JPH0116754B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is a cage-shaped storage tank made of polygonal steel that is more convenient than ever in terms of design, construction (processing), and maintenance. The stored materials that can be stored in this storage tank include, for example, all kinds of granular materials such as raw materials for steel making such as coal, coke, lime, pellets, and iron ore, and grains such as rice and wheat.

The present invention relates to a cage-shaped storage tank made of polygonal steel suitable for storing any of the powders mentioned above.

(Prior Art) Conventional storage tanks have a circular cross-sectional shape as shown in FIG. 1 and a rectangular (including polygonal) shape as shown in FIG. 2. Structurally, it has a ring girder 1 in the center, a vertical wall 2', and an inclined wall 2. Furthermore, the stress of the rectangular shape is treated with reinforcing material 3 and hanging material 4.

In terms of design, the circular shape allows stress acting on the tank wall to be handled by hoop tensions, making it easier to analyze the structure. For square shapes (including polygons), there are no hoop tensions designed, and stress is handled by bending the reinforcing material 3 and tensioning the hanging material 4. Therefore, in structural analysis, all of these reinforcing materials and hanging materials are verification is required, which is very troublesome.

In construction, the circular shape requires bending, and as shown in FIG. 3, there is a very large loss 6 when extracting the tank wall material 5 from a predetermined steel plate. In addition, it is also difficult to fit the plates together, especially on the inclined wall 2. Square shapes do not have the same problems as circular shapes, but they require a large number of pieces and require a lot of effort, and they usually require a larger amount of steel than circular shapes of the same capacity and scale.

In addition, for both circular and square shapes, if there is a risk of wear due to the contents (wear when the charged material falls into the tank and wear when the stored materials fluctuate within the tank), use a self-lining method or use a separate method. Tank walls (structural materials) have been protected by providing lining materials (secondary members). In other words, although it is economical to use both structural members and secondary members, it has not been done.

From a maintenance perspective, conventionally welding was used, so the lining material and tank wall were integrated.
It was not easy to replace the lining material or make local repairs to the tank wall.

(Object of the Invention) The object of the present invention is to solve these problems and provide a polygonal steel basket type suitable for storing all kinds of powder and granular materials, which is rational and economical and has been explained in the field of industrial application. The purpose is to provide a storage tank.

(Structure and operation of the invention) The present invention provides a steel cage-type storage tank in which the ring girder 10 is formed into a polygon of pentagon or more, and the pillars 9
The upper frame 8 and the plurality of tank walls 7 are connected to a ring garter 10.
Attach it to the top of the upper frame and use it as a hanging material 11
A lower frame 12 and a plurality of tank walls 7' are attached to the lower part of a ring girder 10 to form a lower frame, and the ring girder and the frame and the frames are joined with bolts 14 and nuts 15, and the bolts 14 are covered with a cover 13. This is a cage-shaped storage tank made of polygonal steel.

In order to achieve the above purpose, this storage tank is equipped with CT
It has a polygonal frame structure with pillars 9 made of shaped steel etc.
By attaching the tank wall with bolts, structurally,
It can be assumed that the column 9 made of CT section steel and the tank walls 7, 7' are connected by pins. Therefore, considering deformation (bulge), it approximates a circular shape, and although it is a rectangular shape, it can be processed by hoop tension in terms of stress analysis. Also,
By freely replacing the tank wall, tank wall replacement and local repairs can be easily handled in terms of maintenance.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 4, a ring girder 10 is installed to constitute the framework of this tank and to transmit loads. As shown in FIG. 6, eight upper frame columns 9 and a plurality of tank walls 7 are built into this ring girder as an upper frame to form an upper tank. Further, as a lower frame, hanging members 11 and a plurality of tank walls 7 are suspended from the lower frame to form a lower tank.

As shown in FIG. 5, a tank body is formed by attaching a tank wall 7 (also used as a lining material) with bolts in advance, and functions as a tank.

At this time, a bolt cover 13 is attached to protect the bolt head from wear.

(Effects of the Invention) According to the present invention, it is suitable for storing all of the above-mentioned powder and granular materials, and has the following effects.

1. Although it is a square shape, if deformation is taken into account, stress can be handled by hoop tension in the same way as for a circular shape, which improves the ease of structural analysis.

2. Replacement or local repair of tank walls can be easily handled by simply replacing the steel plate in the damaged area, simplifying maintenance.

3. There is no need for circular bending, so there is no loss of steel plates, and there is no need to attach reinforcing materials like square ones, so the processing is as simple as general steel frame processing.

4. Ground assembly on site can be omitted, difficulty in joining boards can be eliminated, and the construction period can be shortened.

5 As shown in FIG. 5, the bolt 14 provided at the joint between the tank walls 7 and 7 is covered with the bolt cover 13, so the head of the bolt 14 is covered with the bolt cover 13.
This not only protects the frame from abrasion, strengthens the frame joint, and increases durability.
Since the head of the bolt 4 does not protrude into the tank, there is an effect that the contents stored in the tank will not be damaged by the bolt 14.

[Brief explanation of drawings]

Fig. 1 a, b and Fig. 2 a, b are plan and front views of conventional circular and square storage tanks, Fig. 3 is a plan view of a circular storage tank, and Fig. 4 is a polygonal steel cage type. A conceptual perspective view of the storage tank, Figure 5 is a tank wall installation procedure diagram,
FIG. 6 is a detailed view of the ring girder section. 1... Ring girder for conventional circular/square storage tanks, 2... Inclined wall, 2'... Vertical wall, 3... Reinforcement material, 4... Hanging material, 5... Material, 6... Loss, 7
...Tank wall (also used as lining material), 8...Top frame,
9... Pillar, 10... Ring girder, 11... Hanging material, 12... Lower frame, 13... Bolt cover,
14...Bolt, 15...Natsuto.

Claims (1)

[Claims] 1 In a steel cage-type storage tank, the ring girder is formed into a polygon of pentagon or more, the columns, the upper frame, and multiple tank walls are attached to the top of the ring girder to form the upper frame, and the hanging material, the lower frame, and multiple tank walls are attached to the top of the ring girder. A cage-shaped storage tank made of polygonal steel, characterized in that a tank wall is attached to the lower part of a ring girder to form a lower frame, the ring girder and the frame are joined together with bolts, and the bolts are covered with a cover.