JPS5921870A - Roof apparatus of cylindrical 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] In the construction of roofs for flat-bottomed cylindrical tanks of various types, including above-ground, underground, and semi-underground tanks, conventional methods In this method, as shown in Figures 1 and 2, the required number of jack frames (2) are installed independently on the top of the side wall (1).
1 The roof (5) was lifted up via the hanging lot section 4) by a jack (3) set on the same frame (2).

However, in this method, the hanging point value due to the jacking and the side wall position are shifted in the horizontal direction, so a large bending moment is generated at the top of the side wall that supports the jacking frame.
In order to resist this bending moment, a large amount of reinforcement was required at the top of the side wall.

In addition, the jack mount was severely deformed due to its collapse, making it difficult to fix the roof to the side walls, etc.

The present invention has been proposed in order to eliminate such problems, and is a cylindrical tank characterized in that the roof launch frames supported on the top of the side wall of the cylindrical tank are connected by a ring material. This relates to a roof launching device.

In the present invention, as described above, the roof lifting frame is supported on the top of the side wall of the cylindrical tank, and the frames are connected with each other by a ring material, so that the deformation of the jacking frame is suppressed by the restraining force of the ring material. The present invention has many advantages, such as greatly reducing the bending moment acting on the top of the side wall, requiring less reinforcement, and greatly suppressing deformation of the jack frame, making it easier to fix the roof and side wall, etc. It has advantages.

The present invention will be described below with reference to the illustrated embodiments.

Figures 3 to 5 show the case where the present invention is applied to an underground flat-bottomed cylindrical tank, in which a jack frame 02 is fixed to the top of a concrete side wall 01), and a jack frame 02 is fixed to the top of the concrete side wall 01), and a jack 02 mounted on the frame (121) is The roof (15) is lifted up via the hanging iron (1 (a)).

A jack mount connecting ring member 06) is connected between the tops of the mount θ2.

When a roof load W is applied to the jack 0 row, as shown in the schematic diagram of FIG. 6, deformation occurs in the frame a2 as shown by the dotted line, but at this time, the ring material acts as a horizontal spring, so By restraining the deformation of the jacking frame a3, and due to the horizontal force F generated at this time, the bending moment in the height direction of the jacking frame α2 is as shown by the dotted line A in the bending moment distribution diagram in FIG.
becomes smaller as the height becomes smaller. If the connecting ring material is not provided, the bending moment does not change in the height direction as shown by the dashed line B.

In this way, the bending moment acting on the top of the side wall (11) that supports the jack mount 02 is significantly reduced, requiring less reinforcement, and the deformation of the jack mount ← is reduced to a minimum.
Fixing work between the roof (15) and the side walls aυ etc. becomes easier.

8 and 9 respectively show an embodiment in which the present invention is applied to an above-ground flat-bottomed cylindrical tank. Knuckle plate α barrel and outer tank side plate 0 duck top girder (A)
A jack pedestal connection ring member is connected between the pedestals 021.

In the figure, (21) is a reinforcing material, and (22) is a stiffener. Other parts equivalent to those of the above embodiment are given the same reference numerals.

Figure 9 shows the case of a single-shell tank, in which the jack rack is supported on the top of the side plate (23), and the top girder (24) is supported on the top of the side plate (23).
) is connected to the side stiffener (25) via a vertical reinforcing member (26), and a jack mount connecting ring material al is connected between the mount a. In the drawings, parts equivalent to those of the above embodiments are given the same reference numerals.

In each of the above embodiments, the jack mount connecting ring material (16) is arranged at the top of the jack mount α, but in the embodiment shown in FIGS. 10 and 11, the jack mount connecting ring material (16) is arranged horizontally on the side of each jack frame (121), and in the embodiment shown in FIGS. 12 and 13, the ring material side is arranged at an angle on the side of each jack frame (121). In the embodiment shown in FIGS. 14 and 15, the ring material Oe is arranged in a truss shape.

Note that the circumferential shape of the ring material αe between the jack frames α may be a straight line, an arc, or another curved line, and a plurality of connecting rings may be provided.

In the drawings, parts equivalent to those of each of the embodiments described above are designated by the same reference numerals.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments (and it is possible to make various modifications to the design without departing from the spirit of the present invention). be.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the operating state of a conventional roof lifting device for a cylindrical tank, FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal cross-sectional view showing the operating state of the roof lifting device for a cylindrical tank according to the present invention. 4 is a plan view of the same, FIG. 5 is an enlarged view of its main parts, FIG. 6 is an explanatory diagram of its operation, FIG. 7 is a moment distribution diagram thereof, and FIGS. 8 and 9 are each a diagram of the present invention. FIGS. 10 and 11 are longitudinal sectional views showing other embodiments of the present invention, and FIGS. A side view of the vertical cross section showing another embodiment,
FIGS. 14 and 15 are side views of a longitudinal cross-section portion showing still other embodiments of the present invention. 0υ...Side wall, (12+...Jacket frame, θ3)
・-・Jacket, (A)...Roof, hood...Jacket frame connection ring material, 07)...Inner tank side plate, (+!1・
...Outer tank side plate, (23)...Side plate sub-agent Patent attorney
Shige Okamoto 2 people outside the literature 1st (2) Fig. 3 2V '7F4 Fig. 5 O90

Claims (1)

[Claims] A roof lifting device for a cylindrical tank characterized by connecting roof lifting frames supported at the top of the side wall of the cylindrical tank with a ring material.