JP6192148B1 - Tank underground installation structure - Google Patents

Abstract

The present invention provides a structure that enables a cylindrical tank 1 to be installed relatively easily in the ground. [MEANS FOR SOLVING PROBLEMS] After swinging vertically after placing a lower portion of a cylindrical tank (1) on a concave upper surface of a support base (3) installed on the inner bottom of a storage unit (2) installed in the ground, The rolling of the tank 1 is restricted by the stop member 5. Since the support 3 is mounted with the tank 1, the operation of installing it on the inner bottom of the storage unit 2 can be performed before the tank 1 is carried into the storage unit 2. Further, since the steady member 5 is installed on the upper part of the tank 1, the installation work can be performed after the tank 1 is carried into the storage unit 2. From these things, the installation work of the tank 1 becomes simple compared with the case shown in FIG. [Selection] Figure 1

Description

  The present invention relates to a structure in which a cylindrical tank is installed vertically in the ground.

  Conventionally, when a tank is installed in the ground, for example, as shown in Patent Documents 1 and 2, it has been mainstream to set it horizontally.

  In general, when a tank is installed in the ground, it is known that if the tank is made of a metal such as steel, corrosion or pitting occurs due to secular change or the like, leading to liquid leakage.

  In order to prevent such liquid leakage from the tank, in the case of Patent Document 1, FRP (Fiber Reinforced Composite Material) is adhered to the inside of the steel tank. In this case, FRP (fiber reinforced composite material) is applied to the inside of the steel tank.

  By the way, in the case of a horizontal type underground tank, it can be said that it is not suitable for installation in the ground of a narrow site because its planar occupation area increases. On the other hand, when installing a tank in the ground of a narrow site, it is preferable to place the tank vertically.

  As such a vertical underground tank, there is, for example, Patent Document 3. This Patent Document 3 describes that an upright cylindrical water tank is installed underground using a shaft excavated with a circular casing. In addition, this patent document 3 has no description regarding the liquid leakage and no description regarding the countermeasure against the liquid leakage.

Japanese Patent No. 3594183 Utility Model Registration No. 3200043 JP 2001-329553 A

  In Patent Document 3, there is a concern that the structure for installing the tank is complicated and time-consuming.

  In addition, as an example of installing the tank vertically in the ground, as shown in FIG. 9, a cylindrical support leg 102 is joined to the lower part of the tank 100 having a single shell structure, and this support is provided. It is known that the legs 102 are installed on the inner bottom portion (formed of a concrete structure) of the storage portion 101 formed of a concave space in the ground. The support leg 102 is fixed to an anchor bolt 103 embedded in the inner bottom portion of the storage unit 101. A reinforcing member 104 is attached to the support leg 102 and the inner bottom portion of the tank 100.

  In such a support structure of the tank 100, it is pointed out that the work for installing the tank 100 is complicated and troublesome. That is, the support legs 102 are joined to the lower part of the tank 100 in advance, and the anchor bolt 103 is installed on the inner bottom of the storage unit 101 before the tank 100 is carried into the storage unit 101. Then, while carrying the tank 100 into the storage unit 101, the support legs 102 joined in advance to the lower part of the tank 100 are attached to the anchor bolts 103.

  At that time, the position of the anchor bolt 103 and the position of the bolt insertion hole (not shown) of the support leg 102 of the tank 100 often deviate at the site. In particular, when the tank 100 has a large storage amount, the positional deviation increases as the outer diameter increases, and the adjustment work for correcting the positional deviation may be extremely troublesome. be pointed out. For this reason, the installation work of the tank 100 is complicated and time-consuming, and there is room for improvement here.

  In view of such circumstances, an object of the present invention is to provide a structure that allows a cylindrical tank to be installed in the ground in a relatively simple manner.

  By the way, when the liquid stored in the single-shell tank 100 is a dangerous material such as fuel, it must be equipped with a liquid leakage detection facility by the Dangerous Goods Safety Technology Association established under the Fire Service Law. It is prescribed.

  By the way, as for the liquid leak detection equipment for single-shell tanks, the “Diagram, Quick Reference 2 of Dangerous Goods Facility Standards” supervised by the Tokyo Fire Department and issued by Tokyo Law Publishing Co., Ltd. There are descriptions such as detecting leakage by providing leak detection tubes at four or more locations, or detecting leakage by constantly monitoring changes in the amount of stored liquid in the tank.

  By the way, an SF double shell tank that is excellent in that it can prevent liquid leakage into the ground even if liquid leakage occurs is known in the past. This SF double shell tank means a double shell structure in which the outer periphery of a metal inner shell is covered with an FRP (fiber reinforced plastic) outer shell.

  When such an SF double shell tank is used, it is required to equip the liquid leakage detection equipment for the SF double shell tank described in the book.

  In this liquid leak detection equipment, a liquid leak detection pipe is disposed in the metal inner shell of the SF double shell tank, and the liquid leaking into the gap between the lower part of the metal inner shell and the FRP outer shell is the liquid. When the liquid level in the liquid leak detection pipe exceeds a predetermined value by flowing into the leak detection pipe, an alarm for liquid leak is given.

  For this reason, the present inventors consider that the SF double shell tank is preferable as a tank installed vertically in the ground, but none has been realized at present.

  The reason will be explained. For example, assuming that the vertically installed structure of the tank 100 having a single shell structure shown in FIG. 9 is applied when the SF double shell tank is vertically installed, the SF double shell is not shown. It is necessary to join the support leg to the lower part of the tank.

  In that case, the support leg is joined to the metal inner shell of the SF double shell tank. In this case, the gap between the metal inner shell and the FRP outer shell facing each other in the SF double shell tank. However, the gap formed in the peripheral portion of the tank by the joint portion of the support leg and the gap formed in the lower portion of the tank must be cut off to make them discontinuous.

  Therefore, the above-described liquid leakage detection equipment for the SF double shell tank cannot be employed in the SF double shell tank that has been subjected to the liquid leakage countermeasure. For this reason, the inventors of the present invention installed an SF double shell tank that can prevent liquid leakage into the ground vertically in the ground, and for the SF double shell tank described above. We are also eagerly studying the possibility of adopting the liquid leak detection equipment.

Underground installation structure of the tank according to the present invention includes a tank-shaped lower and a circular cylindrical with rounded, a storage unit the tank interior and is provided in the ground are housed and arranged in vertically, this A support base installed on the inner bottom of the storage unit and on which the tank is mounted, a buffer member interposed between the upper surface of the support base and the lower part of the tank, and the lateral movement of the tank are restricted An anti-sway member erected between a shoulder portion of the tank and an inner wall portion of the storage portion, and the upper surface of the support base is formed in a concave shape so that the lower portion of the tank fits The buffer member is arranged such that a plurality of fan-shaped sheets are circular with a predetermined gap between each other, and the concave upper surface of the support base and the lower part of the tank are formed by the gap. To the deepest position from the periphery of the tank. Clearance is secured, it is characterized in that.

  In this configuration, the anti-sway member is placed vertically on the concave upper surface of the support base installed on the inner bottom of the storage unit installed in the ground so as to fit the lower part of the tank. Thus, the horizontal movement of the upper part of the tank is restricted, so that the tank can be installed in the ground in a stable state.

  And since the said support stand is what the said tank is mounted, the operation | work which installs it on the inner bottom part of the said storage part can be performed before carrying the said tank in the said storage part. Moreover, since the said steadying member is installed in the upper part of the said tank, the installation operation can be performed after carrying the said tank in the said storage part. For these reasons, the installation work of the tank is carried out in such a manner that the cylindrical support leg 102 joined in advance to the lower part of the tank 100 is fixed to the anchor bolt 103 while the tank 100 is carried into the storage portion 101 as shown in FIG. Compared with the case of attaching to the tank, the installation work of the tank in the present invention becomes much simpler.

  By the way, in the underground installation structure of the said tank, it is preferable that both the inner bottom part of the said storage part and the said support stand are made into a concrete structure, and the said support stand is united with the said inner bottom part. In addition, before carrying a tank in a storage part, the said support stand which consists of a concrete structure is constructed so that it may laminate | stack continuously with the construction of the inner bottom part which consists of the said concrete structure, The said support stand becomes It will be integrated into the inner bottom.

  In this case, it is clear that the anchor bolt as shown in FIG. 9 is not used when the support base is installed on the inner bottom portion of the storage portion.

  Moreover, in the underground installation structure of the said tank, it is preferable to fill a space between the said storage part and the said tank with a lot of granular members.

  In this case, when a fire caused by liquid leakage occurs, the large amount of the granular member is useful as a flame retardant.

  Further, the underground installation structure of the tank further includes a liquid leakage detection device for detecting liquid leakage from the tank, and the tank includes a metal inner shell in which the liquid is stored, and an inner shell of the inner shell. A double-shell structure including an outer shell made of a synthetic resin that is coated so as to be non-adhering in an area from at least a shoulder portion to a lower portion of the inner shell on the outside; A liquid leak that is inserted along the vertical direction and protrudes outward from the upper part of the tank and has a lower opening exposed between the deepest position of the inner shell and the outer shell. A detection tube, and a detection unit that is provided in the liquid leakage detection tube and determines whether or not liquid leaks from the inner shell based on the liquid level of the liquid flowing into the liquid leakage detection tube. It is preferable to adopt a configuration.

  In this configuration, it is assumed that a tank having a double shell structure is used. And, if the liquid leaks from the inner shell of the double-shell tank due to secular change or the like, the region where the liquid is not bonded between the inner shell and the outer shell It becomes easy to flow into the lower opening of the liquid leak detection tube disposed at the deepest position of the inner shell.

Further, when the gap is ensured by arranging a plurality of fan-shaped sheets as cushioning members in a circular shape with a predetermined gap therebetween as in the above configuration, the deepest position of the tank The contact pressure of the outer shell with respect to the inner shell becomes weaker than other parts. As a result, if the tank has a double-shell structure, liquid may leak between the inner shell and the outer shell from the inner shell of the double-shell tank due to aging. when the, reaches the lower opening of the liquid leakage detection tube in which the liquid is placed in the deepest position of the inner shell through the area being a non-adhesive in between the outer shell and the inner shell It becomes easy to do.

  For this reason, the detection operation by the liquid leakage detection device for a tank having a double shell structure is surely ensured. As a result, it is possible to install the double-shell structure tank, which has taken measures for preventing liquid leakage into the ground, in the ground of a narrow site.

  The tank underground installation structure according to the present invention makes it possible to install a cylindrical tank in the ground in a relatively simple manner.

It is a fragmentary sectional view showing one embodiment of the underground installation structure of the tank concerning the present invention. It is a top view which shows the upper part of a tank in FIG. It is a top view which shows a support stand in FIG. It is the figure which expanded the area | region shown by the arrow (4) of FIG. It is the figure which expanded the area | region shown by the arrow (5) of FIG. It is an enlarged view of the area | region shown by the arrow (6) of FIG. It is other embodiment of the support stand of FIG. 1, and is a top view of a support stand. It is the perspective view which looked up at the support stand of FIG. 7 from the bottom. It is a fragmentary sectional view which shows the underground installation structure of the tank which concerns on a prior art example.

  BEST MODE FOR CARRYING OUT THE INVENTION Best modes for carrying out the present invention will be described in detail below with reference to the accompanying drawings.

  1 to 6 show an embodiment of the present invention. In the figure, 1 is a tank, 2 is a storage section, 3 is a support base, 4 is a buffer member, 5 is a steadying member, 6 is a large amount of granular member, and 7 is a liquid leak detection device.

  The tank 1 has a double shell structure including an inner shell 1a for storing various fuels, liquids such as water, and an outer shell 1b covered on the outer side of the inner shell 1a.

  The tank 1 is formed in a cylindrical shape whose axial dimension is larger than the radial dimension, and its upper and lower parts are formed in a rounded shape.

  In the upper part of the tank 1, there are a supply port 1c for introducing liquid, an extraction port 1d for taking out the liquid inside, an air port 1e, and a sensor for detecting the amount of liquid stored in the tank 1 A storage amount detection port 1f, an inspection port 1g, and the like are provided for passing the wiring (shown) in and out of the tank 1.

  The inner shell 1a is made of a metal such as steel. The outer shell 1b is formed of a synthetic resin such as FRP (fiber reinforced plastic). As is clear from this description, the tank 1 exemplified in this embodiment is an SF double shell tank.

  As shown in FIG. 4 and FIG. 5, the outer shell 1b is bonded to the region from the upper part to the shoulder of the inner shell 1a, but to the region from the shoulder to the lower part of the inner shell 1a. It is non-adhesive. In FIG. 5, the non-adhesion region is exaggerated.

  Further, as shown in FIG. 5, the maximum liquid level of the liquid stored in the tank 1 is the shoulder of the inner shell 1a (the region having the smallest radius of curvature in the upper portion of the inner shell 1a, or the following steadying member 5). It is set at an arbitrary position in a region from the lower end position of the fixed portion of the second bracket 52 to the upper end position of the cylindrical peripheral portion of the tank 1.

  The storage unit 2 is a concave space dug in the ground, and the cross section along the vertical direction and the cross section along the horizontal direction are both formed in a rectangular shape.

  The inner bottom portion and the inner wall portion of the storage portion 2 made of the concave space are made of a solid material such as a concrete structure, and the upper opening of the storage portion 2 made of the concave space is also closed by the solid material such as a concrete structure. Has been.

  A solid material such as a concrete structure in the upper opening of the storage unit 2 serves as a ceiling part of the storage unit 2. This ceiling portion is provided with three holes (reference numerals omitted), and cylindrical tubes 2a, 2b, and 2c are fitted and installed in these three holes, respectively.

  The first tube 2a is disposed so as to surround the supply port 1c and the air port 1e of the tank 1, and the second tube 2b surrounds the take-out port 1d, the storage amount detection port 1f, and the liquid leakage detection tube 7a. It arrange | positions and the 3rd pipe | tube 2a is arrange | positioned so that the inspection port 1g may be enclosed. The first and second pipes 2a and 2b are provided to secure an appropriate work space, and the third pipe 2c is used to secure a passage space when an operator enters and exits the inspection port 1g. Is provided. Lids 2d, 2e, and 2f are attached to the upper openings of the first to third tubes 2a to 2c, respectively, so that they can be opened and closed.

  A tank 1 is stored and arranged vertically in the storage unit 2, and a large amount of granular members 6 (for example, dry sand) are placed in the space between the storage unit 2 and the tank 1. ) Is filled. The vertical installation is a posture in which the central axis of the cylindrical tank 1 is along the vertical direction.

  The support base 3 supports the tank 1 housed and disposed in the storage section 2 and is installed on the inner bottom of the storage section 2.

  The support 3 is formed in a circular shape in plan view with a solid material such as a concrete structure, and the upper surface thereof is formed in a concave shape such as a bowl shape or a mortar shape.

The diameter dimension of the support base 3 is set larger than the outer diameter dimension of the tank 1. The curvature of the concave upper surface of the support base 3 is set to be substantially the same as the curvature of the lower part of the tank 1, and the lower part of the tank 1 is fitted to the concave upper surface of the support base 3 in a just-fit state. ing. Here, “substantially the same” means not only the same case but also an error such as a manufacturing tolerance .

  And the support stand 3 which consists of solid materials, such as this concrete structure, is constructed | assembled so that it may laminate | stack continuously with the construction of the inner bottom part which consists of solid materials, such as the said concrete structure of the storage part 2, The support base 3 is integrated with the inner bottom portion of the storage unit 2.

  The buffer member 4 is interposed between the upper surface of the support base 3 and the lower portion of the tank 1, receives the load of the tank 1, and attenuates the vibration when vibration is generated due to, for example, an earthquake, Absorb and make it difficult to transmit to tank 1.

  As shown in FIG. 3, four buffer members 4 are used, each of which is formed in a fan shape. The fan-shaped buffer member 4 has a shape obtained by dividing, for example, a rubber sheet or the like formed into a circle into four parts.

  The lower portion of the tank 1 is in pressure contact with the buffer member 4, but the support base 3 is arranged on the upper surface of the support base 3 by arranging four fan-shaped buffer members 4 in a circular shape with a predetermined gap therebetween. A gap (8a, 8b) from the peripheral part of the tank 1 to the deepest position is secured between the concave upper surface of the tank and the lower part of the tank 1.

  As shown in FIG. 3, the gaps (8a, 8b) are formed in a cross shape when viewed from above, and two intersecting linear gaps 8a and a region where the two linear gaps 8a intersect. And a circular gap 8b. The diameter of the circular gap 8b is set to be larger than the outer diameter of the lower opening of the liquid leak detection tube 7a described below.

  The reason why the gaps 8a and 8b are provided is that the lower opening of the following liquid leak detection tube 7a is disposed at the deepest position of the tank 1 in the region where the inner shell 1a and the outer shell 1b of the tank 1 are not bonded. Considering this, leaking liquid reaches the lower opening of the liquid leak detection tube 7a by weakening the contact pressure in a part of the outer shell 1b (the gaps 8a and 8b) with respect to the inner shell 1a at the deepest position of the tank 1 This is to make it easier.

  Furthermore, if the buffer member 4 is a single round rubber sheet, there is a risk that wrinkles may occur when the tank 1 is placed. However, as described above, a plurality of (four) fan-shaped When the buffer member 4 is used, it is advantageous in that generation of wrinkles as described above can be suppressed or prevented.

  The steady rest member 5 regulates the lateral movement (rolling) of the tank 1, and as shown in FIGS. 1 and 2, for example, is stored in four places in the circumferential direction of the shoulder portion of the tank 1. It is constructed between the four inner wall portions of the portion 2.

  The steady member 5 includes a first bracket 51, a second bracket 52, a connecting plate 53, a fastening member (bolts 54 and nuts 55), and the like.

  The first bracket 51 is fixed to the inner wall portion of the storage portion 2, the second bracket 52 is fixed to the shoulder portion of the inner shell 1 a of the tank 1, and the connecting plate 53 is the first bracket 51. And the second bracket 52 are connected. The first bracket 51, the second bracket 52, and the connecting plate 53 are formed of an appropriate metal material.

  Then, as shown in FIG. 6, the second bracket 52 is opposed to the first bracket 51 in a straight line with a predetermined interval, and a connecting plate 53 is applied so as to straddle both of them. The bolt 54 is inserted into the bolt insertion hole 51a provided in the first bracket and the bolt insertion hole 53a provided in the first bracket 53a and the second bracket provided in the connection plate 53 and the bolt insertion hole 52a provided in the second bracket 52. Bolts 54 are inserted into the bolt insertion holes 53b, and nuts 55 are screwed into the bolts 54, respectively. Thereby, the 1st bracket 51 and the 2nd bracket 52 are connected.

  The liquid leak detection device 7 detects a liquid leak from the inner shell 1a of the tank 1, and includes a liquid leak detection tube 7a, a detection unit 7b, and the like.

  The liquid leak detection pipe 7a is inserted into the tank 1 along the vertical direction, the upper side protrudes outward from the upper part of the tank 1, and the lower opening is between the deepest position of the inner shell 1a and the outer shell 1b. It arrange | positions so that it may expose to (the said circular gap | interval 8b). As shown in FIG. 4, a lid 7c having a large number of through holes is provided in the lower opening of the liquid leak detection tube 7a.

  The detection unit 7b determines whether or not the liquid is leaking from the inner shell 1a based on the liquid level of the liquid flowing into the liquid leak detection tube 7a, and the liquid level is specified in advance. When the threshold value is less than the threshold value, it is determined that there is no liquid leak that requires repair or replacement of the tank 1, while when the threshold value is exceeded, the liquid leak that requires repair or replacement of the tank 1 occurs. It judges that it is, and issues an alarm. The threshold value is arbitrarily set.

  Next, the installation procedure of the tank 1 will be described.

  First, before the tank 1 is carried into the storage unit 2, the support base 3 is formed on the inner bottom portion of the storage unit 2. At this time, the support 3 made of the solid material such as the same concrete structure is laminated on the inner bottom portion made of the solid material such as the concrete structure of the storage unit 2.

  Thereafter, the buffer member 4 is laid on the support base 3 and then the tank 1 is placed thereon. Then, the tank 1 is supported on the inner wall portion of the storage unit 2 by the steady member 5.

  At this time, the second bracket 52 of the steadying member 5 is fixed to the shoulder portion of the inner shell 1a of the tank 1 in advance. On the other hand, the first bracket 51 of the steadying member 5 is screwed and attached to an anchor bolt that is embedded in the inner wall portion of the storage portion 2 in advance, although not shown, in accordance with the position of the second bracket 52. To fix. As a result, as shown in FIG. 6, the second bracket 52 can be aligned with the first bracket 51 in a straight line. The bracket 52 can be easily connected to the connecting plate 53 and connecting members such as bolts 54 and nuts 55.

  One of the bolt insertion hole 51a of the first bracket 51 and the bolt insertion hole 52a of the second bracket 52, and the first bracket bolt insertion hole 53a and the second bracket bolt insertion hole 53b of the connecting plate 53 are provided. If the long hole is longer than the diameter dimension of the screw shaft of the bolt 54, the bolt insertion hole 51a of the first bracket 51 and the first bracket bolt insertion hole 53a of the connecting plate 53 may be misaligned, 2 Even if the bolt insertion hole 52a of the bracket 52 and the bolt insertion hole 53b for the second bracket of the connection plate 53 are misaligned, the bolt 54 is simply adjusted by moving the connection plate 53 or the like. Can be inserted easily.

  As described above, the underground installation structure of the tank 1 of this embodiment is such that the cylindrical tank 1 is vertically long on the concave upper surface of the support base 3 installed on the inner bottom of the storage unit 2 installed in the ground. After placing in a posture and fitting the lower part thereof, the steady movement member 5 regulates the lateral movement of the upper part of the tank 1.

  Thereby, it becomes possible to install the tank 1 in the ground in a stable state.

  Moreover, the support base 3 is laminated as a solid material such as a concrete structure on the inner bottom portion made of a solid material such as the concrete structure of the storage unit 2 before the tank 1 is carried into the storage unit 2. It is only fixedly installed by. Further, since the steadying member 5 is installed on the upper portion of the tank 1, the work for installing the steadying member 5 can be performed after the tank 1 is carried into the storage unit 2.

  From these, as compared with the case where the cylindrical support leg 102 joined in advance to the lower part of the tank 100 is attached to the anchor bolt 103 while carrying the tank 100 into the storage unit 101 as shown in FIG. And the installation work of the tank 1 in this embodiment becomes much simpler.

  Therefore, it is possible to install the tank 1 in the storage unit 2 in a stable state in a vertical position with a relatively simple configuration and a relatively simple operation.

  In particular, in this embodiment, an SF double shell tank excellent in prevention of liquid leakage into the ground is adopted as the tank 1, and a liquid leak is detected for detecting a liquid leak from the inner shell 1a of the SF double shell tank. The detection operation by the detection device 7 is surely ensured.

  That is, if the liquid leaks from the inner shell 1a of the tank 1 due to secular change or the like, the liquid does not adhere to the inner shell 1a and the outer shell 1b (periphery or lower portion of the tank 1). It flows into the lower opening of the liquid leak detection pipe 7a disposed at the deepest position of the inner shell 1a.

  In addition, although the outer shell 1b is pressed with respect to the peripheral part of the inner shell 1a in the non-adhesion area | region of the peripheral part of the inner shell 1a and the outer shell 1b with the filling of the large amount of granular members 6 with respect to the storage part 2, As described above, if the liquid leaks from the peripheral portion of the inner shell 1a, the liquid flows through the non-adhesion region pressed by the capillary phenomenon and reaches the liquid leak detection tube 7a. To come.

  Further, the non-bonding region between the lower part of the inner shell 1a and the outer shell 1b is that the outer shell 1b is pressed against the lower part of the inner shell 1a due to the presence of the four buffer members 4, but as described above, When the liquid leaks from the lower part of 1a, the liquid flows through the non-adhesion region to be pressed by the capillary phenomenon, and reaches the liquid leak detection tube 7a.

  For this reason, it is possible to stably install the vertically placed tank 1 in the ground while reliably ensuring the detection operation by the liquid leakage detection device 7 for the SF double shell tank. As a result, the tank 1 composed of the SF double shell tank can be installed in the ground of a narrow site.

  By the way, although the leak detection of the inner shell 1a is performed at all times, the leak inspection of the inner shell 1a and the outer shell 1b can be performed periodically (for example, once every three years) by other methods. . This leak inspection is, for example, a form in which a predetermined pressure is applied between the inner shell 1a and the outer shell 1b from the liquid leak detection tube 7a and the change in the pressure is monitored. And when the said pressure falls below a predetermined threshold value, it determines with the leak which the repair or replacement | exchange of the inner shell 1a or the outer shell 1b has generate | occur | produced.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) In the said embodiment, although the example which formed the support stand 3 with solid materials, such as a concrete structure, is given, this invention is not limited only to this.

  For example, as shown in FIGS. 7 and 8, the support base 3 can be formed using a plate material such as a synthetic resin in which metal and reinforcing fiber are combined, or carbon fiber.

  Specifically, the support base 3 is configured to include a curved plate 3a, a cylindrical frame 3b, and a plurality of reinforcing plates 3c.

  The curved plate 3a is curved in a concave shape like a bowl shape or a mortar shape, and is fixed to the upper opening of the cylindrical frame 3b using, for example, welding, an adhesive, or a fastening member (bolt, nut, etc.). ing.

  The plurality of reinforcing plates 3c are fixed using, for example, welding, an adhesive, or fastening members (bolts, nuts, etc.) from the bottom surface of the curved plate 3a to the inner peripheral surface of the cylindrical frame 3b.

  And when installing such a support stand 3 on the inner bottom part of the storage part 2, the lower part of the cylindrical frame 3b is embedded in solid materials, such as the said concrete structure, so that it may fix and unite. It has become.

  Also in this case, the buffer member 4 is arranged between the tank 1 and the support base 3 as in the embodiment shown in FIGS.

  Also in the case of this embodiment, the same operation and effect as the embodiment shown in FIGS. 1 to 5 can be obtained.

  (2) In the above embodiment, an example in which an SF double shell tank is adopted as the tank 1 is given, but the present invention is not limited to this.

  For example, although not shown, the tank 1 shown in the above embodiment can be a single-shell tank. In this case, the equipment for detecting liquid leakage from tank 1 is described in “Illustration, Quick Reference 2 of Dangerous Goods Facility Standards” issued by Tokyo Law Publishing Co., Ltd., supervised by the Tokyo Fire Department. It is preferable to equip the liquid leak detection equipment for the single-shell tank.

  The present invention can be suitably used when a cylindrical tank is installed vertically in the ground.

1 tank
1a Inner shell
1b outer shell
2 storage
3 Support stand
4 cushioning members
5 steady rest
6 granular material
7 Liquid leak detection device
7a Liquid leak detection tube
7b Detector
8a Linear gap
8b Circular gap

Claims (4)

A tank shape and a circular cylinder shape lower rounded,
A storage unit provided in the ground and in which the tank is stored and arranged vertically;
A support base installed on the inner bottom of the storage unit and mounted with the tank;
A buffer member interposed between the upper surface of the support base and the lower portion of the tank;
A steadying member laid between a shoulder portion of the tank and an inner wall portion of the storage portion so as to restrict lateral movement of the tank,
The upper surface of the support base is formed in a concave shape so that the lower part of the tank is fitted ,
The buffer member is arranged so that a plurality of fan-shaped sheets are circular with a predetermined gap therebetween, and the gap between the concave upper surface of the support base and the lower portion of the tank is provided by the gap. A tank underground installation structure characterized in that a gap from the periphery of the tank to the deepest position is secured . In the underground installation structure of the tank according to claim 1,
An underground installation structure for a tank, wherein an inner bottom portion of the storage portion and the support base are both made of a concrete structure, and the support base is integrated with the inner bottom portion. In the underground installation structure of the tank according to claim 1 or 2,
A space between the storage unit and the tank is filled with a large amount of granular members. In the underground installation structure of the tank according to any one of claims 1 to 3,
Further comprising a liquid leakage detection device for detecting liquid leakage from the tank;
The tank includes a metal inner shell in which the liquid is stored, and a synthetic resin outer shell that is coated on the outside of the inner shell so as to be non-adhering to at least a region from the shoulder portion to the lower portion of the inner shell. A double shell structure including a shell,
The liquid leak detection device is inserted into the tank along the vertical direction, the upper side protrudes outward from the upper part of the tank, and the lower opening is between the deepest position of the inner shell and the outer shell. A leak detector tube arranged to be exposed to the
A detection unit that is provided in the liquid leak detection tube and determines whether or not the liquid is leaking from the inner shell based on the liquid level of the liquid flowing into the liquid leak detection tube. The underground installation structure of the tank.

Images