JP2000177790A - Tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make assembly on and welding at an installation site easy and to contrive the enlargement in size of a tank being low in the height while making the structure simple and enhancing the strength by a method wherein flat parts at both side edges of a side plate piece curved in one direction in a circular arc shape are superposed on square tube faces of supports and joined by fillet welding to form a side plate. SOLUTION: A bottom plate 1 of a tank is formed of a flat board which is made up by joining an anticorrosive steel sheet to a base, and supports 2 each made up of anticorrosive steel material in a square tube-like shape in a closed sectional shape are erected along the outer circumference of the bottom plate. A side plate piece 4 forming a side plate 3 is fixed by fillet welding between the supports 2. The side plate piece 4 is formed in a shape wherein an anticorrosive steel material is curved in one direction at its center in a circular arc shape with straight flat parts provided at both of its side edges. The side plate piece 4 is joined at its lower end by fillet welding to the outer periphery of the bottom plate 1 while the flat parts thereof the superposed respectively on the square tube faces of the supports 2 and joined by fillet welding. Furthermore, a joining member 5 is attached to each of the supports 2 connecting the side plate pieces 4, and a connecting member 6 is arranged linearly between the joining members 5 for fixation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage tank for storing liquids such as water and petroleum, and a tank such as a silo for storing powders such as grains and coal.

[0002]

2. Description of the Related Art A storage tank which is installed in a tap water distribution point, an oil complex, or the like and stores liquid at normal temperature and pressure is, for example, a flat-bottomed cylindrical tank formed by butt welding and joining steel plates, or a peripheral tank. Tanks assembled by connecting panel bodies provided with bolt and nut coupling flanges are used, and silos installed in food factories and the like to store powdery granules are tanks with a single flat-bottomed cylindrical body and It is formed of a tank of a group tank formed by connecting a plurality of flat-bottomed cylindrical bodies.

[0003] Each of the side plates serving as the side walls of these tanks is generally formed in a cylindrical shape that can be made at a low cost with a relatively small amount of material and that is strong against the storage pressure of the stored material. The side plate pieces constituting the side plate are, for example, butt-weld type side plate pieces (not shown) divided longitudinally across the cylinder in the circumferential direction or Japanese Utility Model Laid-Open No. 61-25451 shown in FIG. The described side plate piece 14 of the screw connection type panel structure or the patent No. 25 shown in FIG.
For example, a side plate piece 24 in the form of a welded semi-cylindrical shell described in Japanese Patent No. 11373 is used. This patent No. 2511
The side plate piece 24 described in Japanese Patent No. 373 is fixed by butt welding to the arc-shaped side surfaces of the column 22 formed by cylindrical hollow pipes on both side edges.

[Problems to be solved by the invention]

The side plate composed of the butt-weld type side plate, not shown, is relatively easy to manufacture the side plate at the factory and has a structure suitable for enlarging the tank. It requires skilled workers who are skilled in work, butt welding work, weld inspection work, etc. In addition, on-site installation also requires a lot of labor and a long construction period.

[0005] In contrast, the side plate formed by connecting the side plate pieces 14 of the above-mentioned screw connection type panel structure is a structure that is fastened and connected by bolts and nuts. Although it is possible to reduce the size of the tank, it takes a lot of time and effort to manufacture the side plate pieces 14 at the factory, and it is difficult to increase the size of the tank due to the strength of the screw connection portion.

The side plate composed of the welding-bonded semi-cylindrical shell-shaped side plate piece 24 can construct a high-quality tank on site in a short period of time due to significant prefabrication in a factory. Due to the problem of transport strength that accompanies the increase in the size of the tank, it requires a lot of reinforcing materials for transport, and it is difficult to increase the size of the tank. Because of the structure in which the pieces 24 are welded and fixed, the joining between the arc-shaped surface of the column 22 and the edge of the side plate piece 24 requires an advanced joining technique, and much more work is required for the joining setup work. There remains a problem to be solved, such as difficulty in forming a groove for butt welding, welding and inspection of a weld.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a simple structure and a strong structure. To provide a tank suitable for

[0008]

A tank according to the present invention comprises: a bottom plate formed of a flat plate; a rectangular columnar support standing upright on the outer periphery of the bottom plate with a space between the bottom plate; And a side plate that is erected by connecting the parts, and a side plate piece constituting the side plate has a central portion of the side plate piece curved in a one-way arc shape, and a straight line is formed on both curved side edges of the central portion. The flat portion of the side plate piece is formed by overlapping with the rectangular cylindrical surface of the above-mentioned column and welded and joined by fillet welding.

In addition, a tank is formed by disposing a connecting member formed of a shape steel or the like between the columns.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Details of a tank according to the present invention will be described with reference to the drawings showing an example of the embodiment. FIG. 1 is a perspective explanatory view showing an embodiment of a water tank as a tank according to the present invention, in which an upper roof portion is cut out and partially omitted, and FIG. 2 is a water tank shown in FIG. It is sectional explanatory drawing which expands and shows the connection part of the side plate piece of a tank, and a support | pillar. 2A is an explanatory diagram of a case of a rectangular column having a substantially pentagonal cross section, and FIG. 2B is an explanatory diagram of a case of a rectangular column having a substantially rectangular cross section. The water tank of this embodiment is an example of a water tank that stores tap water containing chlorine as a corrosive gas.

First, a bottom plate 1 serving as a bottom wall of a tank is formed by a flat plate material formed by arranging thin steel materials such as stainless steel having corrosion resistance on a base or base (not shown) and welding them together. Then, the pillars 2 formed in the shape of a rectangular tube are erected along the outer periphery of the bottom plate 1 at spaced intervals as shown in FIG.

The support 2 is made of a corrosion-resistant steel material such as stainless steel and has a polygonal shape such as a substantially pentagonal, substantially square, or other substantially triangular or substantially hexagonal closed section as shown in FIG. To form a square tube having a closed cross-sectional shape with high strength. However, in a case where the size of the tank is small or the like, although not shown in the drawings, an L-shaped cross section such as an angle material, a U-shaped cross section such as a channel material, a T-shaped cross section, or a Y-shaped cross section is used. If the column 2 is formed in a rectangular tube-like shape having a cross-sectional shape that does not block like a shaped steel material and the like, and a flat surface of a side plate piece 4 constituting a side plate 3 described later having a flat surface that can be overlapped and joined. , Its support 2
Is easier to manufacture.

Further, the column 2 erected along the outer periphery of the bottom plate 1 with a separation interval may have a structure in which the lower end is erected directly on the outer peripheral edge of the bottom plate 1 as shown in FIG. It is easy to secure sealing properties such as liquid tightness and air tightness. If the lower end is directly fixed to the foundation or base outside the bottom plate 1 (not shown), the upright supporting column 2 is strong. Easy to secure strength.

Between the columns 2, 2, 2,... Erected along the outer periphery of the bottom plate 1 at a distance from each other, a side plate piece 4 constituting a side plate 3 serving as a side wall as shown in FIG. Welding bonding is performed by meat welding 7.

The side plate piece 4 is formed of a corrosion-resistant steel material such as stainless steel into a shape as shown in the drawing, that is, a shape having straight flat portions on both side edges of a central portion curved in one direction in an arc shape. I do. The straight flat portion has a flat portion shape at an angle that can be easily superimposed on the straight rectangular cylindrical surface of the column 2. In addition, the curvature of the curved central arc that is strong against the water storage pressure is determined by the strength of the tank based on the capacity of the tank, that is, the size, the interval between the columns 2, the thickness of the side plate pieces 4, and the like. Is determined based on the examination of

The side plate piece 4 formed in this manner is welded to the outer peripheral edge of the bottom plate 1 by welding the lower end thereof by fillet welding, and the flat portion of the side plate piece 4 is superimposed on the rectangular cylindrical surface of the column 2 as shown in FIG.
As shown in FIG. FIG. 2 (a)
As in the case, when the flat portion of the side plate piece 4 is overlapped with the rectangular cylindrical surface of the column 2 and welded and joined to substantially match the tangent shape of the circular arc end portion of the side plate piece 4, the side plate 3 generated by the water storage pressure is formed. Since the side plate 4 has a structure suitable for receiving the hoop force by swelling and deforming, the thickness of the side plate 4 can be reduced.

In the case where a flat portion extending in a bent shape from the end of the circular arc at the center of the side plate piece 4 is overlapped and joined to the rectangular cylindrical surface of the column 2 as in the case of FIG. Since the flat portion deforming frictional force of the column overlapping portion of the column is added to the coupling force of the fillet welding, the coupling force between the side plate piece 4 and the column 2 can be increased.

Each of the columns 2 to which the side plate pieces 4 are connected,
Attach the engaging members 5 to 2, 2,..., And place a connecting member 6 formed of a wire, a shape steel or the like in a straight line between the attached engaging members 5 and fix them by welding or bolt nuts. Then, the connecting member 6 is disposed between the columns 2, 2, 2,....

The arrangement of the connecting member 6 is for securely holding the column 2 and the side plate piece 4 connected to the column 2 with which the stored water load is to be pushed and spread at the time of storing the water, and for restraining and supporting the column. Depending on the size of the tank, the number of tanks may be omitted or may be increased or decreased such that one stage provided in a lattice shape as shown is provided in a plurality of stages above and below. It is preferable that the engaging members 5 are attached to the columns 2 at the time of manufacturing the columns 2 from the viewpoint of workability.

Then, connecting members 6, 6, 6,.
After the installation, a water tank is completed by providing a roof consisting of a roof plate and the like on top of the tank (not shown) and attaching accessories such as water access pipes.

By the way, in the embodiment of FIG.
An example of a water tank in which a side plate piece 4 is arranged at a corner of a corner, and a support column 2 is arranged so as to be separated from each other in a substantially rectangular shape in a plane and formed in a substantially rectangular parallelepiped shape. However, the column 2, 2, 2,... Shown in FIG. 1 arranged in a substantially rectangular shape in a plane and separated from each other in a circular shape is formed in a circular cross-sectional flower shape (not shown. The height is low. (A shape suitable for a large tank having a large flat surface), or a circular cylindrical shape (not shown) formed by connecting four side plates 4 divided by four columns 2 (the illustration is omitted. (A shape suitable for a tall tank) can be formed. Therefore, the shape is appropriately determined according to the capacity of the tank or the shape of the site of the tank.
When the connecting member 6 is installed, it is a tank more suitable for enlarging a tank having a relatively low height from the viewpoint of workability.

[0022]

In the tank according to the present invention, the straight flat portions of both side edges of the side plate curved in a one-way circular arc are overlapped on the rectangular cylindrical surface of the support column and welded by fillet welding which facilitates welding work. Since the side plates are formed in this manner, the assembling work and the welding work at the installation site are easy, and the tank structure is simple and strong, and the tank is suitable for enlarging a tank having a relatively low height.

Further, in the tank in which the connecting member is disposed between the columns, the connecting member can share and support the load generated from the storage material, so that the tank strength is higher and the height is relatively low. The tank structure is more suitable for larger tanks.

[0024]

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing an embodiment of a tank according to the present invention, in which an upper roof portion is cut out and a part is omitted.

FIG. 2 is an enlarged cross-sectional explanatory view showing an example of a joint portion between a side plate piece and a support of the tank shown in FIG. 1, and FIG. 2 (a) is an explanatory view of a case of a rectangular cylindrical support having a substantially pentagonal cross section. (B) is an explanatory diagram of a case of a rectangular column having a substantially rectangular cross section.

FIG. 3 is an explanatory perspective view showing a side plate used in a conventional tank having a screw connection panel structure.

FIG. 4 is an explanatory perspective view of a conventional tank provided with a side plate composed of a welding-bonded semi-cylindrical shell-shaped side plate.

[Description of Signs] 1 Bottom plate 2,22 Support 3 Side plate 4,14,24 Side plate piece 5 Engaging material 6 Connecting material 7 Fillet welding

Claims (2)

[Claims] 1. A bottom plate formed of a flat plate material, a rectangular tubular column standing on the outer periphery of the bottom plate with a space between the bottom plate, and a side plate standing upright by connecting a lower end to an outer peripheral edge of the bottom plate. The side plate piece constituting the side plate is formed in a shape in which a central portion of the side plate piece is curved in a one-way arc shape and straight flat portions are provided on both curved side edges of the central portion, and A tank characterized in that a flat portion of a side plate piece is overlapped on a rectangular cylindrical surface of the above-mentioned column and welded and joined by fillet welding. 2. The tank according to claim 1, wherein a connecting member formed of a shape steel or the like is provided between the columns.