JP2001199499A - Heat-insulating structure for assembly type stainless steel liquid storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-insulating structure for simply installing a thermal insulating material on the outer face of a liquid storage tank and also removing the same therefrom and securely preventing the diffusion of heat. SOLUTION: Bonding edges 13 of a plurality of stainless steel plate unit plate 11 are faced to them same side, and the bonding edges 13 are successively welded one another to form a side wall Ta and a ceiling wall Tc, and the bonding edges 13 of the side wall Ta and the ceiling wall Tc are faced inward and welded integrally with a bottom wall Tb to form the liquid storage tank T. Then engaging members 31 are provided on the outer surface of the unit plates 11 and an inward thermal insulating material 32 of high heat-resistant temperature and an outward thermal insulating material 33 of low heat-resistant temperature and provided with self- extinguishing properties having recesses 32x and 33x respectively almost corresponding to swelling sections 122 of the unit plates 11 and formed into the size almost same as the sizes of faces of the unit plates 11 are respectively laminated in the above order outside respective unit plates 11, and then exterior plates 34 are brought into contact with the outer surface of the outward thermal insulating material 33 and fixed through the engaging members 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat retaining structure for a prefabricated stainless steel storage tank.

[0002]

2. Description of the Related Art Generally, schools, hospitals, apartment houses, factories, and the like are provided with liquid storage tanks for storing various liquids such as drinking water.

As shown in FIG. 15, this liquid storage tank T is usually formed in a shallow box shape by a substrate 2 having a right-angled quadrilateral and a joining edge 3 rising from four sides of the substrate 2 to the same side. The unit plates 1 are connected in order to form a side wall Ta, a bottom wall Tb, a ceiling wall Tc or a partition wall or a rectifying wall (not shown), and these side walls Ta, a bottom wall Tb, a ceiling wall Tc, or a not-shown partition wall. And it is formed by assembling a rectifying wall.

As a material of the unit plate 1, a metal such as iron, stainless steel, aluminum or the like or a synthetic resin such as FRP is employed. Among these, from the viewpoints of fire resistance, seismic strength, corrosion resistance, aesthetics, etc., in recent years, prefabricated stainless steel storage tanks formed by assembling unit plates made of stainless steel plates have been widely adopted. .

In this case, if the substrate 2 of the unit plate 1 is thin and flat, the amount of deflection (amount of distortion) of the substrate 2 when a load is applied to the substrate 2 is very large, and the pressure resistance is very small. . For example, when the thickness of the substrate 2 of the unit plate 1 forming the side wall Ta is thin and flat, the substrate 2 is largely bent by the liquid pressure in the liquid storage tank T. Further, as the liquid level in the liquid storage tank T goes up and down, stress is repeatedly applied to the substrate 2. Therefore, the thin and flat substrate 2 is easily broken even by repeated small pressures. Also,
If the thickness of the substrate 2 of the unit plate 1 that forms the ceiling wall Tc is thin and flat, it may be dangerous because it suddenly largely bends when an operator or the like rides on it. For this reason, the unit plate 1 is usually
The bulging portion 21 is formed on the substrate 2 so that even if the substrate 2 is thin, the amount of bending is small, and the pressure resistance is improved.

As such a bulging portion 21, there is a bulging portion having a square shape, an octagonal shape, a circular shape, a cross shape, an X shape, or the like formed on substantially the entire surface of the substrate 2 or at the center thereof. As the bulging direction, there is one that protrudes to the protruding side of the joining edge 3 or the opposite side.

The joining edge 3 of the unit plate 1 has a 90-degree flange that stands vertically from the edge of the substrate 2 and an angle of about 135 degrees with the substrate 2 between the substrate 2 and the 90-degree flange. Some have a slanted collar 3A that is slanted at the center.

In the case where such a liquid storage tank T is required to have particularly high heat retaining performance and dew condensation resistance, it is usually possible to prevent heat diffusion by providing a heat insulating material and a cover on the unit plate 1 in order. (For example, see JP-A-59-187).
No. 582).

Further, as described in Japanese Utility Model Publication No. 6-28477 and Japanese Utility Model Application Laid-Open No. 3-17094, a liquid storage tank in which a unit plate is provided with two layers of heat insulating material is also known.
In particular, Japanese Utility Model Publication No. 6-28477 discloses that two types of heat insulating materials having different heat-resistant grades are combined.

[0010]

However, in the heat retaining structure described in Japanese Utility Model Publication No. Hei 6-28477, when the surface of a unit plate is inspected or the cover or the heat insulating material is replaced, the adjacent unit plate is replaced. The bolts and nuts that fasten the joining edges of the above are in the way, and the cover and heat insulating material cannot be taken out. That is, in order to take out the cover and the heat insulating material, all the bolts and nuts attached to the entire periphery of the joining edge of the unit plate must be removed, and the workability is significantly reduced. Also, if all bolts and nuts that fasten the joining edge of the unit plate used for the liquid contacting part are removed, the liquid stored in the liquid storage tank will flow out. It is necessary to remove the liquid, and it is necessary to inject the liquid into the liquid storage tank again after the work is completed. Therefore, there is a problem that not only the work is complicated but also the work time is long.

In the heat retaining structure described in Japanese Utility Model Laid-Open Publication No. 3-17094, a heat insulating material is formed by using a joiner receiver and a joiner fastened together by bolts and nuts that fasten joint edges of adjacent unit plates. The edge portion is sandwiched, and the heat insulating material covers almost the entire surface of the unit plate. However, the joiner receiver and the joiner merely hold the heat insulating material and do not strongly hold down the heat insulating material. Therefore, as shown in FIG. 1 of the publication, a gap is easily generated between the outer surface of the unit plate and the heat insulating material. In addition, since the periphery of the heat insulating material is not in close contact with the joining edge of the unit plate, the gap is in communication with the atmosphere, and heat insulation, cold insulation,
The heat insulation performance, such as the prevention of dew condensation, is significantly reduced. For example, when the liquid stored in the liquid storage tank is at a high temperature of 80 to 100 ° C. or at a low temperature of around 0 ° C., it is very difficult to maintain a predetermined temperature.

The present invention has been made in view of such a problem, and not only can the heat insulating material be easily attached or detached, but also can prevent the diffusion of heat reliably and maintain a constant liquid temperature. It is intended to provide a heat retaining structure of a prefabricated stainless steel storage tank which can be maintained at a low temperature.

[0013]

According to a first aspect of the present invention, there is provided a rectangular quadrangular substrate having a bulging portion formed substantially at a center portion, and two or three orthogonal sides of the substrate. A plurality of stainless steel unit plates having a plurality of joining edges continuous to four sides and bent to the opposite side to the swelling direction of the swelling portion, butted portions of adjacent joining edges are welded. While directing the joining edge to the same side, welding the adjacent joining edges to form at least a side wall and a ceiling wall, and facing the joining edge of the stainless steel unit plate forming these side walls and the ceiling wall inward, In the assembly type liquid storage tank formed by placing the side wall and the ceiling wall on the bottom wall and welding to the body, a locking member is provided on the outer surface of the unit plate, and the bulging portion of the unit plate is substantially provided. It has a corresponding recess and a size almost the same as the size of the unit plate. The inner heat insulating material having a high heat-resistant temperature and the outer heat insulating material having a low heat-resistant temperature and having self-extinguishing property are stacked in this order on the outer side of the unit plate, and the outer panel is provided on the outer surface of the outer heat insulating material. To fix the exterior plate together with the inner heat insulating material and the outer heat insulating material via a locking member, and to a corner portion formed at a butt portion between the side walls and a butt portion between the side wall and the ceiling wall. A corner heat insulating material is disposed at each of the formed corner portions, and an exterior plate is disposed outside the corner heat insulating material.

According to a second aspect of the present invention, there is provided a rectangular quadrangular substrate having a bulging portion formed substantially at a central portion thereof, and the bulging portion being continuous with two or three or four orthogonal sides of the substrate. With a plurality of joining edges bent in the opposite direction to the bulging direction, and abutting portions of adjacent joining edges are directed to the same side of the joining edges of the plurality of stainless steel unit plates welded together, Adjoining joining edges are welded to each other to form at least the side wall and the ceiling wall, and the joining edge of the stainless steel unit plate forming the side wall and the ceiling wall is directed inward, and the side wall and the ceiling wall are mounted on the bottom wall. In the assembly type liquid storage tank formed by being placed and integrally welded, a locking member is provided on the outer surface of the unit plate, has a concave portion substantially corresponding to the bulging portion of the unit plate, and has the size of the unit plate. High heat-resistant temperature formed to almost the same size The inner heat insulating material and the outer heat insulating material having a low heat-resistant temperature and having self-extinguishing properties are stacked in this order on the outer side of the unit plate, and the central portion and / or the inner portion between the unit plate and the inner heat insulating material are stacked. A gap is provided at a central portion between the outer heat insulating material and the outer heat insulating material, the outer plate is brought into contact with the outer surface of the outer heat insulating material, and the outer plate is locked together with the inner heat insulating material and the outer heat insulating material. The corner insulation formed at the corners formed at the abutting portions of the side walls and the corners formed at the abutting portions of the side walls and the ceiling wall, respectively, are arranged at the corners formed at the abutting portions of the side walls and the ceiling wall. An exterior plate is provided.

The invention according to claim 3 is characterized in that a heat retaining member made of a heat-resistant material is provided over the entire outer surface of the unit plate so as to directly contact the unit plate.

According to a fourth aspect of the present invention, a peripheral strip is formed near the peripheral edge of the substrate of the unit plate and / or near the peripheral edge of the exterior plate, and the peripheral strip is formed near the peripheral edge of the inner heat insulating material and / or the outer heat insulating material. A circumferential groove capable of accommodating the strip is formed.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a heat retaining structure of a prefabricated stainless steel storage tank according to the present invention.

The liquid storage tank T includes a side wall Ta and a ceiling wall Tc formed by sequentially welding a plurality of unit plates 11 made of a stainless steel plate, and a flat bottom wall laid on a concrete or steel base. It is formed in combination with Tb.

A locking member 31 is provided on the outer surface of each unit plate 11 constituting the side wall Ta and the ceiling wall Tc.
Here, the inner heat insulating material 32 and the outer heat insulating material 33 formed to have substantially the same size as the unit plate 11 are stacked on the outer side of the unit plate 11 in this order, and the outer surface of the outer heat insulating material 33 is formed. The outer plate 34 is brought into contact with the inner heat insulating material 3.
2 and the outer heat insulating material 33 together with the locking member 31 via a locking member 31. Also, a corner formed at a butt portion between the side walls Ta and a corner formed at a butt portion between the side wall Ta and the ceiling wall Tc. Corner heat insulating material 35 is arranged, and exterior plate 36 is provided outside corner heat insulating material 35.
Is provided, the heat retaining structure of the liquid storage tank T is formed.

The unit plate 11 includes a rectangular quadrangular substrate 12,
It has a plurality of joining edges 13 continuously bent to the same side on four sides of the substrate 12, and bulges out at a substantially central portion of the substrate 12 in a direction opposite to the bending direction of the joining edges 13. Bulged part 122
Are formed.

Further, the side wall Ta and the ceiling wall Tc have the joining edge 13 of the unit plate 11 facing the same side, and the adjacent unit plate 1
One joining edge 13, 13 is formed by welding. Then, the joining edge 13 of the unit plate 11 of the side wall Ta and the ceiling wall Tc faces inward, and the side walls Ta, the side wall Ta and the ceiling wall Tc, and the butting portion of the side wall Ta and the bottom wall Tb, for example, a ridge line portion Are assembled, whereby the liquid storage tank T is assembled.

First, the unit plate 11 made of a stainless steel plate
Will be described with reference to FIG.

As shown in FIGS. 2A and 2B, the unit plate 1
According to the development view of No. 1, a plate is removed from a stainless steel plate. More specifically, the outer peripheral edge 131 of each joining edge 13 extends along the side edge 132 of each adjacent joining edge 13 from the intersection where the bending line X at which the joining edge 13 is bent with respect to the rectangular quadrilateral substrate 12 is orthogonal. To form a notch K in which the notch k leading to the notch and the partially notched through-hole X0 provided at the intersection are connected. In other words, the board 12 is trimmed so that the joining edges 13 are integrally continuous with the four sides of the board 12.

Next, as shown in FIGS. 2C and 2D,
A peripheral strip 121 having a concave cross section is formed in the vicinity of the peripheral edge of the plate-shaped substrate 12 by using a mold (not shown). The projecting direction of the circumferential ridge 121 having a concave cross section may be the same direction as the joining edge 13, or may be the opposite direction to the direction of the joining edge 13. In addition, as the cross-sectional shape, an arbitrary shape such as a semicircular shape, a trapezoidal shape, or a substantially triangular shape is adopted.

Thereafter, as shown in FIGS. 2E and 2F,
Each bonding edge 13 is vertically bent to the same side along the bending line X with respect to the substrate 12, and the through-hole X <b> 0 and the bonding edge provided at the intersection where the ridge formed by the substrate 12 and the bonding edge 13 are orthogonal to each other. 13, side edges 132, 1 of adjacent joining edges 13, 13 abutted by bending
32 is welded and formed into a box shape. In this case, welding of the butted portion of the partially cut-through hole X0 and the side edge 132 of the adjacent joining edge 13 is performed so that rainwater, insects, and the like do not enter, and the liquid such as drinking water in the liquid storage tank T is welded. Care should be taken not to leak out.

Thereafter, as shown in FIG. 2 (g), the box-shaped body is placed on the lower mold 2 of the manufacturing apparatus 20 with the joining edge 13 facing upward.
1, the upper mold 22 is lowered, and the peripheral portion of the box-shaped substrate 12 is pressed and held between the lower mold 21 and the upper mold 22. At this time, the peripheral rim 121 of the box-shaped body is sandwiched and positioned by the convex ridge 21a formed on the lower mold 21 and the concave groove 22a formed on the upper mold 22. That is, on the upper surface of the lower die 21 having the concave portion 21x, a convex ridge 21a having a cross-sectional shape capable of being fitted into the peripheral line 121 of the substrate 12 is formed. Is formed with a concave groove 22a having a cross-sectional shape into which the circumferential streak 121 can be fitted.
By lowering the upper mold 22, the box-shaped substrate 12
Of the lower die 21 and the concave groove 22a of the upper die 22 are pressed and held for positioning.

Next, the middle mold 23 having the bulging portion 231 is lowered and the substrate 12 is pressed to form a bulging portion 122 inside the peripheral streak 121 of the substrate 12 (FIG. 2).
(G)). At this time, the peripheral strip 121 of the substrate 12 is
1 and the upper die 22 are firmly pressed and held and positioned, so that the peripheral edge of the substrate 12 and the joining edge 13 are dragged to cause sink marks and wrinkles, or the entire substrate is warped, twisted, or deformed. Can be reliably prevented.

A liquid L such as water or water mixed with an anticorrosive is injected into the recess 21x of the lower mold 21. The injection amount is such that the bulging portion 231 of the middle mold 23 descends and the substrate 1
When the bulging portion 122 is formed in the second mold 2, the amount is set to be equal to or more than the amount that the concave portion 21 x of the lower mold 21 is filled with water. In addition, on the upper surface of the lower mold 21, a sealing material 24 is provided so as to be located inside the protruding ridge 21a. Then, the upper mold 22 is lowered,
When the peripheral portion of the substrate 12 is pressed and held between the lower mold 21 and the upper die 22, the sealing material 24 is pressed down by the lower surface of the peripheral portion of the substrate 12. Here, medium size 23
The bulging portion 231 is lowered, whereby the bulging portion 122 is formed on the substrate 12. At this time, the liquid L injected into the concave portion 21x of the lower mold 21 fills the concave portion 21x, and the liquid pressure acts to push up the substrate 12 from below to above. Therefore, the bulging portion 122 of the substrate 12
Is sharply formed corresponding to the shape of the bulging portion 231 of the middle die 23. In addition, the dimensional accuracy of the bulging portions 122 of the unit plates 11 formed one after another becomes uniform.

Here, as the sealing material 24 disposed on the upper surface of the lower mold 21, any material such as an O-ring, a string-shaped packing, a sheet packing, or the like is adopted. Also, the number is not limited to one, and a plurality may be provided.

The unit plate 11 thus manufactured is
As shown in FIG. 2 (h), the substrate 12 is formed of a right-angled quadrilateral substrate 12 and bonding edges 13 which stand on the four sides of the substrate 12 vertically from the substrate 12 to the same side. Through hole X0 provided at the intersection of the ridges formed by the rectangular cross sections and the side edges 1 of the adjacent joining edges 13, 13
32, 132 butted portions are welded. In the vicinity of the periphery of the right-angled quadrilateral substrate 12, the joining edge 13 is provided.
A concave ridge 121 is formed on the protruding side of
A bulged portion 122 is formed inside the circumferential rim 121 so as to protrude to the side opposite to the side where the joining edge 13 protrudes.

Only the unit plates 11 provided with the joining edges 13 which stand perpendicularly to the substrate 12 on the four sides of such a rectangular quadrilateral substrate 12 are sequentially connected to form the side wall Ta, the ceiling wall Tc, and the bottom wall Tb. Although it is possible to form and assemble the liquid storage tank T, various liquid storage tanks T having different external shapes can be formed by variously deforming the joining edge 13 of the unit plate 11.

In the following, referring to FIG. 6, a description will be given of the unit plates 11A arranged at the left and right edges of each side wall Ta and the unit plates 11B arranged at the corners of the ceiling wall Tc.

As shown in FIG. 4B, the unit plate 11A disposed on the left and right end portions of the side wall Ta has the joining edges 13 continuous with three sides of the substrate 12 bent vertically. On the other hand, the other joining edge 13A is approximately 13
It is bent at an angle of 5 degrees. That is, the joining edge 1
3A is formed at an angle of about 45 degrees with the inner surface of the substrate 12.

In this case, if the width of the joining edge 13A is equal to the width of the joining edge 13 adjacent thereto, the joining edge 13A
Is bent at an angle of about 135 degrees with respect to the substrate 12, so that a projection having an angle of about 135 degrees is formed between the side edge 132 of the joining edge 13 and the outer peripheral edge 131. Sometimes there is a risk of unexpected injury. Therefore,
Preferably, the protrusion is chamfered or the like.
Specifically, the side edge 132 of the joining edge 13 adjacent to the side edge 132 of the joining edge 13A is the side edge 13 of the joining edge 13A.
2 and a chamfered portion 132b connected at a gentle angle to the tip of the butted portion 132a.

When manufacturing the unit plate 11A disposed on the edge of the side wall Ta, the plate is removed from a stainless steel plate according to the development shown in FIG. In particular,
Outer edge 1 of each joining edge 13 (13A) along the side edge 132 of each adjacent joining edge 13 (13A) from the intersection where the bending line X at which the joining edge 13 (13A) is bent is orthogonal
In addition to forming notches K and K1 in which a notch k reaching 31 and a partially notched through hole X0 provided at the intersection are formed, the notch K is integrally formed with the right-angled quadrilateral substrate 12 and three sides of the substrate 12. And a joining edge 13A integrally continuous with another side.

After the board is removed in this manner, a peripheral strip 121 is formed near the peripheral edge of the substrate 12, and as described above,
After bending the joining edges 13 and 13A vertically upward, the bulging portion 12
2 is formed (see FIG. 4A).

Next, the side edge 1 of the joining edge 13A of the box-shaped body
32 abuts against a butting portion 132a of a side edge 132 of a corresponding adjacent joining edge 13. Thereafter, the notch through hole X0 is welded, and the adjacent joint edge 1 is welded.
The butted portions of the side edges 132 of 3, 13 and 13 and 13A are welded to form the unit plate 11A (see FIG. 4B).

The cutout k and the partially cutout through-hole X0
After forming notches K and K1 connected to the substrate 12, the substrate 12
A peripheral rim 121 is formed on each of the joining edges 1 with respect to the substrate 12.
3 and 13A are bent to partially weld the notched through hole X0, and the adjacent joining edges 13, 13 and 13, 13
The butted portion of the side edge 132 of A may be welded, and then the bulged portion 122 may be bulged on the substrate 12 to form the unit plate 11A.

Unit plate 1 disposed at the corner of ceiling wall Tc
1B, as shown in FIGS. 5A, 5B, and 5C, the substrate 1
2 and a bonding edge 1 formed on two orthogonal sides of the substrate 12.
3 When removing the unit plate 11B,
As shown in FIG. 5D, each of the joining edges 13 adjacent from the intersection where the bending line X at which the joining edge 13 is bent is orthogonal to each other.
A notch K is formed by connecting a notch k extending along the side edge 132 to the outer peripheral edge 131 of each joining edge 13 and a partially notched through hole X0 provided at the intersection.

The length of each joining edge 13 of the unit plate 11B is shorter than at least the dimension obtained by subtracting the width of the joining edge 13 of the unit plate 11A disposed at the left and right end portions of the side wall Ta. Is formed. Therefore, the unit plates 11A, 1 forming the upper corners of the orthogonal side walls Ta, Ta
1A, the substrate 1 of the unit plate 11B
Out of the two peripheral portions, the peripheral portions on two orthogonal sides where the joining edge 13 is not formed can be placed.

It is to be noted that, although not shown in detail, the unit plates provided on the peripheral edge portion other than the corner portion of the ceiling wall Tc are not shown in detail.
The joining edges 13 are formed on three sides of the substrate 12, and the two opposite sides are joined so that the peripheral edge of the remaining one side is placed on the joining edge 13 of the unit plate 11 forming the upper edge of the side wall Ta. Rim 13
May be formed short.

Thus, the unit plates 11, 11A, 11
B, etc., the joining edges 13 of the unit plates 11 and 11A are directed to the same side, and the adjacent joining edges 1
The side walls Ta are formed by welding 3 and 13 together. In this case, the joint edges 13A of the unit plates 11A arranged on the left and right edges of the side wall Ta are arranged so as to be located on the left and right edges of the side wall Ta. In addition, the joining edges 13 of the unit plates 11 and 11B and the unit plates disposed on the peripheral portion (not shown) are directed to the same side, and the adjacent joining edges 13 and 13 are welded to the ceiling wall T.
Form c. In this case, the unit plates 11B attached to the corners of the ceiling wall Tc are arranged such that the peripheral edges of two orthogonal sides of the substrate 12 on which the joining edges 13 are not formed are located at the corners of the ceiling wall Tc. Is established. Further, the unit plate attached to the peripheral edge of the ceiling wall Tc is disposed such that the peripheral edge of one side of the substrate 12 where the joining edge 13 is not formed is located at the outer peripheral edge of the ceiling wall Tc.

A side wall Ta and a ceiling wall Tc are formed by using these unit plates 11, 11A, 11B, etc.
In order to make the joining edge 13 of the side wall Ta and the ceiling wall Tc inward, the ridge portion where the side walls Ta are butted, that is, the joining edges 13A and 13A are welded, and the side wall Ta and the ceiling wall Tc are joined together. The abutting ridge, that is, the joining edge 13 and the substrate 12 are welded. Also, the side wall T
A ridge line portion where a and the bottom wall Tb abut, that is, the joining edge 13 and the bottom wall Tb are welded. In this case, sufficient care should be taken to prevent the liquid in the reservoir T from leaking to the outside and to prevent the reservoir T from being destroyed by an earthquake or a sloshing phenomenon that occurs during an earthquake. And do it carefully. Thus, the liquid storage tank T can be formed (see FIG. 6).

In the liquid storage tank T shown in FIG. 6, an extraction flange 15 is provided on one unit plate 11 constituting one side wall Ta.
Is connected to a pipe 16 having a ceiling wall Tc.
1 illustrates a case where a manhole M is formed in one unit plate 11 that constitutes the above. The substrate 12 of the unit plate 11
Although the case where the bulging portion 122 protruding in a spherical shape is formed is illustrated, the shape of the bulging portion 122 is not particularly limited, and an arbitrary shape can be selected. In this case, if a flat surface is formed in a part of the bulging portion 122, this can be used for connecting pipes, attaching various accessories to the inner and outer surfaces of the liquid storage tank T, and the like.

In the above-described embodiment, after the joining edge 13 is bent with respect to the board 12 made of a plate material,
Although the process of forming the bulging portion 122 in FIG. 2 has been described, the bonding edge 13 may be bent with respect to the substrate 12 after forming the bulging portion 122 in the board 12 made of a plate material.

Further, the bottom wall T forming the above-described liquid storage tank T is formed.
As b, a plate-like stainless steel plate laid on a gantry has been exemplified, but a plurality of unit plates 11 may be connected and formed similarly to the side wall Ta and the ceiling wall Tc. in this case,
The joining edge 13 may be directed inward or outward.

When the liquid storage tank T is assembled in this manner, the locking members 31 are attached to the outer surfaces of the side wall Ta and the ceiling wall Tc.
Is fixed, and each unit plate 1 is
1, an inner heat insulating material 32, an outer heat insulating material 33, and an exterior plate 34 are attached to the outer surface, and a corner formed at a butt portion between the side walls Ta and a butt portion between the side wall Ta and the ceiling wall Tc. A corner heat insulating material 35 and a corner exterior plate 36 are attached to the corner portions to be formed.

The locking member 31 is composed of a screw rod 311 welded to each of the unit plates 11 constituting the side wall Ta and the ceiling wall Tc near four corners on the outer surface side of the substrate 12, and a nut 312 which can be screwed to the screw rod 311. It is composed of However, as will be described later, any material can be used as long as it can fix the heat insulating materials 32 and 33 and the exterior plate 34 and the like. For example, a bolt, a locking tool, or the like can be used, and the screw rod 311 and the nut 312 can be used. However, the present invention is not limited to the locking member 31 made of

The inner heat insulating material 32 is made of a heat insulating material having a high heat-resistant temperature, for example, heat-resistant foam polystyrene, has a concave portion 32x substantially corresponding to the bulging portion 122 of each unit plate 11, and has a substantially uniform thickness. The unit plate 11 is formed to have substantially the same size as the unit plate 11, and mounting holes 32a corresponding to the screw rods 311 are provided at four corners thereof (see FIG. 1).

The outer heat insulating material 33 is made of a heat insulating material having a low heat-resistant temperature and self-extinguishing property, that is, a heat insulating material such as foamed polystyrene, which does not spread even if ignited and does not spread. It has a concave portion 33x substantially corresponding to the bulging portion 32y on the outer surface of the heat insulating material 32, has a substantially uniform thickness, is formed to have substantially the same size as the size of the unit plate 11, and has four corners corresponding to the screw rods 311. Mounting holes 33a are provided (see FIG. 1).

The thickness of the heat insulating material of the liquid storage tank is set to 25 mm or more as specified in the Ministry of Construction common specifications.
Specifically, the thickness of the heat insulating material of the liquid storage tank is set to 25 to 120 mm according to various heat retention specifications such as prevention of dew condensation, cold insulation, heat insulation at about 20 to 80 ° C., and heat insulation at about 80 to 100 ° C. . In the case of the present application, the thickness of the heat insulating materials 32 and 33 of the liquid storage tank T is set to 12.5 to 60 mm, respectively, and usually 25 to 50 mm.

The exterior plate 34 is made of a metal plate such as an aluminum plate or a stainless steel plate, has a concave portion 34x substantially corresponding to the bulge portion 33y on the outer surface of the outer heat insulating material 33, and has a size substantially equal to the size of the unit plate 11. It is formed in the same size, and mounting holes 34a corresponding to the screw rods 311 are provided at the four corners (see FIG. 1).

The corner insulating material 35 is made of a heat insulating material similar to the inner heat insulating material 32, for example, heat-resistant foam polystyrene or glass wool.
2 and the outer heat insulating material 33 are formed in a substantially right-angled isosceles triangular shape having two sides substantially corresponding to the sum of the thicknesses of the outer heat insulating material 33.

The corner exterior member 36 is made of a metal plate such as an aluminum plate or a stainless steel plate, like the exterior plate 34, covers the outer surface of the corner heat insulator 35, and can be attached by the screw rod 311 of the locking member 31. Notched portions (or long holes) 36a are formed at the four corners, into which the screw rods 311 can be inserted.

Next, the procedure for forming the heat retaining structure will be described.

First, screw rods 311 are fixed to the side walls Ta and the ceiling wall Tc of the liquid storage tank T near the four corners on the outer surface side of the substrate 12 of each unit plate 11 by welding. Next, the inner heat insulating material 32 is attached to the outer surface of the substrate 12 of each unit plate 11. That is, the screw rod 311 is inserted into each mounting hole 32a of the inner heat insulating material 32. Similarly, the screw rod 311 is inserted into each mounting hole 33a of the outer heat insulating material 33. That is,
The inner heat insulating material 32 and the outer heat insulating material 33 are stacked in this order on the outer surface of each unit plate 11 constituting the side wall Ta and the ceiling wall Tc using the screw rod 311. Next, the exterior plate 34 is attached to the outer surface of the outer heat insulating material 33. That is, the screw rod 311 is inserted into each of the mounting holes 34 a of the exterior plate 34, and the exterior plate 34 is brought into contact with the outer surface of the outer heat insulating material 33. Thereafter, the nut 312 is screwed into the screw rod 311 and the inner heat insulating material 32, the outer heat insulating material 33, and the exterior plate 34 are integrally fixed.

On the other hand, after the corner heat insulating material 35 is provided at the corner formed at the abutting portion between the side walls Ta and at the corner formed at the abutting portion between the side wall Ta and the ceiling wall Tc, the corner exterior plate 36 is provided. The screw rod 311 is inserted through each of the cutouts (or long holes) 36a, and the corner exterior plate 36 is fixed by the nuts 312.

FIG. 1 shows a case where the inner heat insulating material 32, the outer heat insulating material 33, and the outer plate 34 provided on the unit plate 11 to which the pipe 16 is attached are each vertically divided into two parts. When the inner heat insulating material 32, the outer heat insulating material 33, and the exterior plate 34 are divided into upper and lower (or left and right) parts, the unit plate 11 to which the pipe 16 is attached can be easily attached or detached. be able to.

In the above-described embodiment, the case where the corner heat insulating material 35 is formed in a substantially right-angled isosceles triangular shape with a heat insulating material similar to the inner heat insulating material 32 is exemplified. It may be formed in a two-layer structure of a heat insulating material conforming to the outer heat insulating material 33 (see FIG. 10). Further, the cross-sectional shape of the heat insulating material attached to the corner portion is not limited to a right-angled isosceles triangle, but may be a fan shape or a square shape. Corner exterior plate 36 in that case
Are formed in a shape corresponding to the cross-sectional shape of the heat insulating material in the corner portion. In addition, the heat insulating material in the corner portion is the inner heat insulating material 3.
It is not always necessary to have two sides corresponding to the sum of the thickness of the second heat insulating material 33 and the thickness of the outer heat insulating material 33, and the size may be such that a gap is formed between the corner outer plate 36 ( (See FIG. 7).

The case where the exterior plate 34 and the corner exterior plate 36 are formed separately has been exemplified. However, the edge of the exterior plate 34 attached to the unit plate 11A disposed on the left and right edge portions of the side wall Ta is illustrated. So that the corner heat insulating material 35 can be covered by a portion or an edge of an exterior plate 34 attached to a position corresponding to a unit plate 11B or the like provided at a corner or a peripheral portion of the ceiling wall Tc. A screw rod 311 and a nut 312 that are extended and fixed to the unit plate 11 disposed on the left (or right) edge or the upper edge of the adjacent side wall Ta.
You may make it fix using.

Further, as shown in FIG. 7, the peripheral portion of the exterior plate 34 may be bent inward vertically to form a folded portion 341. When the folded portion 341 is formed on the exterior plate 34 in this manner, the strength of the exterior plate 34 is improved, and deformation is less likely to occur, and the appearance is beautiful. In this case, it is preferable to form an insertion portion corresponding to the folded portion 341 of the exterior plate 34 on the outer peripheral edge of the outer heat insulating material 33. Folded portion 34 formed on the periphery of exterior plate 34
The shape 1 is not limited to a vertical shape, but may be any shape such as an inclined shape (see FIG. 8), an L shape (see FIG. 9), an arc shape (see FIG. 10), and the like. Also, if a folded portion 341 as shown in FIGS. 8, 9 and 10 is formed and the butting portion of the adjacent exterior plates 34 and 34 is filled with the caulking material C, rain water or It is possible to reliably prevent a decrease in the heat insulating performance of the heat insulating materials 32 and 33 due to the intrusion of high humidity outside air. Therefore, when the liquid storage tank T is installed outdoors or on the roof of a building, it is preferable to adopt such a structure.

FIG. 7 shows a case where a holding plate (for example, a washer) 313 is used as the locking member 31 together with the screw rod 311 and the nut 312.

FIG. 8 shows the locking member 31 together with the bolts 314 and the nuts 312, together with the flat holding plate 3, which is disposed over the adjacent exterior plates 34, 34.
13 is used. In this case, bolt 3
The bolts 14 are inserted from inside to outside of the mounting holes formed near the four corners of the board 12 of the unit plate 11, and the bolt heads are fixed to the board 12 by welding. And the holding plate 313
Is inserted into a bolt 314, and a nut 3 is attached to the bolt 314.
12 is fastened, so that the adjacent exterior plates 34, 3
4 is held down.

Further, in FIG. 9, as the locking member 31,
A screw rod 311 provided with a mounting seat 314 and a holding plate 313 having a hat-shaped cross section that straddles the adjacent exterior plates 34, 34.
Is used. In this case, the mounting seat 314
Are welded and fixed to the outer surfaces of the butted portions of two or four unit plates 11 adjacent to each other. Heat insulating materials 32 and 33 and an outer plate 34 are stacked on the outer surfaces of these unit plates 11, and the holding plate 313 is attached to the screw rod 311. Attached, the screw rod 311
The nuts 312 are fastened to the outer peripheral plates 34, 34 so that the peripheral edges thereof are pressed and fixed.

In FIG. 10, the locking member 31 is
A case is shown in which a T-shaped support member 315 and an L-shaped pressing member 316 that can be fastened to both upper surfaces of the support member 315 are used. Also in this case, the support member 315 is fixed by welding to the outer surface of the butted portion of the two or four unit plates 11 adjacent to each other.
2 and 33 and the outer plate 34 are stacked,
By fastening the support members 316 to the support members 315 via bolts and nuts, the peripheral portions of the adjacent exterior plates 34, 34 are pressed. If a long hole extending in the vertical direction is formed in one of the support member 315 and the holding member 316, the fixing position of the holding member 316 can be adjusted, and the exterior plate 34 and the like can be firmly fixed. Can be.

In the embodiment shown in FIG. 10, the corner heat insulating material 35 is made of a heat insulating material having a fan-shaped cross section in accordance with the inner heat insulating material 32 and a heat insulating material having a fan-shaped cross section in accordance with the outer heat insulating material 33. It is formed in two layers with the material, and the corner exterior plate 36 is
The case where the corner heat insulator 35 is formed in a shape corresponding to the outer shape is shown.

In the above embodiment, each unit plate 11 forming the side wall Ta and the ceiling wall Tc is provided with two layers of the heat insulating material 3.
2 and 33 are illustrated, but two layers of heat insulating materials 32 and 33 are mounted only on the side wall Ta which is a liquid contact part of the liquid storage tank T, and one layer of heat insulating material is mounted on the ceiling wall Tc to keep the heat insulating structure. May be formed.

In the above-described embodiment, the case where the unit plates 11, 11B and the like are sequentially connected to form the ceiling wall Tc has been described. However, only the unit plates 11 are sequentially connected to form the ceiling wall Tc. (See FIG. 11). Also for such a ceiling wall Tc, an inner heat insulating material 32, an outer heat insulating material 33, and an outer plate 34 are sequentially stacked on each unit plate 11, and the locking member 31 (for example, the screw rod 311 and the nut 31) is stacked.
What is necessary is just to fix in 2). Similarly, at a corner formed by abutting the side wall Ta and the ceiling wall Tc, the corner heat insulating material 35 and the corner exterior plate 36 are provided, and the locking member 31 (for example, the screw rod 311 What is necessary is just to fix with a nut 312).

The bottom wall Tb of the liquid storage tank T shown in FIG. 11 is formed by sequentially connecting a plurality of unit plates 11 with the joining edges 13 facing downward. The substrate 12 of these unit plates 11 with the joining edge 13 facing downward is a flat surface. In order to prevent the board 12 of each unit plate 11 from bending, a reinforcing rib R having the same height as the joining edge 13 is welded to the outer surface of each board 12 vertically and horizontally. In a space defined by the reinforcing ribs R, an inner heat insulating material 32 and an outer heat insulating material 33 are sequentially arranged. Further, a corner heat insulating material 35 is arranged along the joining edge 13 provided on the outermost periphery of the bottom wall Tb, and the corner heat insulating material 35 is covered with a flat corner exterior plate 36.

As described above, the unit plates 11, 11A, 11
B and the like, and the joining edges 13 adjacent to each other are sequentially connected to the side wall Ta or the ceiling wall Tc.
Is formed by turning the joining edge 13 of the unit plate 11 constituting the side wall Ta and the ceiling wall Tc inward, placing the side wall Ta and the ceiling wall Tc on the bottom wall Tb, and welding them together. In the liquid storage tank T, the locking member 3 is attached to the outer surface of each unit plate 11 forming the side wall Ta and the ceiling wall Tc.
1 having a concave portion substantially corresponding to the bulging portion of the unit plate 11 and having the same size as that of the unit plate 11 and having a high heat-resistant temperature. The outer heat insulating material 33 having destructive properties is stacked in this order on the outer side of the unit plate 11, the outer plate 34 is brought into contact with the outer surface of the outer heat insulator 33, and the outer plate 34 is connected to the inner heat insulator 32 and the outer Is fixed together with the heat insulating material 33 via the locking member 31,
In addition, corner heat insulators 35 are disposed at corner portions formed at the butted portions of the side walls Ta and at the corner portions formed between the side walls Ta and the ceiling wall Tc. Exterior plate 36
Is provided, the heat insulating materials 32, 33 and the exterior plate 34 are attached to each unit plate 1 regardless of the joining edges 13, 13A of the unit plate 11.
1 can be stacked and mounted on the outer surface, and the mounting operation can be performed collectively in a short time. Further, if necessary, the exterior plate 34 and the heat insulating materials 33 and 32 attached to the outside of each unit plate 11 can be easily removed for maintenance and inspection.

In consideration of the magnitude of the liquid pressure of the liquid stored in the liquid storage tank T, the unit plate 11 and the side wall Ta of the ceiling wall Tc are taken into consideration.
The thickness of the unit plate 11 on the upper side of the unit plate 11 is small, and the thickness of the unit plate 11 on the lower side of the side wall Ta is increased.
Since the heat insulating materials 32 and 33 are disposed on the outer surface side of the unit 1, there is no relation to the thickness of the unit plate 11 (there is no need to consider whether the thickness of the joining edge 13 is thick or thin). ), The sizes of the heat insulating materials 32 and 33 and the size of the unit plate 11 can be made substantially the same. That is, heat insulating materials 32 and 33 of the same size are manufactured in advance, and if necessary,
It can be attached to an arbitrary unit plate 11 under the ceiling wall Tc, the upper part of the side wall Ta, and the lower part of the side wall Ta of the liquid storage tank T.

Therefore, the heat insulating materials 32, 33 can be standardized to have substantially the same size as the outer surface of the unit plate 11, and the heat insulating materials 32, 33 having the same shape can be mass-produced. Well, inventory management becomes easy.

Further, an inner heat insulating material 32 having a high heat-resistant temperature is attached to the outer surface of the unit plate 11, and an outer heat insulating material having a low heat-resistant temperature and having a self-extinguishing property is provided on the outer surface of the inner heat insulating material 32. Since the attachment 33 is provided, the heat insulation performance is high, and the cost of the entire heat insulation material can be reduced.
Further, since the corner heat insulating material 35 is provided at a corner formed by abutting the side walls Ta and a corner formed by abutting the side wall Ta and the ceiling wall Tc, the liquid storage tank T Heat does not escape from the ridge portion, and the heat insulating effect is further improved.

In this case, a self-extinguishing outer heat insulating material 33 is provided on the outside.
In the event of a fire, even if the heat insulating material 33 is temporarily burned by a flame, it does not spread,
Fire extinguishes naturally. For this reason, the liquid storage tank T installed in various buildings or factories does not spread even in the event of a fire. In addition, it is possible to prevent the burning of other combustible materials.

When three layers of heat insulating material are provided, and the heat insulating material directly in contact with the unit plate 11 is configured to withstand higher temperatures (see FIG. 12D), the heat insulating materials 32 and 33 and the exterior plate 34 are also provided. Can be the same as in the case of the two-layer structure.

Further, since the heat insulating material is not integrally fixed to the unit plate 11 in advance, the joining edge 13 of the adjacent unit plate 11 is not fixed.
The side walls Ta and the ceiling wall Tc are formed by sequentially welding each other, and when these side walls Ta and the ceiling wall Tc are welded to the bottom wall Tb to form a liquid storage tank T, heat generated by welding is used. There is no danger of melting, burning or burning the insulation. Therefore, without bothering with heat insulation,
The assembling work of the liquid storage tank T by welding can be performed efficiently. In addition, since the mounting of the heat insulating material may be performed at a time after the assembly work of the liquid storage tank T by welding is completed, not only the work time for mounting the heat insulating material is shortened, but also the heat insulating material may be damaged or melted. Finishes beautifully without burning.

By the way, the heat retaining structure of the liquid storage tank T of the above-described embodiment has a structure in which each unit plate 11 forming the side wall Ta and the ceiling wall Tc is provided with the bulging portion 12 formed on the substrate 12 of the unit plate 11.
And a bulging portion 32y formed on the outer surface of the inner heat insulating material 32.
The outer heat insulating material 33 having the concave portion 33x corresponding to the outer heat insulating material 33 is sequentially stacked, and the bulging portion 3 formed on the outer surface of the outer heat insulating material 33 is formed.
3y is fixed by covering an exterior plate 34 having a concave portion 34x corresponding to 3y, but the concave portions 32x and 33x, which are exactly the same as the outer surface shape of the bulging portion 122 of the unit plate 11, are formed by the inner heat insulating material 32 and the outer It is very difficult to form the heat insulating material 33 in consideration of the molding distortion at the time of molding the heat insulating material and the shrinkage and torsion after the molding. In particular, when the bulging portion 122 formed on the substrate 12 of the unit plate 11 has a complicated shape and pattern instead of a simple spherical shape, the concave portion having the same shape as the complicated shape and pattern is formed in the inner heat insulating material 32. It is extremely difficult to form the outer heat insulating material 33.

On the other hand, when the liquid level in the liquid storage tank T changes up and down, the liquid pressure applied to the side wall Ta changes. Therefore, the swelling portion 122 of the substrate 12 of the unit plate 11 forming the side wall Ta repeatedly swells outward and returns to its original state over a long period of time. here,
When the unit plate 11, the inner heat insulating material 32, the outer heat insulating material 33, and the outer plate 34 are in close contact with each other, when the bulging portion 122 of the unit plate 11 expands outward, the inner heat insulating material 32, The central portions of the heat insulating material 33 and the exterior plate 34 are pushed outward (see FIG. 12A). At this time, the inner heat insulating material 32, the outer heat insulating material 33, and the exterior plate 34 are
Since the swelling portion 122 does not deform following the shape when it swells outward and tries to maintain the original shape,
Each of these peripheral portions tends to separate from the peripheral portion of the unit plate 11. That is, the respective peripheral portions of the inner heat insulating material 32, the outer heat insulating material 33, and the exterior plate 34 tend to jump in a direction perpendicular to the outer surface of the unit plate 11. Therefore, an excessive force acts on the vicinity of the locking member 31. Moreover, these forces act repeatedly over a long period of time as the liquid level fluctuates.
The vicinity of each of the locking members 31 of the heat insulating materials 32 and 33 and the exterior plate 34 is easily deformed or broken.

In consideration of such points, a heat insulating material having elastic open cells which can very easily follow the deformation of the unit plate 11 may be employed. The heat insulation performance may be reduced. Therefore, it is more preferable to use various hard heat insulating materials such as a heat insulating material having closed cells. In this case, between the outer surface of the bulging portion 122 of the unit plate 11 and the inner surface of the concave portion 32x of the inner heat insulating material 32 and / or the outer surface of the bulging portion 32y of the inner heat insulating material 32 and the outer heat insulating material. It is preferable to provide a gap S between the material 33 and the inner surface of the concave portion 33x.

Specifically, as shown in FIG.
The concave portion 32x of the inner heat insulating material 32 is
2 (smaller radius of curvature), and the concave portion 33x of the outer heat insulating material 33 is formed with the bulging portion 3 of the inner heat insulating material 32.
2y, between the outer surface of the bulging portion 122 of the unit plate 11 and the inner surface of the concave portion 32x of the inner heat insulating material 32, and between the outer surface of the bulging portion 32y of the inner heat insulating material 32 and the outer heat insulating material 33.
It is preferable to form a certain gap S between the inner surface of the concave portion 33x and the inner surface of the concave portion 33x. Similarly, as shown in FIG. 12C, the recess 32x of the inner heat insulating material 32 is formed to be larger than the bulge 122 of the unit plate 11, and the bulge 12x of the unit plate 11 is formed.
12 and the inner surface of the concave portion 32x of the inner heat insulating material 32, a certain gap S is formed, or as shown in FIG. 12D, the concave portion 33x of the outer heat insulating material 33 is 32 is formed larger than the bulging portion 32y, so that a constant gap S is formed between the outer surface of the bulging portion 32y of the inner heat insulating material 32 and the inner surface of the concave portion 33x of the outer heat insulating material 33. Good.

As described above, the recess 32x of the inner heat insulating material 32
And the concave portion 33x of the outer heat insulating material 33 with the bulging portion 1 of the unit plate 11
By being formed larger than 22, even if the swelling portion 122 of the unit plate 11 swells outward or returns to its original position with a change in the liquid level over a long period of time, the inner heat insulating material 32, An unreasonable force does not act on the outer heat insulating material 33 and the exterior plate 34, and it is possible to reliably prevent them from being deformed or damaged.

The gap S in this case is formed between the outer surface of the bulging portion 122 of the unit plate 11 and the inner surface of the concave portion 32x of the inner heat insulating material 32 and / or the outer surface of the central portion of the inner heat insulating material 32 and the outer surface. Although formed between the inner surface of the concave portion 33x of the heat insulating material 33 and at least the peripheral portions of the heat insulating materials 32 and 33 and the outer plate 34, the gap S formed at the center communicates with the outside air. It does not enter the state and does not lower the heat insulation performance.

Further, by forming the concave portion 32x of the inner heat insulating material 32 to be larger than the bulging portion 122 of the unit plate 11, the bulging portion 122 of the unit plate 11 has a complicated shape. However, it will fall into a simple shape formed in the heat insulating material 32, for example, the spherical concave portion 32x. Therefore, the mold for molding the heat insulating material 32 is simplified, the mold can be manufactured at low cost, and the heat insulating materials 32 and 33 can be manufactured using the same mold. In addition, since it is not necessary to fit tightly into the bulging portion 122 having a complicated shape and pattern of the unit plate 11, workability at the time of assembling is improved, and the heat retaining structure can be formed in a short time and at low cost. .

In FIG. 12D, the unit plate 1
1 shows a case where a plate material 37 made of a heat-resistant material that can withstand a high temperature of 80 to 100 ° C. is attached to the outer surface of No. 1. When the plate 37 made of such a heat-resistant material is provided, the temperature transmitted to the inner heat insulating material 32 is reduced. In this case, the plate member 37 needs to follow the rise and fall of the liquid level in the liquid storage tank T and the deformation of the bulging portion 122 of the unit plate 11. As a material of the plate material 37 made of such a heat-resistant material, for example, after melting a silica-alumina-based material in an electric furnace,
Among the ceramic fibers fiberized by high-speed compressed air or centrifugal force, “Fineflex 1300 Soft Board TOMBO No.
5111 (manufactured by Nichias), glass fibers such as glass cloth and glass wool mat, rock wool heat insulating material (asbestos cloth), and ceramic fiber textiles "ceramic fiber cloth Ibi-wool cloth CH-T" (manufactured by Ibiden) Can be.

On the other hand, in the case of manufacturing the exterior plate 34 having the bulging portion 34y from a metal plate such as a stainless steel plate or an aluminum plate, if the peripheral stripe 343 is formed on the peripheral edge of the substrate 342 in advance, the unit plate 11 As described in the manufacturing process, the peripheral portion of the substrate 342 of the exterior plate 34 and the folded portion 3
There is no sinking or wrinkles caused by the 41 being dragged, or the whole being warped, twisted, or deformed.
It has a beautiful appearance (see FIG. 13). Therefore, it is preferable to form a circumferential ridge 343 protruding outward or inward also on the peripheral edge of the substrate 342 of the exterior plate 34. In this case, the heat insulating material 32 corresponds to the peripheral ridge 343 formed on the peripheral portion of the substrate 342 of the exterior plate 34 and the peripheral ridge 121 formed on the peripheral portion of the substrate 12 of the unit plate 11. , 3
It is preferable to form a circumferential groove also in 3. For example, FIG.
As shown in (a), when circumferential ridges 343 and 121 protruding inward are formed on the peripheral edge of the substrate 342 of the exterior plate 34 and the peripheral edge of the substrate 12 of the unit plate 11, respectively, at least the outer heat insulation. On the outer peripheral side of the material 33,
Peripheral groove 3 capable of storing peripheral streak 343 of exterior plate 34
31 must be formed. However, as mentioned above,
In the case where the heat insulating materials 32 and 33 are formed by the same mold, the peripheral groove 321 is also provided on the outer peripheral side of the inner heat insulating material 32.
Is formed. Similarly, as shown in FIG. 13B, peripheral grooves 343, 1 protruding outward are respectively formed on the peripheral portion of the substrate 342 of the exterior plate 34 and the peripheral portion of the substrate 12 of the unit plate 11.
In the case where 21 is formed, it is necessary to form a peripheral groove 321 at least in the peripheral portion on the inner surface side of the inner heat insulating material 32, which can accommodate the peripheral streak 121 of the substrate 12.
Also in this case, a peripheral groove 331 may be formed in the peripheral portion on the inner surface side of the outer heat insulating material 33. In addition, as shown in FIG. 13C, when the outer rim 121 that protrudes outward is formed only on the peripheral edge of the substrate 12 of the unit plate 11, at least the peripheral edge on the inner surface side of the inner heat insulating material 32. First, the peripheral strip 1 of the substrate 12
A peripheral groove 321 capable of accommodating 21 is formed.

Having such peripheral grooves 321 and 331,
Alternatively, to form the heat insulating materials 32 and 33 without the circumferential groove,
A molding die 40 as shown in FIGS. 13D and 13E may be used. Specifically, the molding die 40 includes the heat insulating materials 32 and 3.
The first die 41 formed in a shape corresponding to the inner surface shape of No. 3
And a second mold 43 which is detachably fixed to the first mold 41 via an eyebolt 42 and is formed in a shape corresponding to the outer shape of the heat insulating materials 32 and 33.
, A block material 4 for forming the circumferential grooves 321 and 331
4 is detachably fixed via bolts. Therefore, the circumferential grooves 321, 33 are formed in the heat insulating materials 32, 33.
1 is formed, the block member 44 is fixed (FIG. 13).
(See (d).) On the other hand, the circumferential grooves 321 and
If it is not necessary to form the 331, the bolt may be loosened to remove the block member 44, and the bolt mounting hole may be closed with a seal tape 45 or the like.

In this case, the case where the circumferential grooves 321 and 331 are formed on the inner surface side of the heat insulating materials 32 and 33 has been exemplified. However, in order to form the circumferential grooves 321 and 331 on the outer surface side, the second mold 43 needs to be formed. What is necessary is just to fix the block material 44 detachably.

The heat insulating material 3 using such a molding die 40
For molding 2,33, a usual molding method such as a two-liquid mixing method or a bead foaming method is employed. For example, in order to form the heat insulating materials 32 and 33 made of heat-resistant foam polystyrene or foam polystyrene, the respective raw materials are put into the first mold 41, and then the second mold 43 is placed on the first mold 41 and the eyebolt 42 is used. When fixing, foaming and molding are completed, the eyebolts 42 are loosened, the second mold 43 is removed, and the molded bodies (heat insulating materials 32 and 33) may be taken out.

When the heat insulating materials 32 and 33 are formed in this way, as shown in FIG. 14, the heat insulating materials 32 and 33 are stacked on the unit plates 11 forming the side walls Ta and the ceiling wall Tc, and furthermore, the outer plates 34 are formed.
, And fixed via a screw rod 311, a holding plate (for example, a washer) 313 and a nut 312 which constitute the locking member 31.

In the above embodiment, the case where liquid, particularly drinking water, is stored in the liquid storage tank T has been described. However, water other than drinking water, chemicals, and the like may be stored in the liquid storage tank T. ,
It does not limit the storage target.

[0092]

As described above, according to the first aspect of the present invention, since the heat insulating material is not integrally fixed to the unit plates in advance, the joining edges of the adjacent unit plates are sequentially welded to the side walls and the ceiling. When the walls are formed and these side walls and the ceiling wall are welded together on the bottom wall to form the liquid storage tank, there is no danger of melting, burning or burning the heat insulating material due to the heat of welding. . Therefore, the assembling work of the liquid storage tank by welding can be efficiently performed without being bothered by the heat insulating material. In addition, after the assembly work of the liquid storage tank by welding is completed, the installation of the heat insulating material may be performed at once, so not only the work time of the heat insulating material installation is shortened, but also the heat insulating material is damaged or melted, Finishes beautifully without burning. In addition, the inner heat insulating material and the outer heat insulating material having the same size are manufactured in advance, and if necessary, the heat insulating material can be attached to an arbitrary unit plate on the ceiling wall, the upper side wall, and the lower side wall of the storage tank. it can. As a result, since the inner heat insulating material and the outer heat insulating material can be standardized to have substantially the same size as the outer surface of the unit plate and can be mass-produced, the production efficiency is good and the inventory management is easy. . In addition, if necessary, the exterior plate, the outer heat insulating material and the inner heat insulating material attached to the outside of each unit plate can be easily removed for maintenance and inspection.

Further, an inner heat insulating material having a high heat resistant temperature is attached to the outer surface of the unit plate, and an outer heat insulating material having a low heat resistant temperature and having self-extinguishing properties is attached to the outer surface of the inner heat insulating material. In addition to having high heat insulating performance, the cost of the whole heat insulating material can be reduced. In particular, since a self-extinguishing heat insulating material is provided on the outside, even in the event of a fire, even if the heat insulating material is temporarily burned by the fire, it does not spread and is extinguished naturally. Therefore, it is also possible to prevent the burning of other combustible materials.

Also, since the corner insulating material is provided at the corner formed by the side wall butting and the corner formed by the side wall and the ceiling wall abutting, the ridge of the liquid storage tank is provided. The heat does not escape from the space, and the heat insulating effect is improved.

According to the second aspect of the invention, in addition to the effect of the first aspect, it is possible to prevent the bulging portion of the unit plate from expanding or returning to the original position with a change in the liquid level. Even if it is repeated over a long period of time, there is a gap at the center between the unit plate and the inner heat insulator and / or at the center between the inner heat insulator and the outer heat insulator. An excessive force does not act on the heat insulating material and the exterior plate, and it is possible to reliably prevent the heat insulating material and the exterior plate from being deformed or damaged.

According to the third aspect of the present invention, the temperature transmitted to the inner heat insulating material is reduced. Therefore, in the liquid storage tank,
Higher temperature liquids can be stored.

According to the fourth aspect of the present invention, when forming the bulging portion on the substrate of the unit plate, or when forming the bulging portion on the substrate of the exterior plate, the peripheral edge, the joining edge, or the folded portion thereof are formed. There is no sinking or wrinkling due to the part being dragged, and the whole does not warp, twist, or deform,
It can be formed into a beautiful appearance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a heat retaining structure of a prefabricated stainless steel storage tank of the present invention.

FIG. 2 is an explanatory view schematically showing one manufacturing process of a unit plate made of a stainless steel plate.

FIG. 3 is a plan view (development view of another unit plate) showing a state immediately before a step of forming a bulge portion on a substrate and bending a joining edge in a manufacturing process of another unit plate made of a stainless steel plate. is there.

FIG. 4 is a perspective view illustrating a step of manufacturing another unit plate from the plate material illustrated in FIG. 3;

FIG. 5 is a plan view showing another unit plate, a front view, a cross-sectional view taken along line AA of the plan view, and a plan view showing a state immediately before a bending step of a joining edge.

FIG. 6 is a perspective view, partially cut away, showing an example of an assembled stainless steel storage tank assembled by unit plates made of stainless steel plates.

FIG. 7 is a cross-sectional view showing a modification of one embodiment of the heat retaining structure of the liquid storage tank according to the present invention, with a part thereof being omitted.

FIG. 8 is a partial sectional view showing a modification of the locking member.

FIG. 9 is a partial sectional view showing another modification of the locking member.

FIG. 10 is a partial sectional view showing another modified example of the locking member together with another corner heat insulating material and a corner armor plate.

FIG. 11 is a longitudinal sectional view partially showing another modified example of the embodiment of the heat retaining structure of the assembled liquid storage tank of the present invention.

FIG. 12 is a sectional view showing another embodiment of the heat retaining structure of the assembly type liquid storage tank of the present invention.

FIG. 13 is a partial cross-sectional view showing the relationship between the unit heat-insulating material and the outer heat-insulating material having the circumferential groove formed therein, and the unit plate having the circumferential streaks and the circumferential groove formed therein. FIG. 2 is a partial cross-sectional view showing a relationship with the inner heat insulating material, and a cross-sectional view illustrating a case where a heat insulating material having a circumferential groove or a heat insulating material without a circumferential groove is molded by a common mold.

FIG. 14 is an exploded perspective view showing a heat retaining structure composed of a unit plate, an inner heat insulating material, an outer heat insulating material, and an outer plate corresponding to FIG.

FIG. 15 is a perspective view showing an example of a conventional assembling-type liquid storage tank with a part thereof omitted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Unit plate 12 Substrate 121 Perimeter line 122 Swelling part 13, 13A Joining edge 20 Manufacturing apparatus 21 Lower mold 22 Upper mold 23 Middle mold 31 Locking member 32 Inner heat insulator 32x recess 32y Swelling part 321 Peripheral groove 33 Outer heat insulation Material 33x recess 33y bulge 331 peripheral groove 34 exterior plate 34x recess 34y bulge 342 substrate 343 peripheral ridge 35 corner heat insulator 36 corner exterior plate 37 plate material made of heat resistant material S gap T storage tank Ta side wall Tb bottom wall Tc ceiling wall

Claims (4)

[Claims] 1. A right-angled quadrilateral substrate having a bulging portion formed substantially at a central portion, and a side opposite to a bulging direction of the bulging portion continuously on two, three or four orthogonal sides of the substrate. With a plurality of joining edges bent into, the butting portions of the adjacent joining edges are directed to the same side of the plurality of stainless steel unit plates welded, and the adjacent joining edges are joined together. Welding to form at least the side wall and ceiling wall, the joining edge of the stainless steel unit plate forming these side wall and ceiling wall facing inward, placing the side wall and ceiling wall on the bottom wall, and welding together In the assembly type liquid storage tank formed by performing the above, a locking member is provided on the outer surface of the unit plate, has a concave portion substantially corresponding to the bulging portion of the unit plate, and has a size substantially the same as the size of the unit plate. Formed inner insulation with high heat-resistant temperature and resistance The outer heat insulating material having a low temperature and self-extinguishing properties is stacked outside the unit plate in this order, and the outer plate is brought into contact with the outer surface of the outer heat insulating material, and the outer plate is attached to the inner heat insulating material and the outer heat insulating material. The heat insulating material is fixed together with the locking member via a locking member, and a corner heat insulating material is arranged at a corner formed at a butt portion between the side walls and a corner formed at a butt portion between the side wall and the ceiling wall. A heat retaining structure for a prefabricated stainless steel storage tank, characterized in that an exterior plate is disposed outside the heat insulating material. 2. A rectangular quadrangular substrate having a bulging portion formed substantially at a central portion thereof, and a side opposite to the bulging direction of the bulging portion continuously on two, three, or four orthogonal sides of the substrate. With a plurality of joining edges bent into, the butting portions of the adjacent joining edges are directed to the same side of the plurality of stainless steel unit plates welded, and the adjacent joining edges are joined together. Welding to form at least the side wall and the ceiling wall, the joining edge of the stainless steel unit plate forming the side wall and the ceiling wall is directed inward, and the side wall and the ceiling wall are placed on the bottom wall to form a body. In the assembly type liquid storage tank formed by welding, a locking member is provided on the outer surface of the unit plate, and has a concave portion substantially corresponding to a bulging portion of the unit plate, and has a size substantially the same as the size of the unit plate. Inner insulation material with high heat resistance temperature formed on Outer heat insulating materials having a low temperature and having self-extinguishing properties are stacked in this order on the outer side of the unit plate, and the central portion between the unit plate and the inner heat insulating material and / or the inner heat insulating material and the outer heat insulating material are stacked. A gap is provided at the center between the heat insulating materials, the outer plate is brought into contact with the outer surface of the outer heat insulating material, and the outer plate is fixed together with the inner heat insulating material and the outer heat insulating material via a locking member, In addition, a corner heat insulating material was disposed at each of a corner formed at a butt portion between the side walls and a corner portion formed at a butt portion between the side wall and the ceiling wall, and an exterior plate was disposed outside the corner heat insulating material. A heat retaining structure for a prefabricated stainless steel storage tank characterized by the following. 3. The prefabricated stainless steel liquid storage device according to claim 1, wherein a heat retaining member made of a heat-resistant material is provided over the entire outer surface of the unit plate so as to directly contact the unit plate. Tank insulation structure. 4. A rim is formed near the periphery of the substrate of the unit plate and / or near the periphery of the exterior plate, and the rim can be stored near the periphery of the inner heat insulator and / or the outer heat insulator. 4. The heat retaining structure of a prefabricated stainless steel storage tank according to claim 1, wherein a peripheral groove is formed.