JPS61152591A - Sealant for panel type built-up storage tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sealant for a panel-type assembled storage tank formed by joining together a number of unit panels made mainly of iron and having seven flange around the pressure-receiving surface.

[Conventional technology]

In recent years, large-capacity storage tanks have been installed, and as shown in FIG.
are assembled by joining them together. This flange 2.
Generally, a flat plate-shaped sealant 4 is sandwiched between the two to prevent water leakage, as shown in FIG. 5, and watertightness is maintained by bolts 5 and nuts 6. However, in unit panels 3 mainly made of iron, the flange 2 is
A rounded portion (R) is formed at the boundary between the pressure receiving surface 1 and the pressure receiving surface 1. Therefore, it is necessary to consider the effective width for tightening the sealant 4 in consideration of this amount. Further, in unit panels mainly made of iron, when the sealant 4 is sandwiched and tightened, the storage tank side of the flange 2 does not deform as shown in FIG. 6, but the edge side of the flange 2 undergoes wavy deformation. This may cause leakage and also significantly reduce the commercial value in terms of appearance.

It has been found that this is largely influenced by the relationship between the position of the bolt hole drilled in the flange 2, the bolt hole of the sealant, and the wall thickness of the sealant itself.

The present invention relates to a sealant mainly used when joining iron unit panels, and is a sealant structure that prevents leakage, prevents deformation of flanges, and eliminates sealant protrusion, and also allows for sufficient construction management. The purpose is to obtain.

[Summary of the invention]

The present invention aims to solve each of these drawbacks, and its gist is that there is no space between the flanges of a panel-type assembled storage tank that is constructed by connecting adjacent flanges to each other and forming a unit panel with flanges around the pressure receiving surface. This is a sealant for use in a tank, and includes a long flat plate portion having a width approximately equal to the effective tightening width of the flange, and a bolt hole near the storage tank of the width of the deck portion,
At least one protrusion is formed across this bolt hole, and the flat plate part closer to the storage tank than the bolt hole is made thicker than the flat plate part on the other side, and both width edges of the flat plate part are made to be thicker than the flat plate part on the other side. A storage tank sealant characterized in that the flat plate part is thicker than the flat plate part, and in a specific embodiment, the height of each protruding part is approximately the same, and the width of the protruding part closest to the storage tank is can be made larger than the width of the other protrusions.

[Embodiments of the invention]

FIG. 1 shows a first embodiment of the present invention, which includes a long flat plate portion A having a width W that is approximately equal to the effective tightening width of the flange, and this width W.
A bolt hole B is provided closer to the storage tank than the center of the tank, and one protrusion C and D are each formed across this bolt hole B.

The flat plate portion Al closer to the storage tank than the bolt hole B is thicker than the flat plate portion At on the opposite side.

Further, both edges E, E2 in the width direction of the flat plate part are each flat plate part A.
, , and l, and has a substantially triangular cross section in the figure.

FIG. 2 shows a second embodiment of the present invention, in which there are two protrusions C (C+, Ct) near the storage tank.

Figure 3 shows a third embodiment of the present invention, in which two protrusions (D
, , is a detailed example. In these cases, the flat plate part A,
The thick wall portion is defined by the space between the ridges C and C.

In each embodiment, the height of the ridges C and D is almost constant (in some cases, the shape may also be constant), and the width of the ridge C2 near the storage tank is the same as that of the other ridges C. It is preferable to make it larger than D.

Incidentally, it is also advisable to apply an adhesive (not shown) to the flat plate part A, and this adhesive is attached to the flat plate part facing the bolt hole B for the purpose of preventing displacement from the flange.

The material of the sealant is generally 30° to 80° (JIS-
Vulcanized rubber, various elastomers, soft resins, etc. in the range of A) are used, and the thickness of the flat plate portion is approximately 0.5 to 2 mm, and the thickness of the protruding portion is approximately 2 to 5 mm. Although the cross-sectional shape of this protrusion is not particularly limited, it is preferable that the protrusion has a narrow tip width, such as a semicircle or a triangle.

(Effects) The present invention mainly improves the drawbacks of iron panels, and the bolt holes of the sealant are moved slightly closer to the storage tank to keep the sealant clamping pressure relatively constant, and the sealant portions that are closer to the storage tank than the bolt holes as a whole are The thick wall prevents leakage, while the overall thickness of the sealant outside the bolt holes prevents deformation of the flange.

When the sealant is tightened with bolts and nuts, the protrusion first comes into contact with the flange, and since the width of the tip is narrow, it does not exhibit a sudden reaction force, but gradually deforms and the reaction force gradually increases. I will do it.

As the deformation of the protruding portion progresses, the flat plate portion A comes into contact with the flange. As a result, when tightening, the necessary surface pressure is sometimes obtained on the protrusion, and there is no shortage of tightening, so that sufficient preventive performance can be obtained. Also, both edges of the sealant will next come into contact with the flange, but by stopping the tightening of the bolts and nuts at this point, the degree of tightening can be controlled to a constant level, preventing the sealant from protruding due to over-tightening. This prevents wavy deformation of the flange.

[Brief explanation of the drawing]

Figures 1 to 3 are perspective views showing the sealant of the present invention, Figure 4 is an overall view of the prefabricated storage tank, and Figure 5 is an enlarged view of the flange portion of the iron panel (taken along line V-v in Figure 4). The sectional view and FIG. 6 are enlarged perspective views showing undulating deformation of the flange. A, A+, At...Flat plate part, B...Bolt hole, C, C,, C,...Storage tank protrusion, D, D,, D2
... Flange end side protrusion, E, , Ez ...
Both edges.

Claims (2)

[Claims] (1) A sealant that is used between the flanges of a panel-type assembly storage tank, which is constructed by connecting a unit panel with flanges around the pressure-receiving surface and joining adjacent flanges to each other. A long flat plate part having the same width and a bolt hole on the side of the width of the flat plate part closer to the storage tank, with at least one protrusion formed across the bolt hole, and further on a side closer to the storage tank than the bolt hole. A sealant for a panel type assembly storage tank, characterized in that a flat plate part is thicker than the flat plate part on the other side, and both width edges of the flat plate part are thicker than the flat plate part. (2) The height of each protrusion is substantially the same, and the width of the protrusion closest to the storage tank is larger than the width of the other protrusions. Sealant for panel-type assembled storage tanks.