WO2008041405A1

WO2008041405A1 - Double shell structure tank unit equipped with displacement measuring device, and tank facility

Info

Publication number: WO2008041405A1
Application number: PCT/JP2007/064568
Authority: WO
Inventors: Daisuke Goto
Original assignee: Mitsubishi Heavy Industries, Ltd.
Priority date: 2006-09-29
Filing date: 2007-07-25
Publication date: 2008-04-10
Also published as: JP4959376B2; JP2008106928A

Abstract

[PROBLEMS] A problem with a conventional double sell structure tank unit is that relative displacement or rotation of the inner tank with respect to the outer tank cannot be monitored upon occurrence of a big earthquake. [MEANS FOR SOLVING PROBLEMS] The double shell structure tank unit is provided, in a double shell structure tank having an outer tank and an inner tank, with a device for measuring radial displacement penetrating the upper portion of the outer tank, a shut-off valve provided at the device for measuring radial displacement on the outside of the outer tank, and an attachment/detachment seat for a laser transmitter/receiver provided at the upper end of the device for measuring radial displacement. Upon occurrence of a big earthquake, displacement of the inner tank with respect to the outer tank is measured and the position of the inner tank after displacement can be specified.

Description

Specification

Double shell structure tank device with displacement measuring device and tank equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to a double-shell structure tank device including a tank displacement measuring device in a large-capacity double-shell structure tank that stores, for example, liquefied natural gas (LNG) and the like, and a tank facility. .

Background art

[0002] Tanks of various structures have been proposed and manufactured as tanks for storing LPG (liquefied petroleum gas), LNG (liquefied natural gas), and the like.

For example, what is described in Patent Document 1 is that if a large earthquake occurs around a low-temperature liquefied gas tank with a double shell structure consisting of an outer tank and an inner tank, the low temperature Even if the liquefied gas tank breaks and the leakage of low-temperature liquefied gas occurs, a breakwater is provided to prevent secondary disasters such as contamination of the surrounding environment.

In addition, what is described in Patent Document 2 receives an inner tank made of a metal plate that can store a low-temperature liquefied gas in an outer tank made of concrete, and a low-temperature liquefied gas leaked from the inner tank. And a metal plate receiving tank.

In such a double-shell tank device, if a large earthquake occurs and the inner tank is displaced or rotated relative to the outer tank, there is a possibility that normal operation cannot be performed. It is desirable to monitor the relative displacement or rotation of the tank.

However, in both cases described in Patent Document 1 and Patent Document 2, a concrete outer tub or a breakwater is installed to prevent low temperature liquefied gas from leaking out in the event of a large earthquake. There is no means to detect the movement S, the displacement (slide), rotation, etc. of the inner tank caused by a large earthquake!

[0003] Also, it is not a tank that stores LPG, LNG, etc., but as shown in Fig. 25, it monitors the damage status of storage tanks such as oil tanks due to earthquakes, etc., and predicts them before serious damage occurs. As shown in the figure, the entire circumference of the side plate 102 joined to the bottom end plate 101 of the storage tank A strain measuring device that lays out an optical fiber 103 from the bottom end plate 101 over the entire circumference at an appropriate height, and measures the circumferential strain of the side plate 102 through the optical fiber 103 over the entire circumference; A strain data processing device, and an inclination angle of the side plate 102 at the joint with respect to the bottom end plate 101 is estimated from a circumferential strain measurement value of the side plate 102 in the vicinity of the joint, and an appropriate height from the bottom end plate 101 The circumferential strain measurement value of the side plate 102 at the position, the local plastic strain value generated in the joint together with the plastic strain value generated by buckling, the occurrence of cracks, the bottom end plate 1 the depression of the lower foundation, the side plate One that monitors the buckling of 102 has been proposed (for example, Patent Document 3).

Although the one described in Patent Document 3 also monitors the damage state of a storage tank such as an oil tank due to an earthquake or the like, it is a means for detecting whether the storage tank is displaced or rotated regardless of whether it is damaged or not damaged. What is provided! / ,!

Patent Document 1: Japanese Patent Application Laid-Open No. 11 63393

Patent Document 2: JP 2003 240197

Patent Document 3: Japanese Patent Laid-Open No. 2002-340741

Disclosure of the invention

Problems to be solved by the invention

[0005] In such a double-shell structure low-temperature liquefied gas tank! / When a large earthquake occurs and the inner tank is displaced or rotated relative to the outer tank, normal operation can be performed. Therefore, it is desirable to monitor the relative displacement or rotation of the inner tank relative to the outer tank.

[0006] Further, when the outer and inner tanks of the low-temperature liquefied gas tank having a double shell structure are made of, for example, a cryogenic metal and further provided with a concrete breakwater on the outside thereof, relative displacement or It is conceivable to install a device to monitor the rotation so as to penetrate the side of the outer tank.

However, when a low-temperature liquefied gas tank with a double-shell structure is composed of a cryogenic metal inner tank and a concrete outer tank, for safety reasons, holes will be provided in the side and bottom of the concrete outer tank. I can't.

Furthermore, since it is impossible for people to enter the tank unless the inside of the tank is opened, it is difficult to maintain these if a monitoring device is installed in the tank. Therefore, a device that monitors the three-dimensional displacement in the radial, rotational, and height directions of the tank inside the tank from the top of the tank outside the tank is required.

[0007] The present invention is intended to solve the problems of the above-described configuration, and is a low-temperature liquefied gas tank having a double shell structure, particularly an inner tank made of a cryogenic metal and an outer tank made of concrete. Double shell structure equipped with a displacement measuring device that can monitor the relative displacement or rotation of the inner tank relative to the outer tank! The purpose is to provide tank equipment and tank equipment.

Means for solving the problem

[0008] The present invention solves the above problems by using the following means.

[0009] (1) The double shell structure tank device of the first means,

In a double-shell structure tank having an outer tank and an inner tank,

A pipe for measuring radial displacement passing through the upper part of the outer tub,

A shut-off valve provided outside the outer tub of the radial displacement measuring pipe, and a laser transmitter / receiver mounting seat provided at an upper end of the radial displacement measuring pipe. To do.

[0010] (2) The second means is the double shell tank device of the first means,

A mirror body that is attached to a lower end of the radial displacement measuring pipe and reflects laser light emitted from a laser-type distance measuring device connected to the laser transmitter / receiver seating in the direction of the inner tank;

A special feature is that

[0011] (3) The third means is the double shell structure tank device of the second means,

The inner tank has an inner tank bottom plate and an inner tank side wall, and an inner tank upper lid provided to be movable relative to the inner tank side wall,

The radial displacement measuring pipe extends in a vertical direction and penetrates the inner tank upper lid.

(4) The fourth means is the double shell structure tank device of the third means! /

The radial displacement measuring pipe and the mirror body are made of the same material.

[0013] (5) The fifth means is a double shell structure tank device of the third or fourth means! / Two pipes for measuring radial displacement facing the inner tank are provided,

Irradiation directions of the laser beams reflected by the mirror body are 90 ° ± 20 with respect to each other in a horizontal plane.

The specular body is installed so as to open within a range of%.

(6) The sixth means is a double-shell structure tank device of the third or fourth means! /

At least three radial displacement measuring pipes facing the inner tank are provided,

The mirror body is installed such that the irradiation direction of the laser beam reflected by the mirror body opens at an equal angle in a horizontal plane.

(7) The seventh means is a double shell structure tank device of the third or fourth means! /

One radial displacement measuring pipe facing the inner tank,

The specular body has a polygonal pyramid shape,

The laser beam is irradiated to a plurality of locations.

(8) The eighth means is a double-shell structure tank device of the third or fourth means! /

One radial displacement measuring pipe facing the inner tank,

The specular body has a polygonal pyramid shape,

The irradiation direction of the laser beam can be changed.

[0017] (9) The ninth means is a double shell structure tank device of the third to eighth! /, Any means! /, A vertical member attached to the inner tank side wall,

A rotational displacement measuring pipe extending in the vertical direction and penetrating the upper part of the outer tank and the upper cover of the inner tank and facing the vertical member;

A shut-off valve provided outside the outer tub of the rotational displacement measuring pipe, a laser transmitter / receiver seat provided at the upper end of the rotational displacement measuring pipe, and a lower end of the rotational displacement measuring pipe A second mirror body that is attached and reflects laser light emitted from a laser-type distance measuring device connected to the laser transmitter / receiver seat, in the direction of the vertical member;

A special feature is that

[0018] (10) The tenth means is the double-shell structure tank device of the ninth means,

The rotational displacement measuring pipe and the second mirror body are made of the same material. It is a sign.

(11) The eleventh means is the double-shell structure tank device of any one of the third to tenth means,

A horizontal member attached to the inner tank side wall;

A pipe for measuring the displacement in the height direction of the inner tub extending vertically and penetrating the upper portion of the outer tub and the upper lid of the inner tub and facing the horizontal member;

A shutoff valve provided outside the outer tank of the height direction displacement measuring pipe of the inner tank, and a laser transmitter / receiver seating provided at the upper end of the height direction displacement measuring pipe of the inner tank, It is provided with.

[0020] (12) The twelfth means is the double shell tank device according to any one of the third to eleventh means.

A special feature is that

A pipe contraction correcting pipe extending in the vertical direction and penetrating the upper part of the outer tank and the upper cover of the inner tank;

A shut-off valve provided outside the outer tub of the pipe contraction correction pipe; a laser transmitter / receiver seat provided at an upper end of the pipe contraction correction pipe; and a lower end of the pipe contraction correction pipe. Horizontal parts at the bottom of the horizontal pipe,

A special feature is that

(13) The thirteenth means is a double shell structure tank device according to any one of the third to eighth means,

A temperature sensor is provided at a predetermined interval in the radial displacement measuring pipe or the pipe penetrating the inner tank upper lid.

[0022] (14) The fourteenth means is characterized in that, in the double-shell structure tank device of the ninth or tenth means, a temperature sensor is provided at a predetermined interval on the rotational direction displacement measuring pipe.

(15) In the fifteenth means, the double-shell structure tank device of the eleventh means,

A temperature sensor is provided at predetermined intervals on the pipe for measuring displacement in the height direction of the inner tank. Features.

(16) The sixteenth means is the double-shell structure tank apparatus according to the second,

The radial displacement measuring pipe extends in a vertical direction and extends between the inner tank and the outer tank.

(17) The seventeenth means is the double shell structure tank device according to the sixteenth aspect,

(18) The eighteenth means is the double-shell structure tank device according to the sixteenth or seventeenth aspect, wherein the vertical member attached to the inner tank side wall;

A rotational displacement measuring pipe extending in the vertical direction and extending between the inner tank and the outer tank;

A shutoff valve provided outside the outer tub of the rotational direction displacement measuring pipe, a laser transmitter / receiver seat provided at the upper end of the rotational direction displacement measuring pipe, and a lower end of the rotational direction displacement measuring pipe A second mirror body that reflects laser light emitted from a laser-type distance measuring device connected to the laser transmitter / receiver seat in the direction of the vertical member;

A special feature is that

[0027] (19) The nineteenth means is the double shell structure tank device according to any one of the sixteenth to eighteenth aspects,

A horizontal member attached to the inner tank side wall;

A pipe for measuring the displacement in the height direction of the inner tub extending in the vertical direction and facing the horizontal member;

[0028] (20) The twentieth means is the double-shell structure tank device according to any one of the first to nineteenth aspects. And

A laser-type distance measuring device is connected to each of the laser transmitter / receiver seats.

(21) The twenty-first means is the double-shell structure tank device according to any one of the ninth to thirteenth, eighteenth and nineteenth aspects,

A tank monitoring device for calculating and displaying radial displacement and rotational displacement in the double-shell structure tank device;

The tank monitoring device

The measured value of the radial displacement measured by the laser type distance measuring instrument connected to the radial displacement measuring pipe and the measured value of the laser type distance measuring instrument connected to the rotational direction displacement measuring pipe. The measured value of the pipe length measured by the laser-type distance measuring instrument connected to the pipe contraction correction pipe is subtracted from the measured value of the displacement in the rotational direction to obtain the radial distance and the rotational distance. A pipe length corrector for calculating, an inner tank side wall position calculator for calculating the radial distance force of the pipe length corrector, and the position of the inner tank side wall;

A center position calculator for calculating the center position of the inner tank side wall based on the position of the inner tank side wall from the inner tank side wall position calculator;

A radial displacement calculator for calculating a displacement amount of the center position of the inner tank side wall based on the center position from the center position calculator;

A vertical member position calculator for calculating the position of the vertical member based on the rotational direction distance from the pipe length corrector;

A center position corrector that calculates the true position of the vertical member based on the position of the vertical member from the vertical member position calculator;

A rotation direction displacement calculator for calculating a rotation angle of the inner tank side wall based on the true position of the vertical member from the center position corrector;

A display for displaying the amount of displacement of the center position from the radial displacement calculator and the rotation angle from the rotational displacement calculator;

A special feature is that (22) The double-shell structure tank device of the 22nd means is

In a double-shell structure tank having an outer tank and an inner tank,

Four radial displacement measuring pipes that penetrate the upper part of the outer tank and are attached at equal intervals;

A shut-off valve provided outside the outer tub of each radial displacement measuring pipe, and a laser transceiver attaching / detaching seat provided at an upper end of each radial displacement measuring pipe,

Mirror surface that reflects each laser beam emitted from each laser-type distance measuring instrument attached to the lower end of each radial displacement measuring pipe and connected to each laser transmitter / receiver seat to the inner tank. Body,

Two vertical members attached to the inner tank side wall with respect to the center of the inner tank, and extending in the vertical direction through the upper part of the outer tank and the inner tank upper lid, and to each vertical member Pipes for measuring rotational displacement that face each other,

A shutoff valve provided outside the outer tub of each rotational direction displacement measuring pipe, a laser transmitter / receiver seating provided at an upper end of each rotational direction displacement measuring pipe, and each rotational direction. Each laser beam emitted from each laser type distance measuring device attached to the lower end of each displacement measuring pipe and connected to each laser transmitter / receiver seat is reflected in the direction of each vertical member. A second mirror body,

A pipe contraction correction pipe that extends vertically and passes through the upper part of the outer tub, a shutoff valve provided outside the outer tub of the pipe contraction correction pipe, and an upper end of the pipe contraction correction pipe. A horizontal member at the bottom of the horizontal pipe attached to the bottom of the laser transceiver mounting and detaching seat and the pipe contraction correction pipe;

The tank monitoring device

A measured force of the radial displacement measured by the laser-type distance measuring instrument connected to the radial displacement measuring pipe; a central position calculator for calculating a central position of the inner tank side wall; Measured by the laser distance measuring instrument connected to the pipe contraction correction pipe from the measured value of the rotational displacement measured by the laser distance measuring instrument connected to the rotational displacement measuring pipe. A pipe length corrector that subtracts the measured pipe length and calculates the distance in the rotational direction;

A rotation direction calculator for calculating the rotation angle of the inner tank side wall based on the rotation direction distance from the pipe length corrector and the center position calculated by the center position calculator, and these measured values and calculated values Display to display and

A special feature is that

(23) The double-shell structure tank device of the 23rd means is

In a double-shell structure tank having an outer tank and an inner tank,

A temperature sensor attached to any of the measurement pipes; A tank monitoring device for calculating and displaying radial displacement and rotational displacement in the double-shell structure tank device;

The tank monitoring device

A measured force of the radial displacement measured by the laser-type distance measuring instrument connected to the radial displacement measuring pipe; a central position calculator for calculating a central position of the inner tank side wall;

Pipe length measurement value calculated based on the temperature measured by the temperature sensor from the rotation direction displacement measurement value measured by the laser distance measuring instrument connected to the rotation direction displacement measurement pipe. And a rotation angle of the inner tank side wall based on the rotation direction distance from the pipe length correction unit and the center position calculated by the center position calculator. Rotation direction computing unit that computes these, and a display that displays these measured and computed values,

A special feature is that

[0032] (24) The tank apparatus of the twenty-fourth means is the double-shell structure tank device according to any one of the twenty-first to twenty-third aspects

A plurality of the double shell structure tanks are installed,

Each of the tank monitoring devices is provided in a central monitoring center.

The invention's effect

[0033] The invention according to each claim described in the claims employs each of the above-described means, and in a double-shell structure tank having an outer tank and an inner tank, the upper part of the outer tank is penetrated. A radial displacement measurement, a shut-off valve provided outside the outer tank for the radial displacement measurement, and a laser transceiver attaching / detaching seat provided at an upper end for the radial displacement measurement. As a result, when a large earthquake occurs, the amount of displacement (slide) of the inner tank relative to the outer tank can be measured, and the position after displacement of the inner tank can be specified.

Further, it is also possible to detect the force of the inner tank side wall causing buckling deformation.

Furthermore, the displacement measuring device that measures the rotational displacement of the inner tub can be The position can be specified.

Brief Description of Drawings

FIG. 1 is an overall plan view of a double-shell structure tank according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the double-shell structure tank according to the first embodiment of the present invention.

FIG. 3 is an end view taken along the line AA in FIG.

4 is a detailed side end view of the radial displacement measuring device of FIG. 1.

FIG. 5 is a detailed side end view of the rotational direction displacement measuring device in FIG. 1.

FIG. 6 is a detailed side end view of the height direction displacement measuring device for the inner tank of FIG. 1.

FIG. 7 is a detailed side end view of the pipe contraction correction amount measuring apparatus of FIG. 1.

FIG. 8 is a detailed side view of a radial displacement measuring device or a rotational displacement measuring device of a double-shell structure tank according to a second embodiment of the present invention.

FIG. 9 is a detailed side view of a radial displacement measuring device for a double-shell structure tank according to a third embodiment of the present invention.

FIG. 10 is a detailed side view of a radial displacement measuring device for a double-shell structure tank according to a fourth embodiment of the present invention.

FIG. 11 is a detailed side view of a radial displacement measuring device for a double-shell structure tank according to a fifth embodiment of the present invention.

FIG. 12 is a detailed side view of a radial / rotational direction displacement measuring apparatus for a double-shell structure tank according to a sixth embodiment of the present invention.

FIG. 13 is a detailed side view of a radial displacement and pipe contraction correction amount measuring apparatus of a double-shell structure tank according to a seventh embodiment of the present invention.

FIG. 14 is a partial sectional side view of a radial displacement measuring device for a double-shell structure tank according to a ninth embodiment of the present invention.

FIG. 15 is an enlarged view of part A in FIG.

FIG. 16 is a plan view of a rotational direction displacement measuring device for a double-shell structure tank according to a ninth embodiment of the present invention.

FIG. 17 is a partial sectional side view of a height direction displacement measuring device for an inner tank of a double-shell structure tank according to a ninth embodiment of the present invention. FIG. 18 is an enlarged view of part B in FIG.

19] It is a partial side sectional view of a radial displacement measuring device for a double-shell structure tank according to a tenth embodiment of the present invention.

FIG. 20 is an enlarged view of part C in FIG.

FIG. 21] is a block diagram of a first example of a tank monitoring device in each embodiment of the present invention.

FIG. 22 is an explanatory diagram showing a measurement principle of a second example of the tank monitoring device in each embodiment of the present invention.

FIG. 23] It is a block diagram of a tank monitoring apparatus of a second example of the tank monitoring apparatus in each embodiment of the present invention.

FIG. 24] is an overall schematic diagram of a tank facility in which a plurality of double-shell structured tanks according to each embodiment of the present invention are installed.

25] This is a storage tank damage prediction system using conventional optical fiber.

Explanation of symbols

1 Inner tank

2 Inner tank bottom plate

3 Inner tank side wall

4 Inner tank top cover

5 Outer tank

6 Outer tank bottom plate

7 Outer tank side wall

8 Outer tank top lid

9 Inner tank top lid hanging bracket

10 Insulation material for tank support member

11 Insulation

12 Particulate insulation

13 Cryogenic liquid

14 Nitrogen gas

15 Cryogenic fluid loading / unloading piping Discharge pump

Bellmouth

Support

Pipe support

Horizontal member for measuring the height displacement of the inner tank Vertical member for measuring the tank rotation

Purge discharge pipe

Nitrogen gas supply pipe for purging

Nitrogen gas supply pipe

Vaporized gas recovery pipe

26a-26d Radial displacement measuring device e Radial and rotational displacement measuring device f Radial displacement and pipe contraction correction measuring device, 27a Rotational displacement measuring device

Inner tank height direction displacement measuring device Pipe shrinkage correction amount measuring device

30a-30d Pipe for measuring radial displacement e Pipe for measuring radial and rotational displacement f Measuring pipe for radial displacement and shrinkage correction amount a, 31b Pipe for measuring rotational displacement

Pipe for measuring displacement in the height direction of the inner tank Pipe for pipe contraction correction

Displacement measuring instrument storage box

Shut-off valve

Mirror body storage enclosure

37a-37c, 60 mirror bodies

d Horizontal member

38a ~ 38h Laser type distance measuring instrument a ~ 39h laser light

Outlet tube 40

Nove side flange 41 (Removable seat for laser transmitter / receiver) Laser light transmission pressure plate

Laser beam path changer

Mounting bolt nut

Displacement measuring instrument storage box side flange

Barrel

Movable lid

Metal plate

50a Radial displacement measuring device

Rotational displacement measuring device

Inner tank height direction displacement measuring device

Horizontal member for measuring the displacement of the inner tank in the height direction

Vertical member for tank rotation measurement

a ~ 55d Pipe for radial displacement measurement

a, 56b Pipe for measuring rotational displacement

Pipe for measuring the displacement of the inner tank in the height direction

Displacement measuring instrument storage box

Mirror body storage enclosure

Pipe support

Outlet pipe

Bellows for connecting inner tank wall

Horizontal member support legs

Bellows for connecting horizontal members

Inner tank wall side thick pipe

Seal rubber 69 Vertical member for tank rotation measurement

70, 70a Tank monitoring device

71 Pipe length compensator

72 Inner tank side wall position calculator

73 Center position calculator

74 Radial displacement calculator

75 Vertical member position calculator

76 Center position compensator

77 Rotational direction displacement calculator

78a E5 selfish, ¾f

78b recorder

79 Display

80 thermometer

81 Aircraft side indicator

82 Stretch amount calculator

83 Center position calculator

84 Rotation direction calculator

85 Outlier detector

86 Warning indicator

87 Display / Recorder

88 Pipe length calculator 88

91 Tank equipment 91

90 Discharge pump controller 90

Pa to Ph Measurement position

Pma ~ Pmh New measurement position

Pa to Ph Measurement position

Pma ~ Pmh New measurement position

La to Ld Measured value of radial displacement Lma ~ Lmd New radial displacement measurement

A La ~ A Ld Radial direction distance

A Lma to A Lmd New radial direction distance

Le, Lf Measured value of displacement in the previous rotation direction

Lme, Lmf New rotation direction displacement measurement

A Le, A Lf Distance in previous rotation direction

A Lme, A Lmf New rotation direction distance

Lg Measured value of displacement in the height direction of the existing tank

Measured value of Lmg displacement in the new inner tank

A Lg Inner tank height direction displacement

Lh Measured value of existing pipe length

Lmh New pipe length measurement

BEST MODE FOR CARRYING OUT THE INVENTION

[0036] Hereinafter, a double-shell structure tank apparatus, a tank displacement measurement apparatus, and a tank facility provided with a displacement measurement apparatus according to each embodiment of the present invention will be described.

[0037] (First embodiment of the present invention)

First, with reference to FIGS. 1 to 7 and FIG. 24, a double-shell structure tank apparatus and a tank facility provided with a displacement measuring apparatus according to a first embodiment of the present invention will be described.

FIG. 1 is an overall plan view of a double-shell structure tank according to a first embodiment of the present invention. FIG. 2 is a horizontal sectional view of the double-shell structure tank according to the first embodiment of the present invention. FIG. 2 is also a BB end view in FIG. 3 below.

3 is an end view taken along the line AA in FIG.

FIG. 4 is a detailed side end view of the radial displacement measuring device 26 of FIG.

FIG. 5 is a detailed side end view of the rotational direction displacement measuring device 27 of FIG.

FIG. 6 is a detailed side end view of the inner tank height direction displacement measuring device 28 of FIG.

FIG. 7 is a detailed side end view of the pipe contraction correction amount measuring device 29 of FIG.

FIG. 24 is an overall schematic diagram of a tank facility in which a plurality of double-shell structure tanks according to each embodiment of the present invention are installed. [0038] The tank displacement measuring device according to the first embodiment of the present invention includes four (at least two) radial displacement measuring devices 26 and two (at least one) rotational displacement measuring devices 27. It consists of one inner tank height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29 and tank monitoring device 70 (70a).

On the inner surface of the inner tank side wall 3, a horizontal member 20 for measuring the displacement in the height direction of the inner tank, and two (at least one) vertical member 21 for measuring the tank rotation are attached.

Details of the tank monitoring device 70 (70a) will be described later.

[0039] (Overall configuration of double-shell structure tank)

As shown in Fig. 1, Fig. 2 and Fig. 3, the double shell tank is composed of an outer tank 5 made of reinforced concrete and an inner tank 1 made of ultra-low temperature resistant metal installed in the outer tank 5. Yes.

Generally, when the inner tub 1 and the outer tub 5 are made of metal, it is necessary to provide a separate concrete enclosure on the outside of the outer tub in case the metal is damaged.

However, in the double-shell structure tank according to the present embodiment, since the outer tub 5 is made of reinforced concrete, no further concrete enclosure is required.

As shown in FIG. 3, the outer tank 5 includes a disc-shaped outer tank bottom plate 6, a cylindrical outer tank side wall 7 that is airtightly fixed on the outer tank bottom plate 6, and an outer tank side wall 7. It consists of a dome-shaped outer tub upper lid 8 which is airtightly fixed to the upper end.

In this case, holes or the like cannot be formed in the outer tank bottom plate 6 and the outer tank side wall 7 made of reinforced concrete.

If holes are made in the outer tank bottom plate 6 and the outer tank side wall 7 made of reinforced concrete, there is a high risk that the stored liquid leaks out from the inner tank.

Therefore, the cryogenic fluid loading / unloading piping 15 and piping for each measuring device, which will be described later, all pass through the outer tank upper lid 8 and reach the inner tank 1 or the inner tank 1 and the outer tank 5. Also, an airtight metal plate 48 is attached or pasted over the entire inner surface of the outer tank bottom plate 6, the outer tank side wall 7, and the outer tank upper lid 8 of the outer tank 5 as illustrated in FIG. It has been.

On the airtight metal plate 48 (see FIG. 4) of the outer tank bottom plate 6 in the outer tank 5, as shown in FIG. 3, a tank support member / heat insulating material 10 is laid. An inner tank 1 is placed on the tank support member / heat insulating material 10.

Inner tank 1, for example, has a diameter of 80m and a height of 40m, and can store cryogenic liquid, 9%

It is a tank made of ultra low temperature resistant metal such as Ni steel plate.

The outer diameter of the outer tub 5 is about 82 to 84 m.

Therefore, a gap of about ˜2 m is provided between the outer surface of the inner tub 1 and the inner surface of the outer tub 5 in order to lay the cold insulation material.

[0042] The inner tank 1 includes a disk-shaped inner tank bottom plate 2, a cylindrical inner tank side wall 3 fixed on the inner tank bottom plate 2 by welding or the like, and a disk shape that covers the upper surface of the inner tank side wall 3. And an inner tank upper lid 4.

The diameter of the inner tank upper lid 4 is formed larger than the diameter of the inner tank side wall 3, and the inner tank upper lid 4 is provided with a short cylindrical ridge extending downward on the outer periphery thereof.

The inner tank upper lid 4 is suspended and supported from the outer tank upper lid 8 by a number of inner tank upper lid suspension fittings 9.

Note that the upper ends of a number of inner tank upper lid suspension fittings 9 are connected to an airtight metal plate 48 on the inner surface of the outer tank 5.

In this way, the inner tank upper lid 4 is fixed to the metal plate 48 on the inner surface of the outer tank 5 by the inner tank upper lid suspension metal fitting 9 so that the inner tank upper lid 4 and the inner tank side wall 3 are not mechanically in contact with each other. The tank upper lid 4 is not affected by the displacement of the inner tank side wall 3.

[0043] A heat insulating material 11 such as glass wool is attached or attached to the entire outer periphery of the inner tank side wall 3.

Furthermore, in the space between the heat insulating material 11 such as glass wool and the outer tank side wall 7 and the space on the upper surface of the inner tank upper lid 4, in order to prevent transmission of cold heat and leakage due to gas convection, for example, particulates such as pearlite Insulation 12 is filled and stored.

In addition, the short cylindrical bowl on the outer periphery of the inner tank upper lid 4 does not allow the particulate heat insulating material 12 such as pearlite to enter the inner tank 1 through the gap between the inner tank upper lid 4 and the upper end of the inner tank side wall 3. It is set to such a height.

A nitrogen gas supply pipe 24 is connected to the outer tank upper lid 8 in order to inject the nitrogen gas 14 cooled to a cryogenic temperature. The nitrogen gas supply pipe 24 passes between the outer surface of the inner tank side wall 3 and the inner surface of the outer tank 5, and is open below the inner tank bottom plate 2.

In maintenance and the like, nitrogen gas is purged from the nitrogen gas supply pipe 24, and methane gas, air, and the like between the inner tank 1 and the outer tank 5 are purged.

A cryogenic fluid inlet / outlet pipe 15 is provided so as to penetrate the outer tank upper lid 8, the airtight metal plate 48 and the inner tank upper lid 4.

A discharge pump 16 and a bell mouth 17 are attached to the lower end of the cryogenic fluid carry-in / out pipe 15.

The lower end of the cryogenic fluid loading / unloading pipe 15 is connected to the inner tank bottom plate 2 by a support 18 in order to suppress shaking, vibration and the like!

A barrel (not shown) having a diameter larger than that of the cryogenic fluid carry-in / out pipe 15 is fixed on the inner tank upper lid 4 by welding or the like.

The cryogenic fluid carry-in / out pipe 15 extends into the inner tank 1 through this barrel. The height of this barrel is set to such a height that particulate heat insulating material 12 such as pearlite does not enter the inner tank 1 through the gap between this barrel and the cryogenic fluid carry-in / out pipe 15! Being! /

In the cryogenic fluid carry-in / out pipe 15, a seal member (not shown) is provided in a through portion of the outer tank upper lid 8.

In addition, unillustrated piping for various measurements is also provided.

Further, as shown in FIGS. 1 and 2, four radial displacement measuring devices 26, two rotational displacement measuring devices 27, one inner tank height displacement measuring device 28, The pipe for the pipe shrinkage correction amount measuring device 29 is also attached so as to penetrate the outer tank upper lid 8 (upper part of the outer tank 5) and the inner tank upper lid 4 (upper part of the inner tank 1).

A vaporized gas recovery pipe 25 is attached near the top of the outer tank upper lid 8 as shown in FIG.

Then, the natural gas (methane gas or the like) that has vaporized and stays near the top of the outer tank upper lid 8 is recovered by the vaporized gas recovery pipe 25, liquefied again by a known reliquefaction device, and returned to the inner tank 1. It has become.

[0048] The double-shell tank shown in FIGS. 1 and 2 has a tank facility 9 as shown in FIG. 1 /! Multiple units (for example, 6 units) are installed!

In addition, it is not necessary to provide a breakwater such as that described in Patent Document 1 on the outer periphery of the tank facility 91. For example, a fence such as a wire mesh or the like is provided with other normal entry prevention enclosures.

In addition to the tank facility 91, a remote control monitoring center (building) in which a central computer having a tank monitoring device 70 (70a) is installed is installed!

The remote control monitoring center includes not only the tank monitoring device 70 (70a), but also the discharge pump control device 90, various circuits for monitoring the tank temperature and LNG level (circuits are subprograms, sequences, etc.). It also includes the form of blocks, processing cards, units, etc.), or a computer, storage device 78, display device 79, etc., which gather information and operation devices necessary for tank monitoring and operation. /!

[0049] (Configuration of radial displacement measuring device)

Next, a detailed configuration of the radial displacement measuring device 26 will be described with reference to FIGS.

Yes

As shown in Fig. 1 and Fig. 2, four radial displacement measurements are made up of radial displacement measuring pipes 30a, 30b, 30c, 30d, laser set distance measuring instruments 38a, 38b, 38c, 38d, etc. A device 26 is mounted at an equal angle in the same horizontal plane near the periphery of the outer tank upper lid 8 and the inner tank side wall 3.

This equal angle is 90 ° (allowable range: ± 20%) when there are four radial displacement measuring devices 26, 120 ° (allowable range: ± 20%) when three, and five It shall mean a predetermined angle of 72 ° (allowable range: ± 20%).

[0050] If it is assumed that the inner tank 1 is not distorted (not deformed into an ellipse, etc.), the two irradiation angles of the laser light are 90 ° (allowable range: ± 20%) in the horizontal plane. It is also possible to use only the laser type distance measuring devices 38a and 38b.

At this time, if the inner diameter Dt (radius) of the inner tank side wall 3 is 40 m, each radial displacement measuring device 26 is located at a position where the distance Dp from the center of the outer tank upper lid 8 is 38 to 39 m. It is preferable to attach it as close as possible to the inner surface.

[0051] That is, the distance Dp from the center is such that the inner tank 1 contracts and the inner tank 1 Even if it is deformed in the radial direction or rotational direction, the radial displacement measuring device 26 and the inner surface of the inner tank 1 are not in contact with each other!

The measuring force can be measured even with weak reflected light irregularly reflected on the inner surface of the inner tank side wall 3.

That is, the tangential direction of the inner surface of the inner tank side wall 3 at the irradiation point of the inner surfaces of the inner tank side walls 3 of laser beams 39a, 39b, 39c, 39d described later is not necessarily the optical axis of the laser beams 39a, 39b, 39c, 39d. This is because it is not always right-angled.

Therefore, the inner surface of the inner tank side wall 3 is not mirror-like! /, More preferred! /.

In addition, the difference between the inner diameter Dt of the inner tank side wall 3 and the distance Dp from the center of the outer tank upper lid 8 is such that the mirror enclosure 36 does not hit the inner tank side wall 3 even if the inner tank 1 is displaced. E.g. l ~ 2m

[0052] As shown in FIGS. 3 and 4, each radial displacement measuring device 26 includes a displacement measuring instrument storage box 34, laser-type distance measuring instruments 38a, 38b, 38c, 38d, and a radial displacement measuring pipe 30a. 30b, 30c, 30d, pipe side flange 41, mounting bolt nut ₄₄ , displacement measuring instrument storage box side flange 45, shut-off valve 35, mirror body storage enclosure 36, first for displacement measurement The mirror body 37, the outlet tube 40, the purge discharge pipe 22, the purge nitrogen gas supply pipe 23, and the like are included.

Note that the exit tube 40 is not necessarily required, and may be one in which holes for the laser beams 39a, 39b, 39c, and 39d are formed on the surface of the mirror body housing enclosure 36 that faces the inner tank side wall 3.

Next, a detailed configuration of the radial displacement measuring device 26 will be described with reference to FIGS. 3 and 4.

Pipes 30a, 30b, 30c and 30d for radial displacement measurement are provided vertically through the outer tank upper lid 8, the airtight metal plate 48 and the inner tank upper lid 4.

Radial displacement measuring pipes 30a, 30b, 30c, 30d are not shown in the part that penetrates the outer tank top lid 8 and the airtight metal plate 48 so that natural gas that should keep airtightness does not leak to the outside. The seal material is provided!

The radial displacement measuring pipes 30a, 30b, 30c, 30d are supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

[0054] Pipes for measuring radial displacement above the outer tank upper lid 8 (outside the outer tank 5) 30a, 30b, 30c, 3 At the upper end of Od, a pipe side flange 41 for connecting the laser type distance measuring instruments 38a, 38b, 38c, 38d is formed.

In addition, a shutoff valve 35 is interposed in each of the radial displacement measuring pipes 30a, 30b, 30c, and 30d between the outer tank upper lid 8 and the pipe-side flange 41.

A purge discharge pipe 22 having a shut-off valve is connected to the radial displacement measuring pipes 30a, 30b, 30c, 30d between the shut-off valve 35 and the pipe-side flange 41.

A displacement measuring device storage box 34 is detachably connected to the upper portion of each pipe side flange 41 by a displacement measuring device storage box side flange 45 and a mounting bolt nut 44. In the displacement measuring instrument storage box 34 are stored laser distance measuring instruments 38a, 38b, 38c, 38d for radial displacement measurement of an intrinsically safe explosion-proof type, a pressure-proof explosion-proof type or an internal pressure explosion-proof type.

The displacement measuring instrument storage box 34 and the laser distance measuring instruments 38a, 38b, 38c, 38d for measuring displacement stored in the displacement measuring instrument storage box 34 are intrinsically safe, explosion proof or internal pressure explosion proof. It has a structure with the performance of the mold.

Then, measured values of the existing radial displacement La, Lb, Lc, Ld (or measured values of the new radial displacement) measured by the laser distance measuring instrument 38a, 38b, 38c, 38d for measuring the radial displacement. Lma, Lmb, Lmc, and Lmd) are transmitted to the tank monitoring device 70 (70a) as described later.

A purge nitrogen gas supply pipe 23 provided with a shut-off valve is connected above the displacement measuring instrument storage box 34 to discharge oxygen, carbon dioxide and the like.

When measuring, the displacement measuring instrument storage box 34 containing the laser distance measuring instruments 38a, 38b, 38c, 38d is connected to the pipe side flange 41 with the mounting bolt nut 44 to supply nitrogen gas for purge. At room temperature, nitrogen gas is press-fitted from the pipe 23, and the purge discharge pipe 22 is displaced to discharge oxygen, carbon dioxide, etc. in the measuring instrument storage box 34, and then the shut-off valve 35 is opened.

It should be noted that the laser distance measuring instruments 38a, 38b, 38c, 38d may be permanently installed in each displacement measuring instrument storage box 34.

Alternatively, the laser distance measuring instruments 38a, 38b, 38c, 38d may be stored in a remote control monitoring center or the like and stored in each displacement measuring instrument storage box 34 only during measurement. Yes.

When storing in each displacement measuring instrument storage box 34 only at the time of measurement, the laser type distance measuring instruments 38a, 38b, 38c, 38d can be shared by attaching and detaching one measuring instrument as appropriate, thereby making the necessary measurements. The number of vessels can be reduced.

[0058] The inner tank upper lid 4 through which each of the radial displacement measuring pipes 30a, 30b, 30c, 30d penetrates has a large hole (diameter D2). A barrel 46 having a predetermined height for guiding the radial displacement measuring pipes 30a, 30b, 30c, 30d is attached by welding or the like.

The height of the barrel 46 is set such that the particulate heat insulating material 12 filled on the inner tank upper lid 4 does not enter the inner tank 1.

Also, the hole D of the interior upper lid 4 and the inner diameter D2 of the barrel 46 are the radial displacement measuring pipes 30a extending through the inner tank upper lid 4 and extending to the inner side of the inner tank 1 even if the inner layer upper lid 4 contracts during the cool down. Designed in consideration of the gap so as not to contact 30b, 30c, 30d.

For example, if the diameter D1 of the outer diameter of the diameter displacement measuring nozzles 30a, 30b, 30c, 30d is 100 m πι φ, and the amount of contraction of the inner tank top cover 4 during cool-down is 60 mm, the diameter D2 of the inner diameter of the barrel 46 D2 Is about 800mmφ.

The diameter D2 of the inner diameter of the barrel 46 is the radial displacement measuring pipes 30a, 30b, 30c, 30d force S, and is positioned on the radial center side of the inner tank top cover 4 in the barrel 46 before cooling down. It is preferable to make the diameter as small as possible so as to be positioned radially outward of the inner tank upper lid 4 in the barrel 46 after down.

[0059] On the upper surface of the barrel 46, a ring-shaped movable lid 47 is placed so as to be movable in the front, rear, left, right, and up directions.

In the center hole of this movable lid 47, radial displacement measuring pipes 30a, 30b, 30c, 30d force S are passed, and the movable lid 47 is not fixed to the measuring pipe or the barrel 46 and is free. Have a degree.

The diameter of the outer diameter of the movable lid 47 is about 1600πιιη φ so that no gap is generated when the radial displacement measuring pipes 30a, 30b, 30c, 30d are moved to any position of the barrel 46.

Figure 4 shows the gap between the radial displacement measurement type 30a, 30b, 30c, 30d and the nore 46. Actually, the pipes for radial displacement measurement 30a, 30b, 30c, and 30d have a diameter Dli up to 100 mm and a diameter 46 of the inner diameter 46. 2 is about 800mmφ.

[0060] A mirror body enclosure 36 is attached to the lower ends of the radial displacement measuring pipes 30a, 30b, 30c, 30d.

In the mirror body storage enclosure 36, a first mirror body 37 inclined by about 45 ° with respect to the vertical or horizontal direction is stored.

The inclination angle of the first mirror body 37 can be within a range of 45 ° ± 10%.

With this inclination angle, it is possible to measure the intensity of the racer light that has been diffusely reflected by the inner tank side wall 3 and returned.

The first mirror body 37 is made of stainless steel or the like, and the reflecting surface is polished in a mirror shape in order to improve the reflectivity of the laser beam.

Further, a cylindrical outlet tube 40 is attached at a position facing the inner tank side wall 3 on the side surface of the mirror body housing enclosure 36 so as to face the radial direction of the inner tank 1.

The mirror body enclosure! /, 36 and the outlet tube 40 can be located at the middle or bottom of the inner tank side wall 3 but, as shown in FIG. It is preferable to be located above the highest liquid level of the cryogenic liquid 13 in the inner tank 1 that is preferably located.

[0062] The radial displacement measuring pipes 30a, 30b, 30c, 30d, the mirror body enclosure 36, and the outlet cylinder 40 are opened in the inner tank 1, and the cryogenic liquid 13 is vaporized during the measurement. However, it enters the radial displacement measuring pipes 30a, 30b, 30c, 30d.

[0063] Each radial displacement measuring device 26 is configured as described above, and laser light 39a, 39b, 39c, 39d irradiated with each laser type distance measuring instrument 38a, 38b, 38c, 38d is Reflected by the first mirror body 37 and reaches the inner tank side wall 3.

A part of the laser beams 39a, 39b, 39c, 39d diffusely reflected by the inner tank side wall 3 passes through the outlet tube 40 and is reflected again by the first mirror bodies 37 to be reflected by each laser distance measuring device. 3 Return to 8a, 38b, 38c, 38d.

In this way, each laser type gyroscope J device 38a, 38b, 38c, 38d force, etc. Measured values of displacement in the radial direction, which is the distance to the inner tank side wall 3 via, La, Lb, Lc, Ld (or the first mirror surface from each laser type distance measuring device 38a, 38b, 38c, 38d The measured values of the displacement in the new radial direction, which is the distance from the body 37 to the inner tank side wall 3 (Lma, Lmb, Lmc, Lmd) are measured.

[0064] Note that the inner surfaces of the radial displacement measuring pipes 30a, 30b, 30c, 30d, the mirror body housing enclosure 36, and the outlet tube 40 may be treated or coated with a substance so as to absorb laser light. desirable.

Also, the radial displacement measurement pipes 30a, 30b, 30c, 30d, the mirror body enclosure 36, the first mirror body 37, and the outlet tube 40 are made of the same material so that they do not deform due to shrinkage differences during cool-down. It is preferable that

In addition, the portion irradiated with the laser light 39a, 39b, 39c, 39d on the inner tank side wall 3 need not be specially processed or treated if it is irregularly reflected! /.

However, if the measurement becomes unstable, such as when the distance between the racer lights 39a, 39b, 39c, and 39d becomes long, install a material that sufficiently reflects the laser beams 39a, 39b, 39c, and 39d. May be.

[0065] (Configuration of rotational direction displacement measuring device)

Next, the detailed configuration of the rotational direction displacement measuring device 27 will be described with reference to FIG. 1, FIG. 2, and FIG.

As shown in Fig. 1 and Fig. 2, two rotational direction displacement measuring devices 27 composed of rotational direction displacement measuring pipes 31a, 31b, laser distance measuring instruments 38e, 38f, etc. Near the periphery of the inner tank side wall 3, it is attached at an equal angle in the same horizontal plane. This equi-angle means 180 ° ± 20% when there are two rotational displacement measuring devices 27.

If it is assumed that the inner tank 1 is not distorted (not deformed into an ellipse or the like), it is possible to provide only one laser type distance measuring device 38e.

At this time, the distance Dp from the center of the outer tub upper lid 8 of each rotational direction displacement measuring device 27 is preferably the same as the mounting position of the radial direction displacement measuring device 26.

[0066] As shown in FIG. 5, each rotational direction displacement measuring device 27 includes the radial direction displacement meter shown in FIG. The same shape and size as the measuring device 26, displacement measuring instrument storage box 34, laser distance measuring instruments 38e, 38f, rotational displacement measuring pipes 31a, 31b (diameter D1), pipe side flange 41, mounting bolt nut 44, Displacement measuring instrument storage box side flange 45, shutoff valve 35, mirror body storage enclosure 36, second mirror body 37 for measuring rotation direction, outlet tube 40, purge discharge pipe 22, nitrogen gas supply pipe for purge It consists of 23 mag.

Further, the rotational displacement measuring pipes 31a and 31b are supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

Therefore, the distance L from the lower end of the laser type distance measuring device 38e, 38f (or the pipe side flange 41) to the second mirror body 37 is the laser type distance measuring device 38e of the radial displacement measuring device 26 shown in FIG. The distance L from the lower end of 38f (or! / Is the pipe side flange 41) to the mirror body 37 is the same.

[0067] Similarly to the radial direction displacement measuring device 26, the inner tank upper lid 4 through which each of the rotational direction displacement measuring pipes 31a and 31b penetrates has a large hole formed above the large hole. A barrel 46 (diameter D2) having a predetermined height for guiding the rotational displacement measuring pipes 31a and 31b is attached by welding or the like.

The height of the barrel 46 is set so that the particulate heat insulating material 12 filled on the inner tank upper lid 4 does not enter the inner tank 1, as in the radial displacement measuring device 26.

On the upper surface of the barrel 46, a ring-shaped movable lid 47 having the same shape as that of the radial displacement measuring device 26 is placed so as to be movable in the front-rear direction, the left-right direction, and the up-down direction.

[0068] The difference from the radial displacement measuring device 26 is that the mirror body is attached so that the irradiation direction of the reflected laser light is directed to the circumferential direction of the inner tank side wall 3.

Further, a vertical member 21 extending in the radial direction and the vertical direction of the inner tank side wall 3 is attached to the inner tank side wall 3 at a position facing the outlet tube 40 for each rotational direction displacement measuring device 27. .

[0069] Each rotational direction displacement measuring device 27 is configured as described above, and the laser beams 39e and 39f emitted from the laser distance measuring devices 38e and 38f are reflected by the second mirror bodies 37, respectively. Thus, the vertical member 21 is reached.

A part of the laser beams 39e and 39f irregularly reflected by the vertical member 21 passes through the exit tube 40. Then, it is reflected again by each second specular body 37 and returned to each laser type distance measuring device 38e, 38f.Thus, each laser type distance measuring device 38e, 38f passes through the first specular body 37. Measured value of displacement in the rotational direction, which is the distance to the vertical member 21 Le, Lf (or from each laser type distance measuring device 38a, 38b, 38c, 38d to the vertical member 21 via the first mirror body 37 Measured values (Lme, Lmf) of the new rotational displacement, which is the distance of.

The measured values Le and Lf of the existing rotational displacement measured by the laser distance measuring instruments 38e and 38f (or the measured values Lme and Lmf of the new rotational displacement) are stored in a tank monitoring device 70 (70a described later). ).

[0070] (Configuration of inner tank height direction displacement measuring device)

Next, the detailed configuration of the inner tank height direction displacement measuring device 28 will be described with reference to FIG. 1, FIG. 2, and FIG.

As shown in Fig. 1 and Fig. 2, the inner tank height direction displacement measuring device 28 composed of the inner tank height direction displacement measuring pipe 32, laser type distance measuring device 38g, etc. It is attached near the periphery of the outer tank upper lid 8 and the inner tank side wall 3.

At this time, the distance Dp from the center of the outer tank upper lid 8 of the inner tank height direction displacement measuring device 28 is preferably the same as the mounting position of the radial direction displacement measuring device 26.

[0071] As shown in FIG. 6, the inner tank height direction displacement measuring device 28 has the radial direction shown in FIG. 4 except that the mirror body housing enclosure 36, the mirror body 37 and the outlet tube 40 are not provided. The same shape and size as the displacement measuring device 26, displacement measuring instrument storage box 34, laser distance measuring instrument 38g, inner tank height direction displacement measuring pipe 32 (diameter D1), pipe side flange 41, mounting bolt It consists of a nut 44, a displacement measuring instrument storage box side flange 45, a shutoff valve 35, a purge discharge pipe 22, a purge nitrogen gas supply pipe 23, and the like.

The pipe 32 for measuring the displacement in the height direction of the inner tank is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

[0072] Similarly to the radial direction displacement measuring device 26, the inner tank upper lid 4 through which the inner tank height direction displacement measuring pipe 32 penetrates has large holes, respectively. The barrel 46 (diameter D having a predetermined height) that guides the pipe 32 for measuring the displacement of the inner tank in the height direction. 2) is attached by welding or the like.

On the upper surface of the barrel 46, a ring-shaped movable lid 47 having the same shape as that of the radial displacement measuring device 26 is placed so as to be movable in the front-rear and left-right directions.

[0073] The difference from the radial displacement measuring device 26 is that the mirror body housing enclosure! /, 36, the mirror body 37 and the exit tube 40 shown in FIG.

The inner tank side wall 3 includes a horizontal member 20 for measuring the displacement in the height direction of the inner tank extending in the radial direction and the horizontal direction of the inner tank side wall 3 and a pipe 32 for measuring the height displacement of the inner tank. It is attached at the opposite position.

The inner tank height direction displacement measuring device 28 is configured as described above, and the laser light 39 g emitted from each laser-type distance measuring device 38 g reaches the horizontal member 20.

A part of the laser beam 39g irregularly reflected by the horizontal member 20 returns to the laser distance meter 38g.

In this way, the measurement value Lg of the displacement in the height direction of the existing inner tank from each laser type distance measuring device 38g to the horizontal member 20 (or the measurement value Lmg of the displacement in the height direction of the new inner tank) is measured. The The measured value Lg of the displacement in the height direction of the existing inner tank measured by the laser distance measuring device 38g (or the measured value Lmg of the displacement in the height direction of the new inner tank) is stored in a tank monitoring device 70 (described later). 70a) is sent!

[0075] (Configuration of pipe shrinkage correction amount measuring device)

Next, the detailed configuration of the Neuve contraction correction amount measuring device 29 will be described with reference to FIGS. 1, 2, and 7. FIG.

As shown in Fig. 1 and Fig. 2, one pipe contraction correction amount measuring device 29 composed of pipe contraction correction pipe 33, laser type distance measuring instrument 38h, etc. is connected to outer tank upper lid 8 and inner tank side wall. Installed near the periphery of 3! /

At this time, the distance Dp from the center of the outer tub upper lid 8 of the pipe shrinkage correction amount measuring device 29 is also set to the same mounting position of the radial direction displacement measuring device 26 and the rotational direction displacement measuring device 27.

[0076] As shown in Fig. 7, the pipe contraction correction amount measuring device 29 is used for correcting pipe contraction. The same shape and size as the radial displacement measuring device 26 and the rotational displacement measuring device 27 shown in FIGS. 4 and 5, except that the horizontal member 37d is horizontally attached to the lower end of the eve and there is no outlet tube 40. The displacement measuring instrument storage box 34, laser distance measuring instrument 38h, pipe compression pipe 33 (diameter D1), pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45, shut off It consists of a valve 35, a purge discharge pipe 22, a purge nitrogen gas supply pipe 23, and the like.

The pipe contraction correcting pipe 33 is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

[0077] Similarly to the radial direction displacement measuring device 26 and the rotational direction displacement measuring device 27, each of the inner tank upper lids 4 through which the pipe contraction correcting pipe 33 passes has a large hole, and this Above the large hole, a barrel 46 (diameter D2) having a predetermined height for guiding the pipe contraction correcting pipe 33 is attached by welding or the like.

The height of the barrel 46 is the same as that of the radial displacement measuring device 26 or the rotational displacement measuring device 27 so that the particulate heat insulating material 12 filled on the inner tank upper lid 4 does not enter the inner tank 1. With a height.

On the upper surface of the barrel 46, a ring-shaped movable lid 47 having the same shape as that of the radial direction displacement measuring device 26 or the rotational direction displacement measuring device 27 is movably mounted.

[0078] As described above, the difference between the radial displacement measuring device 26 and the rotational displacement measuring device 27 is that a horizontal member 37d is placed at the lower end of the pipe in the mirror body enclosure 36 as shown in FIG. It is in the point attached to the flat.

The surface of the horizontal member 37d at the lower end of the pipe is reflected by a laser beam 39h that is not mirror-like.

At this time, the distance L from the lower end (or pipe side flange 41) of the laser distance measuring device 38h to the horizontal member 37d at the lower end of the pipe is the same as the distance L shown in FIG. 4 and the distance L shown in FIG. To do.

The pipe contraction correction amount measuring device 29 is configured as described above, and the laser light 39h emitted from each laser distance measuring device 38h reaches the horizontal member 37d at the lower end of the pipe. A part of the laser beam 39h irregularly reflected by the horizontal member 37d at the lower end of the pipe returns to the laser set distance measuring device 38h.

In this way, the measured length Lh (or the measured value Lmh of the new pipe length) from each laser type distance measuring device 38h to the horizontal member 37d at the lower end of the pipe is measured.

Then, the pipe length measurement value Lh (or the new pipe length measurement value Lmh) measured by the laser distance measuring device 38h is transmitted to the tank monitoring device 70 (70a) described later. .

[0080] If it is not necessary to measure the displacement (mainly contraction) of the inner tank 1 before and after the cool-down, or if the displacement (mainly contraction) of the inner tank 1 before and after the cool-down can be estimated, it is not always necessary. Pipe shrinkage correction measuring device 29 is not necessary!

However, by providing the pipe shrinkage correction amount measuring device 29, the displacement of the inner tank 1 before and after the cool-down (not only shrinkage but also radial displacement and rotational displacement) can be reliably measured. Can do.

[0081] (Second Embodiment of the Present Invention)

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a second embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a detailed side view of the radial displacement measuring device 26a or the rotational displacement measuring device 27a of the double-shell structure tank according to the second embodiment of the present invention.

The tank displacement measuring device according to the second embodiment of the present invention includes four (at least two) radial displacement measuring devices 26a, two (at least one) rotational displacement measuring devices 27a, and In the same manner as in the first and second embodiments of the present invention, it is composed of one inner tank height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29 and a tank monitoring device 70 (70a). ing.

The inner tank side wall 3 is provided with a horizontal member 20 for measuring the displacement of the inner tank in the height direction and two (at least one) vertical member 21 for measuring the tank rotation.

Details of the tank monitoring device 70 (70a) will be described later.

The difference from the tank displacement measuring apparatus according to the first embodiment of the present invention is that a radial displacement measuring apparatus 26 and a rotational displacement measuring apparatus 27 shown in FIGS. 4 and 5 are shown in FIG. As In addition, the radial direction displacement measuring device 26a and the rotational direction displacement measuring device 27a are omitted.

Other configurations such as the inner tank height direction displacement measuring device 28 (see FIG. 6), the pipe shrinkage correction amount measuring device 29 (see FIG. 7), etc. are those of the first embodiment of the present invention. The same thing is provided.

That is, as shown in FIG. 8, each radial displacement measuring device 26a includes a displacement measuring device storage box 34, laser type distance measuring devices _38a , 38b, 38c, 38d, a radial displacement measuring pipe 30a, 30 b, 30c, 30d (D1 diameter), pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage side flange 45, shut-off valve 35, mirror body 37, outlet cylinder 40, purge discharge pipe 22, purge It is composed of a nitrogen gas supply pipe 23 and the like.

Each rotational direction displacement measuring device 27 has the same shape and size as the radial direction displacement measuring device 26, and includes a displacement measuring device storage box 34, laser distance measuring devices 38e and 38f, and a rotational direction displacement measuring pipe 31a. 31b, pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45, shutoff valve 35, mirror body 37, outlet tube 40, purge discharge pipe 22, purge nitrogen gas supply pipe 23, etc. Has been.

Also, the radial displacement measuring pipes 30a, 30b, 30c, 30d and the rotational displacement measuring pipes 31a, 31b are supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8. Has been.

[0084] The radial displacement measuring pipes 30a, 30b, 30c, 30d and the rotational displacement measuring pipes 3la, 31b have the mirror body 37 directly at 45 ° ± 20% diagonally with respect to the vertical or horizontal direction. The radial displacement measuring device 26a and the rotational displacement measuring device 27a

[0085] On the lower side surfaces of the radial direction displacement measuring pipes 30a, 30b, 30c, 30d and the rotational direction displacement measuring pipes 3la, 31b, holes for passing laser light are formed.

An outlet tube 40 is attached to the hole.

Note that the outlet tube 40 is not necessarily required, but may simply be a hole. In addition, the radial displacement measuring pipes 30a, 30b, 30c, 30d, the mirror body 37, and the outlet tube 40 are preferably made of the same material so that they do not deform due to a shrinkage difference during cool-down. Yes.

[0086] According to the above-described double-shell structure tank device, tank displacement measuring device, or tank facility according to the second embodiment of the present invention, the first embodiment of the present invention is used. The structures of the radial displacement measuring pipes 30a, 30b, 30c, 30d and the rotational displacement measuring pipes 31a, 3 lb can be simplified.

[0087] (Third embodiment of the present invention)

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a third embodiment of the present invention will be described with reference to FIG.

FIG. 9 is a detailed side view of the radial displacement measuring device 26b of the double-shell structure tank according to the third embodiment of the present invention.

The tank displacement measuring device according to the third embodiment of the present invention includes one radial displacement measuring device 26b, two (at least one) rotational displacement measuring devices 27, 27a, and one inner tank. The height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29 and a tank monitoring device 70 are included.

Details of the tank monitoring device 70 will be described later.

The difference from the tank displacement measuring apparatus according to the first and second embodiments of the present invention is that the radial displacement measuring apparatus 26 is used to measure a plurality of radial displacements as shown in FIG. One radial displacement measuring device 26b is possible.

In the following, the force is described in the case of measuring four directions as an example. The measurement can be similarly performed in the case of measuring in two directions, three directions or more than five directions.

Other configurations, rotational direction displacement measuring device 27, 27a (see Fig. 5 and Fig. 9), inner tank height direction displacement measuring device 28 (see Fig. 6), pipe shrinkage correction amount measuring device 29 (see Fig. 7) ) And the like are the same as those in the first and second embodiments of the present invention.

That is, as shown in FIG. 9, the radial displacement measuring device 26b has one displacement measuring instrument storage box.

34, 1 displacement measuring instrument storage box 4 laser-type distance measuring instruments 38a, 38b, 38c, 38d, radial displacement measuring pipe 30, pipe side flange 41, mounting bolt Nut 44, Displacement measuring instrument storage box side flange 45, shutoff valve 35, one mirror body storage enclosure 36 in the shape of a quadrangular pyramid 37, outlet cylinder 40, purge discharge pipe 22, purge nitrogen It consists of a gas supply pipe 23 and the like.

The radial displacement measuring pipe 30 is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

[0090] The four laser-type distance measuring instruments 38a, 36b, 36c, 36d are stored in one displacement measuring instrument storage box 34.

The four mirror bodies 37 are also attached in the shape of a quadrangular pyramid in one mirror body housing enclosure 36. Outlet tubes 40 are attached to the four side surfaces of the mirror body storage enclosure 36, respectively. Note that the outlet tube 40 is not necessarily required, but may simply be a hole. In addition, the radial displacement measuring device 26b has the laser light 39a, 39b, 39c, 39d force emitted from the outlet tube 40, respectively, and the cryogenic fluid loading / unloading pipe 15 shown in FIGS. Installed at a position where it does not interfere with the measurement pipe.

The diameter D3 of the radial displacement measuring pipe 30 is preferably about 200 mm.

The inner diameter D4 of the barrel 46 is about 900 mmφ.

[0091] According to the displacement measuring apparatus for the double-shell structure tank according to the third embodiment of the present invention, the radial displacement measurement is performed 1 for the first and second embodiments of the present invention. Since it can be integrated into the individual radial displacement measuring device 26b, there is an advantage that the mounting becomes easy.

[0092] (Fourth embodiment of the present invention)

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a fourth embodiment of the present invention will be described with reference to FIG.

FIG. 10 is a detailed side view of the radial displacement measuring device 26c of the double-shell structure tank according to the fourth embodiment of the present invention.

The tank displacement measuring device according to the fourth embodiment of the present invention includes one radial displacement measuring device 26c, two (at least one) rotational displacement measuring devices 27, 27a, and one inner tank. The height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29 and a tank monitoring device 70 are included. The radial displacement measuring pipe 30 is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

Details of the tank monitoring device 70 will be described later.

A difference from the tank displacement measuring apparatus (see FIG. 9) according to the third embodiment of the present invention is that the radial displacement measuring apparatus 26 is replaced with a displacement measuring instrument storage box as shown in FIG. 34 is a point where one laser set distance measuring device 38 and a laser beam path changing device 43 are accommodated.

Other configurations, rotational displacement measuring devices 27, 27a (see Fig. 5 and Fig. 8), inner tank height displacement measuring device 28 (see Fig. 6), pipe shrinkage correction measuring device 29 (see Fig. 7) ) Etc. are the same as those of the first, second and third embodiments of the present invention.

That is, as shown in FIG. 10, the radial displacement measuring device 26c includes one displacement measuring device storage box 34, one laser distance measuring device 38, a laser beam path changing device 43, a radial displacement. Pipe 30 for measurement, Nove side flange 41, Mounting bolt nut 44, Displacement measuring instrument storage box side flange 45, Shut-off valve 35, One mirror body storage enclosure 36 Specular body 37 stored in a square pyramid shape, It is composed of the outlet tube 40, the purge discharge pipe 22, the purge nitrogen gas supply pipe 23, etc. Note that the outlet tube 40 is not necessarily required, but may be a simple hole.

On the upper surface of the pipe-side flange 41, a laser light transmission pressure-resistant plate 42 capable of transmitting laser light is attached by a mounting bolt nut 44.

A displacement measuring instrument storage box 34 having a displacement measuring instrument storage box side flange 45 is connected to the upper surface of the laser light transmission pressure-resistant plate 42.

In the displacement measuring instrument storage box 34, one laser distance measuring instrument 38 and a laser beam path changing instrument 43 for changing the optical path of the laser beam emitted from the laser distance measuring instrument 38 are stored.

[0096] The laser beam path changer 43 may be constituted by, for example, two reflecting plates, and the two reflecting plates may be turned by a turning device (not shown). Alternatively, the laser type distance measuring device 38 may have a structure in which the direction of the laser type distance measuring device 38 is changed by a driving device (not shown).

[0097] According to the displacement measuring apparatus for a double-shell structure tank according to the fourth embodiment of the present invention, the laser type is further different from that of the third embodiment (see Fig. 9) of the present invention. The number of distance measuring devices 38 can be reduced.

[0098] (Fifth embodiment of the present invention)

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a fifth embodiment of the present invention will be described with reference to FIG.

FIG. 11 is a detailed side view of the radial displacement measuring device 26d for the double-shell structure tank according to the fifth embodiment of the present invention.

The tank displacement measuring device according to the fifth embodiment of the present invention includes one radial displacement measuring device 26d, two (at least one) rotational displacement measuring devices 27, 27a, and one inner tank. The height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29 and a tank monitoring device 70 are included.

Details of the tank monitoring device 70 will be described later.

[0099] The difference from the tank displacement measuring device (see FIG. 9) according to the third embodiment of the present invention is that the radial displacement measuring device 26d is replaced with a displacement measuring device storage box as shown in FIG. One laser distance measuring instrument 38 is eccentrically stored in 34.

That is, as shown in FIG. 11, the radial displacement measuring device 26d includes one displacement measuring device storage box 34 and one laser type distance measuring device 38, and the third embodiment of the present invention. The same radial displacement measurement pipe 30, pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45, shut-off valve 35, one mirror body storage enclosure 36 with a square pyramid Mirror body 37, outlet tube 40, purge discharge pipe 22, and supply of purge nitrogen gas It consists of tube 23.

The outlet tube 40 is not necessarily required, and it may be a simple hole.

Yes

[0101] On the upper surface of the nove side flange 41, a displacement measuring instrument storage box 34 is attached by a mounting bolt nut 44.

In this displacement measuring instrument storage box 34, one laser type distance measuring instrument 38 is stored eccentrically.

In this case, the displacement measuring instrument storage box side flange 45 of the displacement measuring instrument storage box 34 is attached to the pipe side flange 41 by the mounting bolt nut 44 at the positions of 0 °, 90 °, 180 ° and 270 °. Has become possible.

[0102] According to the displacement measuring apparatus for the double-shell structure tank according to the fifth embodiment of the present invention, the laser beam path is further changed from that of the fourth embodiment (see Fig. 10) of the present invention. There is an advantage that it is possible to omit the vessel 43.

[Sixth Embodiment of the Present Invention]

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a sixth embodiment of the present invention will be described with reference to FIG.

FIG. 12 is a detailed side view of the radial and rotational displacement measuring device 26e of the double-shell structure tank according to the sixth embodiment of the present invention.

The tank displacement measuring device according to the sixth embodiment of the present invention includes two radial displacement measuring devices 26e that also serve to measure two rotational displacements, and two rotational displacement measuring devices 27, 27a, and one The inner tank height direction displacement measuring device 28, one pipe contraction correction amount measuring device 29, and a tank monitoring device 70 (70a).

Further, a horizontal member 20 for measuring the displacement in the height direction of the inner tank and two vertical members 21 for measuring the rotation of the tank are attached to the inner tank side wall 3.

Details of the tank monitoring device 70 (70a) will be described later.

[0104] The difference from the tank displacement measuring devices (see Figs. 1 to 8) according to the first and second embodiments of the present invention is that four radial displacement measuring devices 26a, 26b, 26c, 26d Of these, for example, two radial displacement measuring devices 26 can be used to measure the rotational displacement as shown in FIG. The direction and rotation direction displacement measuring device 26e is used.

For other configurations, the other two radial displacement measuring devices 26, inner tank height direction measuring device 28 (see Fig. 6), pipe shrinkage compensation measuring device 29 (see Fig. 7), etc. The same as those of the first and second embodiments of the present invention are provided.

That is, as shown in FIG. 12, the radial direction displacement measuring device 26 e, which is also a rotational direction displacement measuring type, includes one displacement measuring instrument storage box 34 and one laser type distance measuring instrument 38. Pipe for radial and rotational displacement measurement 30e, pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45, shut-off valve 35, one mirror body storage enclosure 36 in a square pyramid shape It consists of two stored mirror bodies 37b, an outlet tube 40, a purge discharge pipe 22 and a purge nitrogen gas supply pipe 23.

Further, the radial / rotational displacement measuring pipe 30e is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

Note that the outlet tube 40 is not necessarily required, but may simply be a hole. In this case, the diameter D5 of the radial / rotational displacement measuring pipe 30e is preferably about 150 mm.

The inner diameter D6 of the barrel 46 can be about 850 mmφ.

A displacement measuring instrument storage box 34 is attached to the upper surface of the nove side flange 41 with mounting bolts and nuts 44.

In this case, the displacement measuring instrument storage box side flange 45 of the displacement measuring instrument storage box 34 is positioned at 0 °, 90 ° (or 0 °, 180 °) with respect to the pipe side flange 41 by the mounting bolt nut 44. It can be attached.

[0107] When the displacement measuring instrument storage box side flange 45 is connected to the pipe side flange 41 at a position of 0 °, the laser beams 39b and 39d reflected by the mirror body 37b are applied to the inner tank side wall 3. Because it is irradiated, the radial displacement is measured.

When the displacement measuring instrument storage box side flange 45 is connected to the pipe side flange 41 at a position of 90 ° (or 180 °), the laser beam 39e reflected by the mirror body 37b Since the vertical member 21 for measuring the rotation of the shaft is irradiated, the displacement in the rotational direction is measured.

In this way, from the two radial / rotational displacement measuring devices 26e, the measured values Lb and Ld of the existing radial displacement, the measured values Le and Lf of the existing rotational displacement, or the new radial direction Displacement measurement (Lmb, Lmd, Lme, Lmf) is measured.

From the other two radial displacement measuring devices 26, the measured values La, Lc of the existing radial displacement (or the measured values Lma, Lmc of the new radial displacement) are the same as in the first embodiment. Is measured. These measured values are transmitted to a tank monitoring device 70 (70a) described later.

[0109] According to the displacement measuring apparatus for the double-shell structure tank according to the sixth embodiment of the present invention, the rotation measuring device 27 dedicated to the rotational direction displacement measuring apparatus 27 is different from that of the third embodiment of the present invention Direction Displacement measurement pipes 31a and 31b have the advantage that they can be omitted.

[0110] (Seventh embodiment of the present invention)

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a seventh embodiment of the present invention will be described with reference to FIG.

FIG. 13 is a detailed side view of the radial displacement and pipe contraction correction amount measuring apparatus of the double-shell structure tank according to the seventh embodiment of the present invention.

The tank displacement measuring device according to the seventh embodiment of the present invention includes a radial displacement / pipe shrinkage correction amount measuring device 26f that also serves to measure one pipe shrinkage correction amount, and three rotational direction displacement measuring devices. 27, 27a, It consists of one inner tank height direction displacement measuring device 28 and tank monitoring device 70.

Details of the tank monitoring device 70 will be described later.

[0111] The difference from the tank displacement measuring devices (see Figs. 1 to 8) according to the first and second embodiments of the present invention is that four radial displacement measuring devices 26a, 26b, 26c, 26d Among them, for example, one radial displacement measuring device 26d is used as a radial displacement and pipe shrinkage correction amount measuring device 26f that also serves to measure the pipe shrinkage correction amount as shown in FIG.

Three other radial displacement measuring devices 26a, 26b, 26c, the height direction of the inner tank The displacement measuring device 28 (see FIG. 6) and the like are the same as those in the first and second embodiments of the present invention.

That is, as shown in FIG. 13, the radial displacement measuring device 26f that also measures the pipe contraction correction amount includes one displacement measuring device storage box 34, one laser type distance measuring device 38, and The laser beam path changer 43 shown in Fig. 10, the radial displacement and pipe contraction correction amount measuring pipe 30 f, the pipe side flange 41, the mounting bolt nut 44, the displacement measuring instrument storage box side flange 45, the cutoff valve 35, 1 The mirror body 37c and the horizontal horizontal member 37d at the lower end of the inclined pipe housed in the mirror body housing enclosure 36, the mirror body 37, the outlet tube 40, the purge discharge pipe 22 and the purge nitrogen gas supply pipe 23 It is configured.

Further, the radial displacement and pipe contraction correction amount measuring pipe 30f is supported by a pipe support 19 attached to the lower surface of the metal plate 48 of the outer tank upper lid 8.

Note that the outlet tube 40 is not necessarily required, but may simply be a hole. In this case, the diameter D5 of the radial displacement and pipe contraction correction amount measuring pipe 30f is preferably about 150 mm.

The inner diameter D6 of the barrel 46 can be about 850 mmφ.

[0113] In such a configuration, the laser light 39d positioned on the right side of the radial displacement and pipe contraction correction amount measuring pipe 30f is reflected by the mirror body 37c at the lower end of the inclined pipe and applied to the inner tank side wall 3. Therefore, the radial displacement is measured.

In addition, since the laser beam 39h located on the left side of the pipe 30f in the radial direction is reflected and returned by the horizontal member 37d, the pipe contraction correction amount is measured.

Yes

[0114] In this way, from the radial displacement and pipe contraction correction amount measuring device 26f, the measured value Ld of the existing radial displacement, the measured value Lh of the existing pipe length (or the measured value Lmd of the new radial displacement Lmd). The new pipe length measurement (Lmh) is measured.

The other three radial displacement measuring devices 26 measure the measured values La, Lb, and Lc of the existing radial displacement (or the measured values Lma, Lmb, and Lmc of the new radial displacement).

These measured values are transmitted to the tank monitoring device 70 described later. [0115] According to the displacement measuring apparatus for the double-shell structure tank according to the seventh embodiment of the present invention, the pipe contraction correction amount measuring apparatus 29 is different from that of the first and second embodiments of the present invention. There is an advantage that the dedicated pipe shrinkage compensation pipe 33 can be omitted.

[Eighth Embodiment of the Invention]

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to an eighth embodiment of the present invention will be described.

In the double-shell structure tank device and the tank displacement measuring device according to the first to sixth embodiments of the present invention, the pipe contraction correction amount measurement is performed by providing a dedicated laser-type distance measuring device 38h before and after the cool-down. Correct the amount of expansion / contraction of the pipe contraction correction pipe 33!

[0117] On the other hand, in the present embodiment, instead of the laser-type distance measuring device 38h, a multi-pair thermometer is installed on the inner surface of the pipe contraction correction pipe 33 for each lm, and the constant The temperature of the interval is monitored, and the pipe contraction amount is corrected by calculating the contraction amount of the pipe contraction correction pipe 33 in the vicinity of each thermometer based on the measured temperature of each thermometer. Is.

[Ninth embodiment of the present invention]

Next, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a ninth embodiment of the present invention will be described with reference to FIGS.

FIG. 14 is a partial cross-sectional side view of a radial displacement measuring device for a double-shell structure tank according to a ninth embodiment of the present invention.

FIG. 15 is an enlarged view of part A in FIG.

FIG. 17 is a partial cross-sectional side view of the height direction displacement measuring device for the inner tank of the double-shell structure tank according to the ninth embodiment of the present invention.

FIG. 18 is an enlarged view of part B in FIG.

[0119] The tank displacement measuring device according to the ninth embodiment of the present invention has four (at least two) radial displacement measuring devices 50 as in the first embodiment of the present invention. 2 (at least 1) rotational direction displacement measuring device 51, 1 inner tank height direction displacement measuring device 52 and Consists of tank monitoring device 70 (70a)!

[0120] The difference from the first embodiment of the present invention is that, as will be described later, the pipe for each measuring device is located between the inner tank side wall 3 and the outer tank 5 (the outer surface side of the inner tank side wall 3). )

Yes

In addition, since the particulate heat insulating material 12 etc. is filled between the inner tank side wall 3 and the outer tank 5, the temperature around each pipe is negligible for the contraction amount of the pipe where the temperature difference is almost the same as the temperature of the outside air. it can.

Therefore, the pipe contraction correction amount measuring device 29 in the first embodiment of the present invention is not necessary.

On the other hand, a structure for ensuring the measurement position in the filler is provided.

Specifically, a connection pipe that connects each measurement position and the measurement pipe is provided.

The overall structure of the double-shell structure tank is the same as that of the first embodiment of the present invention.

The same reference numerals as those in the first embodiment of the present invention are the same constituent members.

[0121] (Configuration of radial displacement measuring device)

First, a detailed configuration of the radial displacement measuring device 50 will be described with reference to FIGS. As shown in FIG. 14, four radial displacement measuring devices 50 constituted by radial displacement measuring pipes 55a, 55b, 55c, 55d, laser distance measuring instruments 38a, 38b, 38c, 38d, etc. However, the metal plate 48 on the inner surface of the outer tank 5 and the inner tank side wall 3 are attached at equal angles on the same horizontal plane.

[0122] Each radial displacement measuring device 50 includes a displacement measuring instrument storage box 34, laser distance measuring instruments 38a, 38b, 38c, 38d, radial displacement measuring type 55a, 55b, 55c, 55d, laser transmission / reception. Pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45, shut-off valve 35, mirror body storage enclosure 59, displacement measurement mirror surface body 60, outlet pipe 62, inner tank wall It is composed of a connecting bellows 63 and the like.

[0123] Each of the radial displacement measuring pipes 55a, 55b, 55c, 55d extends through the outer tank upper lid 8 and the airtight metal plate 48, extends in the vertical direction, and the metal plate 48 on the inner surface of the outer tank 5 And the inner tank side wall 3 so as to pass between the inner tank side wall 3 and the inner tank side wall 3. For the radial displacement measurement 55a, 55b, 55c, 55d, seals (not shown) are installed so that natural gas that should keep airtightness does not leak to the outside where the outer tank top lid 8 and the airtight metal plate 48 penetrate. Materials are provided!

The lower part of the radial displacement measuring pipe 55a, 55b, 55c, 55d is supported by a pipe plate 61 that extends horizontally in the direction of the center of the tank.

[0124] The tank center side of the mirror body enclosure 59 is fixed to the outlet pipe 62 fixed to the side surface of the mirror body enclosure 59, and both ends are fixed to the outlet pipe 62 and the outer surface of the inner tank side wall 3 as the connection pipe described above. The inner tank wall connecting bellows 63 is connected to the outer surface of the inner tank side wall 3 so that it can cope with the deformation of the inner tank 1 in the radial direction and the rotation direction.

[0125] Each radial displacement measuring device 50 is configured as described above, and each laser type distance measuring device 38a, 38b, 38c, 38d is irradiated with laser light 39a, 39b, 39c, 39d. The light is reflected by the mirror body 60, passes through the outlet pipe 62 and the inner tank wall connecting bellows 63, and reaches the outer surface of the inner tank side wall 3.

Then, some of the laser beams 39a, 39b, 39c, 39d diffusely reflected on the outer surface of the inner tank side wall 3 pass through the inner tank wall connecting bellows 63 and the outlet pipe 62 again, and are reflected by each mirror body 60. Return to each laser set distance measuring instrument 38a, 38b, 38c, 38d.

In this way, the measured value of the radial displacement from each laser type distance measuring instrument 38a, 38b, 38c, 38d to the outer surface of the inner tank side wall 3 is measured.

Then, the radial displacement measurement values measured by the laser-type distance measuring devices 38a, 38b, 38c, and 38d for radial displacement measurement are transmitted to the tank monitoring device 70 (70a) as described later. It has become.

[0127] (Configuration of rotational displacement measuring device)

Next, a detailed configuration of the rotational direction displacement measuring device 51 will be described with reference to FIG. As shown in FIG. 16, two rotational direction displacement measuring devices 51 constituted by a rotational direction displacement measuring pipe (not shown), laser type distance measuring devices 38e, 38f, etc. are connected to a metal plate on the inner surface of the outer tub 5. 48 and the inner tank side wall 3 are mounted at the same angle (180 ° ± 20%) in the same horizontal plane. Further, two vertical members 69 for tank rotation measurement are attached to the outer surface of the inner tank side wall 3.

The other configuration is the same as that of the radial displacement measuring device 50 except that one end of the inner tank wall connecting bellows is fixed to the vertical member 69.

[0128] Each rotational direction displacement measuring device 51 is configured as described above, and the laser beams 39e and 39f emitted from the laser type distance measuring devices 38e and 38f are reflected by the mirror bodies to be a vertical member. Reach 69.

Then, some of the laser beams 39e and 39f irregularly reflected by the vertical member 69 are reflected again by the mirror bodies and return to the laser distance measuring devices 38e and 38f.

In this way, the measured value of the displacement in the rotational direction from each laser type distance measuring device 38e, 38f to the vertical member 69 is measured.

Then, the measurement value of the rotational displacement measured by the laser type distance measuring devices 38e and 38f is transmitted to a tank monitoring device 70 (70a) described later.

[0129] (Configuration of inner tank height direction displacement measuring device)

Next, a detailed configuration of the inner tank height direction displacement measuring device 52 will be described with reference to FIG. 17 and FIG.

As shown in Fig. 17, the inner tank height direction displacement measuring device 52 composed of the inner tank height direction displacement measuring pipe 57, the laser distance measuring device 38g, etc. And through the metal plate 48 and attached along the inside of the outer tank side wall 7.

At this time, the distance from the center of the outer tank upper lid 8 of the inner tank height direction displacement measuring device 52 is preferably the same as the mounting position of the radial direction displacement measuring device 50.

[0130] Inner tank height direction displacement measuring device 52 is composed of a displacement measuring instrument storage box 34, a laser type distance measuring device 38g, an inner tank height direction displacement measuring pipe 57, a pipe side flange 41, and a mounting bolt nut 44. The displacement measuring instrument storage box side flange 45, the shutoff valve 35, and the like.

Further, a horizontal member support leg 64 extending upward is attached to the outer upper portion of the inner tank side wall 3, and a horizontal member 65 for measuring the displacement in the height direction of the inner tank is attached to the upper end of the horizontal member support leg 64. Is installed.

The inner tank height direction displacement measuring pipe 57 and the inner tank height direction displacement measuring pipe 57 The member 65 is connected by a horizontal member connecting bellows 66.

[0131] The inner tank height direction displacement measuring device 52 is configured as described above, and the laser light emitted from each laser-type distance measuring device 38g is a horizontal member for measuring the inner tank height direction displacement. Reach 65.

Then, a part of the laser beam irregularly reflected by the horizontal member 65 for measuring the displacement in the height direction of the inner tank returns to the laser distance measuring device 38g.

In this way, the measured value Lg of the displacement in the height direction of the inner tank from the laser type distance measuring device 38g to the horizontal member 65 for measuring the displacement in the height direction of the inner tank is measured.

Then, the measurement Lg of the displacement in the height direction of the existing tank measured by the laser distance measuring device 38g is transmitted to the tank monitoring device 70 (70a) described later.

[0132] (Tenth embodiment of the present invention)

Next, with reference to FIGS. 19 and 20, a double-shell structure tank device, a tank displacement measuring device, and tank equipment according to a tenth embodiment of the present invention will be described.

FIG. 19 is a partial sectional side view of a radial displacement measuring device for a double-shell structure tank according to a tenth embodiment of the present invention.

FIG. 20 is an enlarged view of part A in FIG.

The tank displacement measuring device according to the tenth embodiment of the present invention includes two (at least two) radial displacement measuring devices 50a and 2 in the same manner as the ninth embodiment of the present invention. It consists of one (at least one) rotation direction displacement measuring device 51, one inner tank height direction displacement measuring device 52, and tank monitoring device 70 (70a).

[0133] The difference from the ninth embodiment of the present invention is that, as will be described later, the pipe for each measuring device is connected between the inner tank side wall 3 and the outer tank 5 as the aforementioned connecting pipe ( The outer tank 5 is provided near the outer tank 5 on the outer surface side of the inner tank side wall 3.

That is, four radial displacement measuring devices 50a composed of radial displacement measuring pipes 55a, 55b, 55c, 55d, laser-type distance measuring instruments 38a, 38b, 38c, 38d, etc. In the vicinity of the outer tank 5 between the metal plate 48 on the inner surface of the tank 5 and the inner tank side wall 3, they are attached at equal angles on the same horizontal plane.

[0135] Each radial displacement measuring device 50a includes a displacement measuring instrument storage box 34, a laser distance measuring instrument 3 8a, 38b, 38c, 38d, radial displacement measurement type 55a, 55b, 55c, 55d, pipe side flange 41, mounting bolt nut 44, displacement measuring instrument storage box side flange 45 , A shutoff valve 35, a mirror body enclosure 59, a mirror body 60 for displacement measurement, an outlet pipe 62, an inner tank wall side thick pipe 67, a seal rubber 68, and the like.

[0136] Each of the radial displacement measuring pipes 55a, 55b, 55c, 55d extends vertically through the outer tank upper lid 8 and the airtight metal plate 48, and the metal plate 48 on the inner surface of the outer tank 5 And the inner tank side wall 3 so as to pass between the outer tank side wall 7 and the inner tank side wall 3.

For the radial displacement measurement 55a, 55b, 55c, 55d, seals (not shown) are installed so that natural gas that should keep airtightness does not leak to the outside where the outer tank top lid 8 and the airtight metal plate 48 penetrate. Materials are provided!

[0137] The tank central side surface of the mirror body storage enclosure 59 has an outlet pipe 62 fixed to the side surface of the mirror body storage enclosure 59, an inner tank side wall 3 having a diameter larger than the inner tank side wall 3 and fixed to the outer surface. It is connected to the outer surface of the inner tank side wall 3 by a wall-side thick pipe 67 so that it can cope with the deformation of the inner tank 1 in the radial direction and the rotation direction.

A cylindrical seal rubber 68 is interposed between the outlet pipe 62 and the inner tank wall side thick pipe 67.

[0138] (Configuration of first example of tank monitoring device)

Next, the configuration of the first example of the tank monitoring device will be described with reference to FIG.

FIG. 21 is a block diagram of a first example of the tank monitoring device in each embodiment of the present invention. The tank monitoring device of the first example includes the first embodiment (see FIGS. 1 to 7), the second embodiment (see FIG. 8), and the sixth embodiment (see FIG. 12). The seventh embodiment (see FIG. 13), the eighth embodiment, the ninth embodiment (see FIGS. 14 to 18) and the tenth embodiment (see FIGS. 19 and 20) Applicable to

[0139] In addition, radial displacement measuring devices 26, 26a, 26e, 26f, 50, 50a installed at four equal intervals (90 ° ± several%), two equal intervals (180 ° ± several) %) Rotational direction displacement meter Measuring device 27, 26e, 51, one inner tank height direction displacement measuring device 28, 52, and one pipe shrinkage correction amount measuring device 29 (or! / Or thermometer) are required. .

As shown in FIG. 21, the tank monitoring device 70a includes an expansion / contraction amount calculator 82, a center position calculator.

83, rotation direction calculator 84, abnormal value detector 85, alarm indicator 86 and indicator / recorder 8

It is composed of 7 etc.

[0141] First, the four radial displacement measuring devices 26a, 26b, 26c shown in FIG. 1, FIG. 2, FIG. 3, and FIG.

The distance from each laser type distance measuring device 38a, 38b, 38c, 38d to the inner tank side wall 3 via the first specular body 37 at each laser type distance measuring device 38a, 38b, 38c, 38d of 26d The measured values La, Lb, Lc, and Ld of the radial displacement are measured.

The measured values La, Lb, Lc, and Ld of the four measured radial displacements are displayed on the machine-side display 81, as well as the center position calculator 83, the abnormal value detector 85, and the display of the tank monitoring device 70a. Device / recorder 87.

For the sake of explanation, the measured values La and Lc of the radial displacement are assumed to be the y direction, and the measured values Lb and Ld of the radial displacement are assumed to be the x direction.

[0142] In the center position calculator 83, the X direction displacement and the y direction displacement of the center O of the inner tank 1 are calculated by the following equations.

X-direction displacement Δ χ = (Ld— Lb) / 2,

y-direction displacement Ay = (La— Lc) / 2 (Equation 1)

The calculated radial displacement (Δχ, Ay) is transmitted to the rotation direction calculator 84, the abnormal value detector 85, and the display / recorder 87.

In the abnormal value detector 85, when the displacement of the center O (Δχ, Ay) becomes an allowable value abnormality, it is determined as abnormal and the alarm indicator lamp 86 is turned on.

The measured values La, Lb, Lc, and Ld of each radial displacement are from the laser distance measuring instruments 38a, 38b, 38c, 38d to the inner tank side wall 3 via the first mirror body 37 as described above. In the calculation of the difference in Equation 1 above (Ld-Lb) and (La-Lc), the distance from each laser set distance measuring device 38a, 38b, 38c, 38d to each first mirror body 37 The distance to each other is canceled out, and only the difference in distance from each first mirror body 37 to each inner tank side wall 3 is obtained.

[0143] In addition, each laser of the two rotational direction displacement measuring devices 27 shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 5 The set distance measuring instruments 38e and 38f measure the rotational displacements Le and Lf, which are the distances from the laser distance measuring instruments 38e and 38f to the vertical members 21 via the first mirror 37. It is measured.

The measured values Le and Lf of the two measured rotational displacements are displayed on the machine-side display 81 and transmitted to the pipe length corrector 71 of the tank monitoring device 70a.

Further, the pipe length measurement value Lh is measured by the laser distance measuring device 38h of the pipe contraction correction amount measuring device 29 shown in FIGS. 1, 2, and 7.

The measurement value Lh of the measured pipe length is displayed on the machine-side display 81 and is transmitted to the pipe length corrector 71 and the display / recorder 87 of the tank monitoring device 70a.

[0145] Alternatively, the temperature measured by the multi-pair thermometer 80 installed for each lm on the inner surface of the pipe contraction correction pipe 33 is displayed on the machine-side display 81 and tank monitoring It is transmitted to the expansion / contraction amount calculator 82 and the display / recorder 87 of the device 70a.

The expansion / contraction amount calculator 82 calculates the pipe length measurement value Lh of the rotational direction displacement measurement pipes 31a and 31b based on the measured temperature, and transmits it to the pipe length corrector 71 and the display / recorder 87. .

[0146] Based on the measured values Le and Lf of the rotational displacement and the measured value Lh of the pipe length, the Neupe length corrector 71 calculates two rotational displacements A Le and A Lf according to the following equation.

Rotational displacement Δ Le = (Le Lh),

Rotational displacement A Lf = (Lf— Lh) (Equation 2)

The calculated rotational displacements A Le and A Lf are transmitted to the rotation direction calculator 84, the abnormal value detector 85, and the display / recorder 87.

[0147] In the rotational direction computing unit 84, assuming that the radius of the inner tank side wall 3 is Dt, the rotational direction displacement amount Δφ (rotational angle) is calculated by the following equation based on the rotational displacement A Le and the rotational displacement A Lf The Rotational displacement Δ φ = tan ^{_ 1} ((A Le + A Lf) / Dt) (Equation 3)

The calculated rotational displacement Δφ is transmitted to the abnormal value detector 85 and the display / recorder 87.

In the abnormal value detector 85, when the rotation direction displacement amount Δφ becomes an allowable value abnormality, it is determined as abnormal and the alarm indicator lamp 86 is turned on. [0148] Formulas 1 and 2 are summarized as follows, and the force S for measuring and calculating the rotational displacement can be obtained regardless of the radial displacement (Δχ, Δγ).

Rotational displacement Δ φ = tan ^→ ((Le + Lf-2Lh) / 2Dt) (Equation 4)

[0149] (Configuration of second example of tank monitoring device)

Next, the displacement state of the inner tank 1 and the configuration of the second example of the tank monitoring device 70 will be described with reference to FIGS.

FIG. 22 is an explanatory diagram showing the measurement principle of the second example of the tank monitoring device in each embodiment of the present invention.

FIG. 23 is a block diagram of a tank monitoring apparatus of a second example of the tank monitoring apparatus in each embodiment of the present invention.

The second example of the tank monitoring device 70 can be applied to the first to tenth embodiments.

[0150] The double-shell structure tank according to the first to tenth embodiments of the present invention described above (see Figs. 1 to 20). 38, 38a, 38b, 38c, 38d, 38e, 38f, 38g, 38h Measuring force S, if it is about once or twice a year, record each measured value in a notebook etc. and calculate each displacement manually It is also possible to do this.

However, as shown below, it is also possible to install each calculation program in the tank monitoring device and automatically calculate the displacement.

The tank monitoring device for automatic calculation will be described below.

[0151] As shown in FIG. 23, the tank monitoring device 70 includes a pipe length corrector 71, an inner tank side wall position calculator 72, a center position calculator 73, a radial displacement calculator 74, and a vertical member position calculator. 75, a center position corrector 76, a rotation direction displacement calculator 77, a storage device 78a, a recording device 78b, and a display device 79.

The storage device 78a, the recording device 78b, and the display device 79 can be shared with the discharge pump control device 90, the tank temperature, and various circuits for monitoring the LNG level.

First, the data (or memory area) stored in the storage device 78a will be described in detail.

At least the following common data is input to the storage device 78a in advance by input means (not shown) for measuring the displacement of the double-shell structure tank, and stored in a predetermined memory area of the storage device 78a. It is.

1) Inner tank side wall 3 inside diameter Dt

2) Position of existing center point O of inner tank side wall 3 (coordinates)

3) Each laser type distance measuring instrument 38, 38a, 38b, 38c, 38d, 38e, 38f, 38g, 38h Laser light 39a, 39b, 39c, 39d, 39e, 39f, 39g, 39h (Coordinate)

4) Irradiation direction (irradiation angle) of each laser beam 39a, 39b, 39c, 39d, 39e, 39f, and 39g reflected by the mirror body 37.

The common data described above may be set in advance as a constant in a program or the like.

The origin of the coordinates may be the existing center point 0 of the inner tank side wall 3 or the center point of the outer tank 5. The above ;;) to 6) data are before the cool-down (when the construction of the double-shell structure tank is completed).

Furthermore, the recorder 78b is provided with a memory area for storing a plurality of sets of the following measurement data.

5) Date of measurement

6) Measured values of radial displacement measured by laser type distance measuring instruments 38a, 38b, 38c, 38d, 38e, 38f, 38g, 38h La, Lb, Lc, Ld, measured values of rotational direction displacement Le, Lf, Measured value of the displacement in the height direction of the existing tank Lg, Measured value of the existing pipe length Lh (or Measured value of the new radial direction displacement Lma, Lmb, Lmc, Lmd, Measured value of the new rotational direction displacement Lme , Lmf, measured value of the displacement in the height direction of the new inner tank Lmg, measured value of the new pipe length Lmh)

7) Calculated radial distance from each mirror body 37 to inner tank side wall 3 A La, A Lb, A Lc, A Ld, inner tank up to horizontal member 20 for measuring displacement in height direction of inner tank Displacement in the height direction A Lg, and distance in the rotation direction to the vertical member 21 for tank rotation measurement Δ Lme, Δ Lmf

8) Calculated existing measurement position (coordinates) Pa, Pb, Pc, Pd, Pe, Pf (or new measurement position (coordinates) Pam, Pbm, Pcm, Pdm, Pem, Pfm)

9) Calculated position of new center point Om (coordinates)

10) Calculated rotational displacement Δφ

11) Conditions such as temperature inside the inner tank side wall 3 during measurement [0154] First, the measured value Lh of the existing pipe length or the measured value Lmh of the new pipe length is measured by the laser-type distance measuring device 38h of the pipe contraction correction amount measuring device 29 shown in FIGS. 1, 2, and 7. It is.

The measured value Lh of the existing pipe length or the measured value Lmh of the new pipe length is transmitted to the pipe length corrector 71 shown in FIG.

[0155] Alternatively, the pipe temperature is input to the pipe length calculator 88, and the measured value Lh of the existing pipe length or the measured value Lmh of the new pipe length is calculated by the noise length calculator 88, and the pipe length corrector 7 1 Sent to.

[0156] On the other hand, the radial displacement measuring devices 26, 26a, 26b, 26c, and 26d shown in FIGS. 1, 2, 3, and 4 are each a laser type ij device 38a, 38b, 38c , 38di trowel, Fig. 22ί Measured values of radial displacement at the measured positions Pa, Pb, Pc, Pd La, Lb, Lc, Ld or new diameters at the new measured positions Pma, Pmb, Pmc, Pmd Measured values of directional displacement Lma, Lmb, L mc, and Lmd are measured.

The measured values La, Lb, Lc, Ld of the measured radial displacement or the measured values Lma, Lmb, Lmc, Lmd of the new radial displacement are transmitted to the pipe length corrector 71 shown in FIG.

[0157] In the Neuve length compensator 71, the measured value La, Lb, Lc, Ld of each existing radial displacement or the measured value Lma, Lmb, Lmc, Lmd of the existing radial displacement Lh or By subtracting the measured value Lmh of the new pipe length, the existing radial distance A La, A Lb, A Lc, A Ld or the new radial distance A Lma from each first mirror body 37 to the inner tank side wall 3 , A Lmb, Δ Lmc, Δ Lmd are calculated.

Calculated existing radial distance A La, A Lb, A Lc, A Ld or new radial displacement New radial direction £ Large separation A Lma, A Lmb, A Lmc, A Lmd Sent to 72. Also, the measured values of the existing radial displacement La, Lb, Lc, Ld or the measured values of the new radial displacement Lma, Lmb, Lmc, Lmd, the calculated radial distance A La, A Lb , A Lc, A Ld or new radial direction distances A Lma, A Lmb, A Lmc, ΔLmd are transmitted to and recorded in the recorder 78b via the direct or inner tank side wall position calculator 72 or the like.

[0158] The inner tank side wall position calculator 72 includes the storage device 78a, the center positions (coordinates) of the laser beams 39a, 39b, 39c, and 39d of the laser distance measuring devices 38a, 38b, 38c, and 38d, First mirror Data of the irradiation direction (irradiation angle) of each laser beam 39a, 39b, 39c, and 39d reflected by the face 37 is input.

Then, in the inner tank side wall position calculator 72, the measured positions Pa, Pb, and the like in the inner tank side wall 3 irradiated with the respective laser beams 39a, 39b, 39c, and 39d by a geometric calculation method based on these various data. Pc, Pd (coordinates) or new measurement positions Pma, Pmb, Pmc, Pmd (coordinates

) Is calculated.

The calculated measurement positions Pa, Pb, Pc, Pd (coordinates) or new measurement positions Pma, Pmb, Pmc, Pmd (coordinates) are transmitted to the center position calculator 73.

The calculated measurement positions Pa, Pb, Pc, Pd (coordinates) or the new measurement positions Pma, Pmb, Pmc, Pmd (coordinates) are recorded directly or via the center position calculator 73 described later. It is also sent and recorded in device 78b.

[0159] The center position calculator 73 uses a geometric calculation method based on the received measured positions Pa, Pb, Pc, Pd (coordinates) or the new measured positions Pma, Pmb, Pmc, Pmd (coordinates). The existing center position O (coordinates) or new center position Om (coordinates) of the tank side wall 3 is calculated.

The calculated center position O or! / Of the inner tank side wall 3 and the new center position Om are transmitted to the radial displacement calculator 74.

The calculated center position O or new center position Om of the inner tank side wall 3 is also transmitted to and recorded in the recorder 78b via the direct or radial displacement calculator 74.

[0160] If the measurement and calculation processing is the first time (before the cool-down), the existing center position 0 (coordinates) is calculated, transmitted to the recorder 78b, and terminated when stored together with the measurement date.

In the case of the second and subsequent measurement and calculation processing, the measured values and measured positions are the previous or first ones. Which measurement date is used as the measured values and measured positions? This is input by the tank monitoring device 70.

[0161] The radial displacement calculator 74 compares the existing center position 0 (coordinates) transmitted from the storage device 78a with the new center position Om (coordinates) transmitted from the center position calculator 73 to obtain the center. The amount of position change Δ Om (direction and displacement) is calculated.

The calculated center position change amount Δθπι is transmitted to the recorder 78b and recorded.

Further, the calculated center position change amount A Om is also transmitted to the center position corrector 76 described later. Is done.

[0162] Further, the pipe length compensator 71 includes the laser type distance measuring devices 38e and 38f of the rotational direction displacement measuring devices 27 shown in FIGS. 1, 2, 3, and 5, respectively. The measured values Le and Lf of the existing rotational direction displacement at the existing measured positions Pe and Pf shown in Fig. 5 or the measured values Lme and Lmf of the new rotational direction displacement at the new measured positions Pme and Pmf are measured.

The measured values Le and Lf of the measured rotational direction displacement or the measured values Lme and Lmf of the new rotational direction displacement are transmitted to the pipe length corrector 71 shown in FIG.

[0163] In the Neuve length corrector 71, the measured value Le, Lf of each existing rotational direction displacement or the measured value Lme, Lmf of the new rotational direction displacement is used to calculate the measured value Lh of the existing pipe length or the measured value L mh of the new pipe length. By subtracting, the already-rotated direction distances A Le, A Lf or new rotation direction distances A Lme, A Lm f, which are the distances from each second mirror body 37 to the vertical member 21 for tank rotation measurement, are calculated. The

The calculated rotation direction distances A Le and A Lf or the new rotation direction distances A Lme and A Lmf are transmitted to the vertical member position calculator 75.

Also, the measured values Le, Lf or the measured values of the new rotational direction displacement Lme, Lmf, the calculated rotational direction distances ΔLe, ΔLf, or the new rotational direction distances ΔLme, A Lmf are Then, the data is transmitted and recorded in the storage device 78b via the direct or vertical member position calculator 75 or the like.

[0164] The vertical member position calculator 75 includes, from the storage device 78a, the center positions (coordinates) of the laser beams 39e and 39f of the laser distance measuring devices 38e and 38f shown in FIG. Data on the irradiation direction (irradiation angle) of each reflected laser beam 39e, 39f is input.

Then, the vertical member position calculator 75 uses the geometric calculation method based on these data to perform the apparent rotation shown in FIG. 22 in the vertical member 21 for measuring the tank rotation irradiated with the laser beams 39e and 39f. The measurement positions Pe and Pf (coordinates) or the apparent new measurement positions Pme and Pmf (coordinates) are calculated.

The calculated apparent measured positions Pe, Pf (coordinates) or! /, And the apparent new measured positions Pme, Pmf (coordinates) are transmitted to the center position corrector 76.

Also, the calculated apparent measured position Pe, Pf (coordinates) or the apparent new measured position P The me and Pmf (coordinates) are also transmitted and recorded to the recorder 78b via the direct or center position corrector 76 and the like.

If the measurement and calculation process is the first time (before the cool-down), the process ends when it is stored together with the date of measurement.

[0166] In the center position compensator 76, the apparent measured positions Pe and Pf (coordinates) or the apparent new measured positions Pme and Pmf (coordinates) transmitted from the vertical member position calculator 75 are calculated by radial displacement. Based on the center position change amount A Om transmitted from the device 74, the true existing measurement positions Pe and Pf (coordinates) or the true new measurement positions Pme and Pmf (coordinates) are calculated.

The calculated true measured positions Pe and Pf (coordinates) or the true new measured positions Pme and Pmf (coordinates) are transmitted to the rotational direction displacement calculator 77.

Also, the calculated true measured position Pe, Pf (coordinate) or the true new measured position Pme, Pmf (coordinate) is also sent directly to the recorder 78b via the rotational displacement calculator 77 or the like. And recorded.

[0167] In the rotational direction displacement calculator 77, the rotational direction displacement amount Δφ based on the true existing measured positions Pe and Pf (coordinates) or the true new measured positions Pme and Pmf (coordinates) from the center position corrector 76. Calculate (rotation angle).

The calculated rotational displacement Δφ (rotation angle) is transmitted to the recorder 78b and recorded.

Yes

[0168] Then, on the display device 79, the radial displacement, the rotational displacement, and the like of the inner tank side wall 3 are displayed digitally or graphically based on the above-mentioned various measured values and calculated values.

The diameter of the inner tank side wall 3 is 80 m (80000 mm), whereas the radial displacement and the rotational displacement are several hundred mm.

Therefore, if the graphic display is made with this value, it is difficult to confirm the change by the graphic display.

Therefore, when the amount is displayed graphically, it is possible to visually confirm that the amount has changed by displaying the amount of displacement in the radial direction and the amount of displacement in the rotational direction by, for example, enlarging the amount by 10 times.

[0169] (Other variations) The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications may be made to the specific structure within the scope of the present invention. Nor.

For example, it can be applied to a pressure-resistant double shell tank for storing pressure fluid other than for storing cryogenic liquefied natural gas (LNG).

It can also be used in semi-underground double shell tanks.

The liquefied natural gas storage facility may be provided with a plurality of storage tanks, a force S in which a re-liquefaction device for vaporized natural gas is installed, and tank monitoring devices 70 in a distributed manner for each tank. It can also be used in underground double shell tanks.

Also, when measuring the displacement of the inner tank 1 before the cooldown, after the cooldown, after the earthquake, etc. And shut off the shutoff valve 35 of each measurement pipe 33, attach a flat plate to the flange at the upper end of each measurement pipe 33, and measure the laser distance at the upper end of the measurement pipe 33 only during measurement. You may make it measure by connecting the measuring instrument 38. FIG.

Claims

The scope of the claims

[1] In a double shell tank with an outer tank and an inner tank,

A shut-off valve provided outside the outer tub of the radial displacement measuring pipe, and a laser transceiver attaching / detaching seat provided at an upper end of the radial displacement measuring pipe. Heavy shell tank device.

[2] A mirror body that is attached to a lower end of the radial displacement measuring pipe and reflects laser light emitted from a laser-type distance measuring device connected to the laser transmitter / receiver seat in the direction of the inner tank;

The double-shell structure tank apparatus according to claim 1, further comprising:

[3] The inner tank has an inner tank bottom plate and an inner tank side wall, and an inner tank upper lid provided so as to be movable relative to the inner tank side wall.

The double-shell structure tank apparatus according to claim 2, wherein the radial displacement measuring pipe extends in a vertical direction and penetrates the inner tank upper lid.

4. The double-shell structure tank apparatus according to claim 3, wherein the radial displacement measuring pipe and the mirror body are made of the same material.

[5] Two pipes for measuring radial displacement facing the inner tank are provided,

The double-shell structure tank apparatus according to claim 3 or 4, wherein the mirror body is installed so as to open within a range of%.

[6] At least three radial displacement measuring pipes facing the inner tank are provided,

5. The double-shell structure tank device according to claim 3, wherein the mirror body is installed so that an irradiation direction of the laser beam reflected by the mirror body opens at an equal angle in a horizontal plane.

[7] The radial displacement measuring pipe facing the inner tank is one,

The specular body has a polygonal pyramid shape,

The double-shell structure tank device according to claim 3 or 4, wherein the laser beam is applied to a plurality of locations.

[8] The radial displacement measuring pipe facing the inner tank is one,

The specular body has a polygonal pyramid shape,

5. The double-shell structure tank apparatus according to claim 3, wherein an irradiation direction of the laser beam is changeable.

[9] A vertical member attached to the inner tank side wall;

A double-shell structure tank device according to any one of claims 3 to 8, wherein

10. The double-shell structure tank device according to claim 9, wherein the rotational direction displacement measuring pipe and the second mirror body are made of the same material.

[11] a horizontal member attached to the inner tank side wall;

A shutoff valve provided outside the outer tank of the height direction displacement measuring pipe of the inner tank, and a laser transmitter / receiver seating provided at the upper end of the height direction displacement measuring pipe of the inner tank, The double-shell structure tank apparatus according to any one of claims 3 to 10, further comprising:

[12] A pipe contraction correction pipe extending in a vertical direction and penetrating the upper part of the outer tank and the upper cover of the inner tank,

A shutoff valve provided outside the outer tub of the pipe contraction correction pipe; a laser transceiver mounting / dismounting seat provided at an upper end of the pipe contraction correction pipe; A horizontal member at the lower end of the horizontal pipe attached to the lower end of the pipe contraction correction pipe;

The double-shell structure tank apparatus according to any one of claims 3 to 11, further comprising:

[13] The double shell structure according to any one of [3] to [8], wherein a temperature sensor is provided at a predetermined interval on the pipe for measuring the radial displacement or the pipe penetrating the inner tank upper lid. Tank equipment.

14. The double-shell structure tank apparatus according to claim 9 or 10, wherein a temperature sensor is provided at a predetermined interval on the rotational direction displacement measuring pipe.

15. The double-shell structure tank device according to claim 11, wherein temperature sensors are provided at predetermined intervals on the pipe for measuring displacement in the height direction of the inner tank.

16. The double-shell structure tank device according to claim 2, wherein the radial displacement measuring pipe extends in a vertical direction and extends between the inner tank and the outer tank. .

[17] At least three radial displacement measuring pipes facing the inner tank are provided,

17. The double-shell structure tank apparatus according to claim 16, wherein the mirror body is installed so that an irradiation direction of the laser beam reflected by the mirror body opens at an equal angle in a horizontal plane.

[18] a vertical member attached to the inner tank side wall;

The double-shell structure tank apparatus according to claim 16 or 17, characterized by comprising:

[19] a horizontal member attached to the inner tank side wall; A pipe for measuring the displacement in the height direction of the inner tub extending in the vertical direction and facing the horizontal member;

A shutoff valve provided outside the outer tank of the height direction displacement measuring pipe of the inner tank, and a laser transmitter / receiver seating provided at the upper end of the height direction displacement measuring pipe of the inner tank, The double-shell structure tank device according to any one of claims 16 to 18, further comprising:

20. The double-shell structure tank device according to any one of claims 1 to 19, wherein a laser type distance measuring device is connected to each of the laser transmitter / receiver seats.

[21] The double shell structure tank device includes a tank monitoring device that calculates and displays radial displacement and rotational displacement.

The tank monitoring device

A rotation direction displacement calculator for calculating a rotation angle of the inner tank side wall based on the true position of the vertical member from the center position corrector; A display for displaying the amount of displacement of the center position from the radial displacement calculator and the rotation angle from the rotational displacement calculator;

The double-shell structure tank device according to any one of claims 9 to 13, 18, and 19, further comprising:

[22] In a double-shell structure tank having an outer tank and an inner tank,

The tank monitoring device A measured force of the radial displacement measured by the laser-type distance measuring instrument connected to the radial displacement measuring pipe; a central position calculator for calculating a central position of the inner tank side wall;

Measured by the laser distance measuring instrument connected to the pipe contraction correction pipe from the measured value of the rotational displacement measured by the laser distance measuring instrument connected to the rotational displacement measuring pipe. A pipe length corrector that subtracts the measured pipe length and calculates the distance in the rotational direction;

A double-shell structure tank device.

In a double-shell structure tank having an outer tank and an inner tank,

A shutoff valve provided outside the outer tub of each rotational direction displacement measuring pipe, a laser transmitter / receiver seating provided at an upper end of each rotational direction displacement measuring pipe, and each rotational direction. Each laser irradiated from each laser type distance measuring device attached to the lower end of the displacement measuring pipe and connected to the laser transmitter / receiver seat. A second mirror that reflects the light in the direction of each vertical member;

A temperature sensor attached to any of the measurement pipes;

The tank monitoring device

A double-shell structure tank device.

The double-shell structure tank device according to any one of claims 21 to 23, wherein a plurality of the double-shell structure tanks are installed,

Each tank monitoring device is provided in a central monitoring center.