing the movement by the horizontal force HP.

  The invention of Patent Document 1 “Anti-sliding device for cylindrical storage tank” is connected to a concrete foundation 5 with a large number of anti-sliding rods 6 but is troublesome in construction due to its complicated structure with long members. However, because of the structure in which the horizontal force is applied in the tangential direction, it becomes inefficient with respect to the load in the center direction.

  The idea of Patent Document 2 “Slide Stopping Device for Flat Bottom Cylindrical Storage Tank” is a device that prevents lateral slippage of the storage tank due to earthquakes or strong winds. However, it may be possible to damage the storage tank body. Furthermore, when the anti-skid device is damaged, it is not a structure that can be removed and replaced.

  The anti-skid device disclosed in the invention of Patent Document 3 “Storage tank anti-skid device”, in which the bottom plate of the storage tank is directly or indirectly connected to the embedded anchor of the storage tank foundation, is detachably attached to the outer surface of the side plate mainly when liquid is empty. However, although it has a certain effect on prevention of sliding in a strong wind, it is not a sliding prevention device adapted to the tank swinging due to an earthquake or a horizontal load.

  In addition, the utility model “Anti-sliding device for tank” in Patent Document 4 is designed to prevent the tank from falling or skidding due to an earthquake or strong wind, or being lifted or washed away by a tsunami or flood. However, there is a concern that the mounting member 7, the fixing member 9, the connecting member 8, or the like is damaged, or the lower outer peripheral surface of the tank side plate 2 is damaged.

The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to prevent a flat-bottomed cylindrical tank stationary on the ground from being slid or damaged by an earthquake or strong wind. An object of the present invention is to provide a tank anchor device having a simple and detachable structure that is fixed using a connecting member.

Anchoring devices of the tank according to the invention of claim 1, flat bottom cylindrical tank terrestrial stationary is, so as not to skidding or damage by earthquakes or strong winds, the solid was constant at a fixed portion whereas the edge to the bottom plate periphery upper surface, in the anchor device of the tank, characterized in that formed in the horizontal connecting plate which is fixed at the mounting section into the anchor bolt upper erected the basal and the other end, the middle portion of the connecting plate, sheath against compressive load The reinforcing material is provided with a structure in which the reinforcing material is slidably mounted .

Anchoring devices of the tank according to the invention of claim 1, flat bottom cylindrical tank terrestrial stationary is, so as not to skidding or damage by earthquakes or strong winds, the solid was constant at a fixed portion whereas the edge to the bottom plate periphery upper surface, in the anchor device of the tank, characterized in that formed in the horizontal connecting plate which is fixed at the mounting section into the anchor bolt upper erected the basal and the other end, the middle portion of the connecting plate, sheath against compressive load Since the structure is provided with a reinforcing material, and the reinforcing material is slidably mounted ,
It has resistance against sliding due to horizontal tensile load due to seismic force and wind pressure, that is, side slip, and resistance against liquid level fluctuation during storage, so it is effective as a countermeasure against earthquakes and strong winds. In addition, the connecting plate has a simple structure and is simplified, is detachable and can be easily installed, and can be easily replaced when damaged or broken.
In addition to having resistance to tensile load, it is possible to ensure durability against compressive load. This sheath-like reinforcing material is slidably attached to the intermediate portion of the connecting plate, so that the intermediate portion resists the tensile load and the sheath-like reinforcing material resists the load in the compression direction. Therefore, the intermediate part of the connecting plate is not curved or crushed.

It is the whole side explanatory view showing the example of an embodiment which installed the anchor device of the tank concerning the present invention in the flat bottom cylindrical tank. It is explanatory drawing of the A section of FIG. FIG. 3 is a perspective explanatory view of the vicinity of part A in FIGS. 1 and 2 as viewed from the upper left direction. FIG. 2 is an explanatory plan view of the entire tank of FIG. 1. It is a figure explaining the relationship of the force and displacement which act on a horizontal direction about the connection board of B section. It is a figure explaining the relationship of the force and displacement which act on the whole tank concerning a horizontal direction. It is a figure explaining the relationship of the force and displacement which act on the connecting plates A and B which oppose in the horizontal direction. It is plane explanatory drawing which attached the sheath-shaped reinforcement to the connection board. It is side surface explanatory drawing of the embodiment example of the fixing | fixed part structure of a connection plate. It is whole side explanatory drawing which shows the skid condition of the tank of a prior art example. It is whole side explanatory drawing which shows the damage condition of the anchor attachment part vicinity of the tank of a prior art example.

  An embodiment of an anchor device for a tank according to the present invention will be described with reference to FIGS. The present invention is not limited only to the following embodiments. It goes without saying that changes (for example, omission or addition of components, changes in the shape of components, etc.) can be added to the following embodiments without departing from the gist of the present invention. In addition, the figure shows the outline, only a part is drawn and the detailed structure is omitted.

FIG. 1 shows an embodiment in which a tank anchor device according to the present invention is installed in a flat bottom cylindrical tank.
The tank 1 includes a side plate 2, a bottom plate 3, and a roof 4, and is installed on a foundation 5.
The anchor device 6 is installed from the bottom plate outer peripheral upper surface 3a to the base upper surface 5a.
With this anchor device 6, it is possible to prevent side-slip movement of the tank 1 and damage to the tank anchor portion in response to the horizontal force HP caused by an earthquake or strong wind.

FIG. 2 is an explanatory view showing an A portion of FIG. 1 and the vicinity of the anchor device 6 in an enlarged manner. The anchor device 6 is formed by an anchor bolt 10, a base plate 11, and a connecting plate 7. The anchoring device 6 fixed by the fixing unit 8 to the bottom plate periphery upper surface 3a one end of the connecting plate 7 and the other end is solid with the mounting portion 9 in the anchor bolt 10 upper and interposed base plate 11 to the underlying upper surface 5a Determine.

FIG. 3 is a view of the vicinity of portion A in FIG. 1 as viewed from the upper left direction. The anchor device 6 installs a plurality of connecting plates 7 at equal intervals in the circumferential direction from the bottom plate outer peripheral surface 3a to the base upper surface 5a. One end of the connecting plate 7 is fixed by the fixing unit 8 of the bottom plate periphery upper surface 3a, the other end solid with the mounting portion 9 thereon by interposing a flat base plate 11 to the anchor bolt 10 the upper portion of the underlying upper surface 5a Determine.

FIG. 4 is an explanatory plan view of the entire tank of FIG. 1 and shows an example in which a plurality of anchor devices 6 are installed at intervals in the circumferential direction of the outer periphery of the tank 1.
One end of each connecting plate 7 is fixed by the fixing unit 8 to the bottom plate periphery upper surface 3a, the other end is fixed at the mounting portion 9 in the anchor bolt 10 the upper portion of the underlying upper surface 5a.
In this way, by installing a plurality of anchor devices 6, it is possible to prevent the tank from slipping in response to the horizontal force HP caused by an earthquake or strong wind.
Further, when the allowable load is exceeded, the connecting plate 7 yields and breaks, so that damage to the anchor mounting portion of the tank can be prevented.

FIG. 5 is a diagram for explaining the relationship between the horizontal force P and the displacement δ with respect to the tank 1 plan view and the connecting plate 7 alone shown in part B.
The relationship between stress (tension) and strain (elongation) and the relationship between compressive force and strain with respect to the tensile force applied to the connecting plate 7 alone of the anchor device 6 is shown.
The connecting plate 7 is formed by combining, for example, a rectangular portion 7a having a large cross-sectional area (good cross-sectional performance), a thick rectangular portion 7a, an elliptical portion 7b, and a narrow and long intermediate portion 7c.
The connecting plate 7 is made of high-strength steel and is subjected to tensile yielding at an intermediate portion 7c having a narrow width against an excessive tensile load. Therefore, when an excessive load is applied in the horizontal direction, the connecting plate 7 counteracts at the intermediate portion 7c. To do. Furthermore, when an excessive load exceeding a predetermined value is applied, the side plate and the bottom plate of the tank are not damaged by absorbing energy at the intermediate portion 7c.
The connecting plate 7 of the anchor device 6 has a simple structure, is simplified, and is easy to manufacture and construct. The connecting plate 7 is detachable and can be easily installed, and can be easily replaced when damaged or broken.

FIG. 6 is a diagram for explaining the relationship between the force acting on the entire tank in the horizontal direction and the displacement. As shown in the plan view, the relationship between tension and compression when a lateral sliding load P1 is applied to the tank 1 to generate strain δ is shown. Each connecting plate 7 in A to D is subjected to a tensile force of PA or PC or a compressive force of PB or PD. Based on this total load, as shown in the graph in the case of earthquake response, A to D are (b) medium and small-scale ground motion, B to D are (b) large-scale ground motion, and C to D are (ha ) Design values corresponding to ultra-large scale ground motions .

FIG. 7 is a diagram for explaining the relationship between the horizontal load and displacement applied to the connecting plate 7 at positions A and B in FIG.
Reference numeral 8a denotes a fixing portion hole on the outer peripheral upper surface of the bottom plate, 9a denotes a mounting portion hole on the upper portion of the anchor bolt, and 10 denotes an anchor bolt.
For the horizontal load P and displacement δ in the tank diameter direction, the total of the tensile force by the connection plate 7 at the A position and the compression force by the connection plate 7 at the B position is the resistance force.

FIG. 8 is an explanatory plan view in which a sheath-like reinforcing member 12 is attached to the connecting plate.
An example is shown in which a sheath-like reinforcing member 12 is attached so that the compressive force is increased in the parallel intermediate portion 7c of the connecting plate 7 of the anchor device 6. 8a is a fixing part hole to the upper surface of the outer periphery of the bottom plate, and 9a is a mounting part hole to the upper part of the anchor bolt.
The sheath-like reinforcing member 12 is slidably attached to the intermediate portion 7c of the connecting plate 7 so that the intermediate portion 7c resists a tensile load and a sheath-like reinforcement against a load in the compression direction. Since the material 12 opposes, the intermediate part 7c of the connection plate 7 is not curved or crushed.

FIG. 9 is an explanatory side view of a second embodiment of the connecting plate fixing portion structure. The illustrated example shows a case where the connecting plate 7 by interposing a base sheet 13 and the resilient member 14 to the upper portion 10a of the anchor bolt 10 which projects on the basis upper surface 5a, to fixed elasticity structure fastening nut 15 . The elastic member 14 absorbs vibrations against the force in the vertical direction and prevents the connecting plate 7 from bending. The upper portion of the bolt of the bottom plate periphery upper surface 3a for fixing the connecting plate 7, by providing the cover 17 and fixed with the cap nut 16, promote corrosion of the fixed part.

Thus , the anchor device 6 using the detachable connecting plate 7 fixed by the fixing portion 8 or the attachment portion 9 has a simple structure, is easy to install, and can be easily replaced when damaged or broken. Can be done.

The anchor device 6 for preventing the side slip and preventing damage can be applied not only to a flat bottom cylindrical tank, but also to structures such as tanks and storages having various structures for which protection measures and an improvement in earthquake resistance are desired in the event of an earthquake.

1 tank
2 side plate
3 bottom plate
4 roofs
5 basics
6 anchor device
7 connecting plates
8 fixed parts
9 Mounting part
10 anchor bolt
11 anchor base plate
12 reinforcements
13 base sheet
14 elastic materials
15 tightening nut
16 bag nuts
17 cover

HP: Horizontal force
P: Load
δ: Strain

Claims (1)

Flat bottom cylinder tanks ground stationary is, so as not to skidding or damage by earthquakes or strong winds, one end was fixed by the fixing unit to the bottom plate periphery upper surface of the anchor bolt upper portion attached erected the basal and the other end in the anchor device of the tank, characterized in that the formation fixed to the horizontal connecting plate in parts,
In the intermediate part of the connecting plate, a structure provided with a sheath-like reinforcing material that resists compressive load,
And the anchor device of the tank characterized by having the structure which mounted | worn the said reinforcement material slidably .

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