JP5737040B2 - tank - Google Patents

Description

  The present invention relates to a tank.

Conventionally, tsunami countermeasures have been taken for tanks installed facing the sea.
For example, Patent Document 1 discloses a configuration in which a steel sheet pile is protruded around the tank body to prevent drifting objects from coming into contact with the tank body.
Patent Document 2 discloses a configuration in which a tsunami protection fence is installed around the tank body.

JP 2008-231768 A JP 2007-302281 A

By the way, a nozzle for deriving the liquid stored in the tank body to the outside of the tank body is attached to the tank body.
One or more on-off valves are attached to this nozzle. Of these, the one closest to the tank body is generally referred to as the first main valve, and the liquid stored in the tank body in the event of an emergency Used to prevent leakage.

  However, the nozzle projects laterally from the tank body and is provided at the lower part of the tank body. For this reason, when the tsunami which exceeds the assumption arrives, the possibility that the nozzle is damaged and the first original valve does not function cannot be denied.

On the other hand, in order to cope with such a problem, it is conceivable to surround the first original valve with a protective container so that the tsunami does not directly reach the area where the first original valve is installed.
However, the tank body is thermally deformed due to changes in climate, the temperature of the stored matter, and the like. For this reason, the nozzle attached to the tank main body is displaced by thermal deformation of the tank main body. Here, if the protective container surrounding the first original valve is attached, a large stress is generated at the joint between the nozzle and the protective container due to the displacement of the nozzle, and the protective container or the like may be damaged.

  The present invention has been made in view of the above-described problems, and prevents the on-off valve from the tank main body from functioning most in the event of a tsunami arrival in the tank, and is caused by thermal deformation of the tank main body during normal times. The purpose is to prevent the occurrence of damage.

  The present invention adopts the following configuration as means for solving the above-described problems.

  A first aspect of the present invention is a tank main body for storing a liquid, and is attached to a side surface of the tank main body, and the liquid stored in the tank main body is led out of the tank main body or introduced from the outside into the tank main body. A protective container that is provided with a nozzle and an on-off valve provided for the nozzle, and that surrounds the on-off valve arranged closest to the tank main body and is closely arranged with respect to the nozzle and the tank main body And a displacement absorbing portion that is provided in a part of the protective container and that deforms the nozzle joint region of the protective container so as to be displaceable in the displacement direction of the nozzle due to thermal deformation of the tank body. .

  According to a second invention, in the first invention, a deformation preventing means for preventing a deformation of the displacement absorbing portion that is preset with a maximum displacement amount of the nozzle due to thermal deformation of the tank body and is larger than the maximum displacement amount. A configuration of providing is adopted.

  In a third aspect based on the second aspect, the deformation preventing means is disposed oppositely across the displacement absorbing portion in the deformation direction of the displacement absorbing portion, and the deformation of the displacement absorbing portion is the maximum displacement amount. A configuration is adopted in which the displacement plate is a support plate that supports the displacement absorbing portion when exceeding.

  According to a fourth aspect of the present invention, in the second aspect, the deformation preventing means is a separation distance between the block and the block fixedly disposed on the protective container with the displacement absorbing portion sandwiched in the deformation direction of the displacement absorbing portion. A configuration is adopted in which a stopper is provided for fixing the positional relationship between the blocks when the amount of change exceeds the maximum displacement.

According to the present invention, the protective container is provided which surrounds the on-off valve disposed closest to the tank body and is closely arranged with respect to the nozzle and the tank body.
For this reason, when a tsunami arrives, it is possible to prevent the tsunami from reaching the area where the on-off valve is installed in the nozzle.
Therefore, according to the present invention, it is possible to prevent the on-off valve from the tank body from functioning most in the event of a tsunami emergency.

Further, according to the present invention, the displacement absorbing portion is provided which is provided in a part of the protective container and can deform the nozzle joint area of the protective container in the displacement direction of the nozzle by the thermal deformation of the tank body.
For this reason, even if the nozzle is displaced due to thermal deformation of the tank body, it is possible to prevent the displacement absorbing portion from being deformed following the displacement of the nozzle and preventing a large stress from acting on the nozzle joining region.
Therefore, according to the present invention, it is possible to prevent damage due to thermal deformation of the tank body during normal times.

  As described above, according to the present invention, in the emergency of the arrival of a tsunami in the tank, the on-off valve closest to the tank body is prevented from functioning, and damage due to thermal deformation of the tank body occurs during normal times. Can be prevented.

It is a schematic diagram which shows schematic structure of the tank in 1st Embodiment of this invention. It is an enlarged view which shows typically the nozzle vicinity with which the tank in 1st Embodiment of this invention is provided. It is an enlarged view which shows typically the nozzle vicinity with which the tank in 2nd Embodiment of this invention is provided. It is an enlarged view which shows typically the nozzle vicinity with which the tank in 3rd Embodiment of this invention is provided.

  Hereinafter, an embodiment of a tank according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

(First embodiment)
FIG. 1 is a schematic diagram showing a schematic configuration of a tank 1 of the present embodiment. 1A is a plan view and FIG. 1B is a cross-sectional view.

A tank 1 shown in FIG. 1 is for storing a liquid such as oil or LNG (Liquefied Natural Gas), and is installed at a location facing the sea.
And the tank 1 is equipped with the tank main body 2, the floor board 3, and the nozzle 4 as shown in FIG.

The tank main body 2 is a container that directly stores liquid such as oil or LNG, and has a substantially cylindrical shape.
As shown in FIG. 1, a metal single shell tank is used as the tank body 2 in the present embodiment.

  The floor plate 3 is configured to support the tank body 2 on which the tank body 2 is mounted. The floor board 3 is made of, for example, concrete, and has a disk shape that has a larger radius than the shape of the tank body 2 in plan view.

  The nozzle 4 is attached to the side of the tank body 2 and at the bottom of the tank body 2. The nozzle 4 communicates from the inside of the tank body 2 to the outside, leads out the liquid stored in the tank body 2 to the outside, or introduces the liquid into the tank body 2 from the outside.

FIG. 2 is an enlarged view schematically showing the vicinity of the nozzle 4. 2A is a sectional view, and FIG. 2B is a perspective view of an expansion described later.
As shown in FIG. 2A, the tank 1 of this embodiment includes a first main valve 5, a protective container 6, an expansion 7 (displacement absorbing portion), and a support plate 8.

The case where the liquid stored in the tank body 2 is led out of the tank body 2 will be described. The first original valve 5 is an on-off valve arranged closest to the tank body 2 of the nozzle 4 and is used in an emergency. This is for closing the nozzle 4 so that liquid does not leak from the main body 2.
A shaft 9 for moving the first original valve 5 is connected to the first original valve 5. The shaft 9 passes through the protective container 6, and the tip protrudes to the outside of the protective container 6. A handle 10 for rotating the shaft 9 is attached to the tip of the shaft 9.

  The first main valve 5 is operated only in an emergency. For this reason, the shaft 9 is also rotated in an emergency. Therefore, it is preferable to arrange a sealing material 11 such as a rubber packing or a compound between the shaft 9 and the protective container 6 during normal times.

The protective container 6 is a box-shaped member that surrounds the first main valve 5 that is an on-off valve disposed closest to the tank body 2.
As shown in FIG. 2A, the protective container 6 is fixed in close contact with the side surface of the tank body 2 and the nozzle 4 by welding or an adhesive.

  The expansion 7 is provided in a part of the protective container 6 and deforms the nozzle joining region 61 of the protective container 6 so as to be displaceable in the displacement direction of the nozzle 4 due to thermal deformation of the tank body 2.

In the tank 1 of the present embodiment, the expansion 7 is provided on the side surface 62 of the protective container through which the nozzle 4 passes.
As shown in FIG. 2B, the expansion 7 is a bellows-like member formed by alternately arranging concavities and projections concentrically around the nozzle 4.

In the tank 1 of the present embodiment, the nozzle 4 is displaced in the extending direction by the thermal deformation of the tank body 2. For this reason, the expansion 7 is deformed so that the nozzle joining region 61 of the protective container 6 can be displaced in the extending direction of the nozzle 4.
Specifically, the expansion 7 can be deformed by swelling or denting in the extending direction of the nozzle 4.

The displacement amount of the nozzle 4 due to the thermal deformation of the tank body 2 can be predicted by grasping in advance the thermal environment to which the tank body 2 is exposed. For this reason, the maximum displacement amount of the nozzle 4 due to the thermal deformation of the tank body 2 can also be predicted and set in advance.
The support plate 8 prevents the expansion 7 from deforming larger than the preset maximum displacement amount of the nozzle 4.

As shown in FIG. 2A, the support plate 8 is disposed so as to face the expansion 7 in the deformation direction of the expansion 7 (the extending direction of the nozzle 4).
These support plates 8 prevent the deformation of the expansion 7 by receiving a load that abuts against the expansion 7 and acts on the expansion 7 when the deformation of the expansion 7 exceeds the above-described maximum displacement.
Since the support plate 8 is disposed with the expansion 7 in the displacement direction of the expansion 7, the deformation of the expansion 7 can be prevented regardless of the direction in which the expansion 7 is greatly displaced. .

According to the tank 1 of this embodiment which employs such a configuration, the first main valve 5 which is an on-off valve disposed closest to the tank body 2 is surrounded and closely arranged with respect to the nozzle 4 and the tank body 2. The protective container 6 is provided.
For this reason, when a tsunami arrives, it is possible to prevent the tsunami from reaching the installation area of the first original valve 5 in the nozzle 4.
Therefore, according to the tank 1 of this embodiment, it can prevent that the 1st original valve 5 from the tank main body 2 stops functioning most at the time of emergency of tsunami arrival.

Further, according to the tank 1 of the present embodiment, the expansion 7 is provided in a part of the protective container 6 and can deform the nozzle joint region 61 of the protective container 6 in the displacement direction of the nozzle 4 due to thermal deformation of the tank body 2. It has.
For this reason, even if the nozzle 4 is displaced due to thermal deformation of the tank body 2, the expansion 7 is deformed following the displacement of the nozzle 4, and it is possible to prevent a large stress from acting on the nozzle joining region 61. it can.
Therefore, according to the tank 1 of the present embodiment, it is possible to prevent damage due to thermal deformation of the tank body 2 during normal times.

  Thus, according to the tank 1 of the present embodiment, the first main valve 5 is prevented from functioning in the event of an tsunami emergency, and damage due to thermal deformation of the tank body 2 occurs during normal times. Can be prevented.

Further, the tank 1 of the present embodiment includes a support plate 8 that prevents deformation of the expansion 7 that is larger than the maximum displacement amount of the nozzle 4.
For this reason, for example, when the expansion 7 is about to be largely deformed by a tsunami, it is possible to prevent the expansion 7 from being damaged by the support plate 8 supporting the load.

Further, in the tank 1 of the present embodiment, the support plate 8 is disposed so as to face the expansion 7 in the deformation direction of the expansion 7.
For this reason, even if the expansion 7 is deformed in any direction, the expansion 7 can be prevented from being damaged.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

FIG. 3 is an enlarged cross-sectional view schematically showing the vicinity of the nozzle 4 provided in the tank 1A of the present embodiment.
As shown in this figure, a tank 1A of this embodiment includes a tank main body 2C that includes a metal inner tank 2A that directly stores liquid, and an outer tank 2B that surrounds the inner tank 2A and is made of metal or concrete. I have. The nozzle 4 is connected to the inner tank 2A.
Further, in the tank 1A of the present embodiment, the positional relationship between the inner tank 2A and the outer tank 2B is displaced by thermal deformation of the tank body 2C. For this reason, the nozzle 4 is connected to the outer tub 2 </ b> B via the second expansion 12.

Further, in the tank 1A of the present embodiment, an electric valve 13 is installed as a first original valve (open / close valve) closest to the tank body 2C.
Such an electric valve 13 is connected to the outside by a cable (not shown), and opens and closes based on an open / close signal input via the cable.
For this reason, it is not necessary to take out the shaft 9 and the handle 10 to the outside of the protective container 6 as in the first embodiment, and the internal sealability of the protective container 6 can be improved.

  Thus, even if the tank body 2C is a double shell tank, the present invention can be applied to prevent the electric valve 13 from functioning in the event of a tsunami emergency and to prevent the tank body 2C from functioning in normal times. It is possible to prevent damage caused by thermal deformation.

(Third embodiment)
Next, a third embodiment of the present invention will be described. The description of the third embodiment is based on the configuration of the second embodiment.

FIG. 4 is an enlarged view schematically showing the vicinity of the nozzle 4 provided in the tank 1B of the present embodiment. 4A is an outline view, and FIG. 4B is a cross-sectional view.
As shown in this figure, the expansion 14 is provided on the wall 63 of the protective container 6 facing the peripheral surface of the nozzle 4.

Further, the tank 1B of this embodiment includes a deformation preventing mechanism 15 instead of the support plate 8 shown in the first and second embodiments.
The deformation prevention mechanism 15 includes a block 15a, a stopper 15b, and a support bar 15c.

The block 15a is fixedly disposed on the protective container 6 with the expansion 14 interposed therebetween in the deformation direction of the expansion 14 (the extending direction of the nozzle 4).
The stopper 15b fixes the positional relationship between the blocks 15a so that when the amount of change in the separation distance between the blocks 15a exceeds the above-described maximum displacement, the amount of change does not increase any more. And this stopper 15b is opposingly arranged on both sides of each block 15a.
All the stoppers 15b are fixed to the support bar 15c, and the support bar 15c penetrates the two blocks 15a and is supported to be slidable with respect to the block 15a.

In the tank 1B of the present embodiment employing such a configuration, the stopper 15b comes into contact with the block 15a when the expansion 7 tends to be greatly deformed by a tsunami. As a result, the load is supported by the stopper 15b, and the amount of change in the separation distance between the blocks 15a is prevented from increasing.
For this reason, also in the tank 1B of this embodiment, it can prevent that the expansion 14 is damaged.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

For example, in the said embodiment, the structure which uses a manual on-off valve (1st original valve 5) in 1st Embodiment, and uses an electrically operated on-off valve (electric valve 13) in 2nd Embodiment was employ | adopted.
However, the present invention is not limited to this, and it is also possible to use an electric on-off valve in the first embodiment and a manual on-off valve in the second embodiment.

1, 1A, 1B ... tank, 2, 2C ... tank body, 3 ... floor plate, 4 ... nozzle, 5 ... primary valve (open / close valve), 6 ... protective container, 7, 14 ... Expansion (displacement absorbing part), 8 ... support plate (deformation preventing means), 9 ... shaft, 10 ... handle, 11 ... sealing material, 12 ... second expansion, 13 ... electric valve (open / close valve) , 15 ... Deformation prevention mechanism (deformation prevention means), 15a ... Block, 15b ... Stopper, 15c ... Support rod

Claims (2)

A tank body that stores liquid; a nozzle that is attached to a side surface of the tank body and that stores the liquid stored in the tank body to the outside of the tank body or introduces liquid from the outside to the tank body; and the nozzle A tank provided with an on-off valve provided for,
A protective container that surrounds the on-off valve disposed closest to the tank body and is closely arranged with respect to the nozzle and the tank body;
A displacement absorbing portion that is provided in a part of the protective container, and that deforms the nozzle joint region of the protective container so as to be displaceable in a displacement direction of the nozzle by thermal deformation of the tank body ;
Deformation preventing means for preventing a deformation of the displacement absorbing portion which is preset with a maximum displacement amount of the nozzle due to thermal deformation of the tank body and is larger than the maximum displacement amount;
With
The deformation preventing means is disposed oppositely across the displacement absorbing portion in the deformation direction of the displacement absorbing portion, and supports the displacement absorbing portion when the deformation of the displacement absorbing portion exceeds the maximum displacement amount. A tank characterized by being a plate . A tank body that stores liquid; a nozzle that is attached to a side surface of the tank body and that stores the liquid stored in the tank body to the outside of the tank body or introduces liquid from the outside to the tank body; and the nozzle A tank provided with an on-off valve provided for,
A protective container that surrounds the on-off valve disposed closest to the tank body and is closely arranged with respect to the nozzle and the tank body;
A displacement absorbing portion that is provided in a part of the protective container, and that deforms the nozzle joint region of the protective container so as to be displaceable in a displacement direction of the nozzle by thermal deformation of the tank body ;
Deformation preventing means for preventing a deformation of the displacement absorbing portion which is preset with a maximum displacement amount of the nozzle due to thermal deformation of the tank body and is larger than the maximum displacement amount;
With
The deformation preventing means is configured such that when the amount of change in the separation distance between the blocks fixed to the protective container and the blocks sandwiching the displacement absorbing portion in the deformation direction of the displacement absorbing portion exceeds the maximum displacement amount. A tank comprising a stopper for fixing a positional relationship between the blocks .

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