JPS6058108B2 - Double hull water tank roof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-hull type water storage tank roof having a double structure.

Conventionally, the structure of a water storage tank is shown in FIG. 1, in which a tank side plate 1 is erected around a tank bottom plate 2 placed on a foundation 3, and a frame member 6 is attached to an annular top reinforcing beam 7 placed on the top of the side plate.
A tank roof 4 made of a single plate reinforced with is installed and supported by pillars 5 erected inside the tank.

As shown in FIG. 2, the reinforcing frame members are arranged in plural pieces radially from the center of the roof. The above-mentioned frame members are constructed by a channel steel 6a as shown in FIG. 3, an H-shaped steel 6b as shown in FIG. 4, a trough assembly using a shaped steel 6c as shown in FIG. 5, and a shaped steel 6d as shown in FIG. Although they are constructed with reinforcing ribs, both have the following drawbacks. In other words, there are many areas that are prone to rusting later on even if a careful coating is applied, such as the corners and ends of shaped steel, cassette plates, and bolts, as well as the contact surfaces between cassette plates and shaped steel, and in the case of trough assembly. In this case, there are always areas where surface treatment, painting, etc. cannot be performed on the surfaces between the steel molds, as shown by the symbol a in Figure 5, and there are also unevenness on the entire inner surface of the roof, which requires surface treatment, painting, etc. It is difficult to carry out painting, etc., and the construction period becomes longer due to the increased painting area. Furthermore, in FIG. 7, if the roof plate 4 is configured with a lap joint, a step will be created between it and the frame member 6, which will cause rust. If they are not bonded, they will be more likely to rust, but this inner welding work is difficult, and there are many other problems.

This invention was made in view of the current situation, and an object of the present invention is to provide a double-hull type water storage tank roof that eliminates the drawbacks of the prior art by installing roof plates on both the upper and lower surfaces of the frame material. As/are.

Next, to explain the drawings showing an embodiment of the present invention, in FIG. 8, a frame member 6a made of channel steel is arranged radially from the center of the roof, a roof plate 4 is placed on the upper surface of the frame member 6a, and a lining plate is placed on the lower surface of the frame member 6a. In place of the channel steel 6a of the framework material, an angle steel 6d shown in FIG. 9 is used.
, the trough may be assembled using the steel type 6c shown in FIG. 10,
Furthermore, the connection between the top reinforcing beam of the tank side plate 1 and the end of the roof structure according to the present invention is shown in FIG. 6
The abdomen and the reinforcing beam 7 are connected via a cassette plate 9,
The lining board 8 is joined by stretching its ends, and if the cassette board 9 is large as shown in FIG. Bye.

Furthermore, in Figures 13a and 13b, the overlapping structure in which the roof plate 4 and the lining plate 8 are joined by fillet welding only on the outside of the tank and the inside of the tank is effective when applied to a large water storage tank. . Therefore, according to the present invention, since the ceiling surface of the inner surface of the tank is configured to be smooth, painting work and management are easy, rusting accidents can be prevented, and the frame material is sealed with the lining board 8. Because it is done,
Since corrosion due to residual salt air, liquid contents, etc. is eliminated, there is no need to consider corrosion allowances, and the entire cross section can be regarded as structurally effective.Furthermore, in terms of structural strength, the roof panels 4 and lining panels 8 are made of strong materials. It is extremely advantageous from a structural point of view as it has a composite cross section that can be used as a composite cross-section.Furthermore, both the roof panels and the lining panels can be joined by lap joints by fillet welding on one side instead of conventional butt welding. This makes welding work extremely efficient.

As mentioned above, this invention not only smoothes the inner surface of the tank, but also makes painting work and management easier, reduces painting costs, shortens the construction period, and allows careful painting work, which prevents rusting later. It is expected that accidents will not occur, and since the roof has a double plate structure, there is no need to allow for corrosion in the frame materials, and since it is a composite cross-section that includes both the roof plate and the lining plate in the structural material, the strength is increased. In addition to being extremely advantageous, there is no need to allow for corrosion in the frame materials, so it is possible to use lightweight section steel to a large extent, and the structural weight can be easily reduced. There is.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional water storage tank with a part of the structure cut out, Figure 2 is a plan view of the tank roof with a part of the tank roof cut out, and Figures 3, 4, 5, and 6 are of the same structure. A sectional view showing various conventional examples at the A-A cutting position in the figure,
Fig. 7 is a longitudinal cross-sectional side view of the main part showing conventional lap joint welding;
Figures 8, 9 and 10 are partially enlarged cross-sectional views of the engagement with the roof plate, the framing member and the lining plate, respectively, showing separate embodiments of the present invention, and Figures 11 and 12 are the top reinforcing beams of the same tank side plate. Partially enlarged longitudinal sectional side view showing the engagement of the parts, No. 13a
The figure is a partially enlarged longitudinal sectional side view showing the lap joint joint of the roof plate and the lining plate, and FIG. 13b is a sectional view taken along the line B-B of the previous figure. 1... Tank side plate, 2... Tank bottom plate, 3... Tank foundation, 4... Tank roof plate, 5... Support column, 6・・・・・・Frame material, 7.
...Top reinforcement beam, 8...Inner lining board, 8a
... Slanted lining board, 9... Cassette board.

Claims (1)

[Claims] 1. A water storage tank roof characterized by having a double-hull structure, with a roof plate placed on the top surface of aggregate that has a beam function, and a lining plate placed on the bottom surface.