JP2003292091A - Supporting structure for fixing ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting structure for a fixing ring which prevents the fixing ring or a tank roof from buckling. <P>SOLUTION: The supporting structure for the fixing ring 5 connects the tank roof 6 with a tank sidewall 3 via the fixing ring 5. The tank sidewall 3 includes an outer periphery supporting part 18 for supporting the outer periphery 15 of the ring 5 and also includes an inner periphery supporting part 19 for supporting the inner periphery 8 of the ring 5. The outer periphery 15 of the ring 5 is thus supported by the outer periphery supporting part 18, and the inner periphery 8 of the ring 5 is supported by the inner periphery supporting part 19. Therefore, the ring 5 is stably fixed on an upper part of the sidewall 3. As a result, if the tank roof 6 shifts in position when fixing the roof 6 to the ring 5, the ring 5 or the roof 6 can be prevented from buckling downward. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing ring supporting structure for connecting a tank roof to a tank side wall.

[0002]

2. Description of the Related Art As an example of an underground cryogenic tank that stores cryogenic liquefied gas such as LNG, as shown in FIGS. 4 and 5, the cryogenic tank 1 is a reinforced concrete in an underground space formed by digging the ground. A tank body 4 having a tank bottom portion 2 and a tank side wall 3 of a structure is provided, and a fixing ring 5 such as a knuckle ring, a ring plate, or a compression ring is provided at the upper end of the tank side wall 3 (in the case of a ground-type low temperature tank, a knuckle ring). ), The dome-shaped tank roof 6 is fixed.

Here, when the tank roof 6 is fixed to the upper end of the tank side wall 3 by the air laying method, the tank roof 6 assembled at the tank bottom 2 in the tank body 4 is
A seal member (not shown) that can slidably contact the inner peripheral surface of the tank side wall 3 is provided, and pressurized air is introduced between the tank roof 6 and the tank bottom portion 2 by a blower to float the tank roof 6 by air pressure. Then, when the tank roof 6 is located at the upper end of the tank side wall 3, the upper surface 7 of the tank roof 6 and the inner peripheral portion 8 of the fixing ring 5 are welded, and the outer peripheral portion 9 of the tank roof 6 and the fixing ring are welded. The rear surface 10 of 5 is welded to fix the entire outer peripheral portion of the tank roof 6. In FIG. 4, reference numeral 11 denotes a pedestal for assembling the tank roof 6 on the tank bottom 2 in a dome shape, and 12 denotes a scaffold attached to the tank roof 6.

On the other hand, when the fixing ring 5 for connecting the tank roof 6 is provided on the tank side wall 3, the space 14a formed at the upper end of the tank side wall 3 is provided with the pedestal 14 in which the frame member 13 is combined. Are arranged at a predetermined interval along the circumferential direction of the fixing ring 5, and the end side support portion 16 for connecting the outer peripheral portion 15 of the fixing ring 5 to the upper portion of the gantry 14 and the fixing ring 5.
And a lower surface support portion 17 for supporting the back surface 10 on the outer peripheral side of the tank, and the space 3a of the tank side wall 3 is filled with concrete or the like.

[0005]

However, since the fixing point of the fixing ring 5 to the tank side wall 3 is located on the outer peripheral side of the fixing ring 5 by the end side supporting portion 16 and the lower surface supporting portion 17, the fixing ring is fixed. When the tank roof 6 is fixedly mounted on the tank 5, the horizontal position of the tank roof 6 must be precisely adjusted. If the position of the tank roof 6 is slightly displaced, the load balance is lost and the fixing ring 5 or There was a problem that the tank roof 6 buckled downward.

In view of the above situation, it is an object of the present invention to provide a fixing ring support structure for preventing the fixing ring or the tank roof from buckling.

[0007]

According to a first aspect of the present invention, there is provided a support structure for a fixing ring for connecting a tank roof to a tank side wall through a fixing ring, wherein the tank side wall is
A supporting structure for a fixing ring, which comprises an outer peripheral side supporting part supporting the outer peripheral part of the fixing ring, and an inner peripheral side supporting part supporting the inner peripheral part of the fixing ring,
It is related to.

According to a second aspect of the present invention, there is provided a supporting structure of a fixing ring for connecting the tank roof to the upper part of the tank side wall through the fixing ring, wherein the tank side wall extends above the tank side wall. The present invention relates to a supporting structure for a fixing ring, which is characterized in that the fixing ring is formed with the inner peripheral side supporting portion for supporting the inner peripheral portion of the fixing ring.

Further, claim 1 or 2 of the present invention is defined by claim 3.
In the supporting structure for the fixing ring, the inner peripheral side supporting portion may have a gallery along the inner peripheral surface of the side wall of the tank, or in the supporting structure for the fixing ring as described in claim 4. The inner peripheral side support portion may be configured to support the outer peripheral portion of the fixing ring, leaving a connecting portion capable of connecting the tank roof to the fixing ring. In the above support structure, the inner peripheral side support portion includes a bottom side support material extending from the tank side wall to the inner peripheral side, and a side column support extending from the support pillar-shaped support material to support the outer peripheral portion of the fixing ring. The material may be provided.

As described above, according to the first or second aspect of the invention, the fixing ring is supported by the outer peripheral portion of the fixing ring and is also supported by the inner peripheral side supporting portion by the inner peripheral portion of the fixing ring. Therefore, it is stably fixed on the side wall of the tank, and as a result, even if the position of the tank roof is displaced when the tank roof is fixedly attached to the fixing ring, the lower part of the fixing ring or the tank roof Buckling can be prevented.

According to the third aspect of the present invention, in the support structure for the fixing ring, if the inner peripheral side support portion is provided with a corridor along the inner peripheral surface of the side wall of the tank, the corridor for fixing the tank roof can be easily formed. In addition, it is possible to safely perform high-altitude work such as fixing the roof of the tank from the corridor.

According to the fourth aspect of the present invention, in the support structure for the fixing ring, the inner peripheral side supporting portion supports the outer peripheral portion of the fixing ring, leaving a connecting portion for connecting the tank roof to the fixing ring. When configured, the tank roof can be properly fixed to the fixing ring, so that the tank roof can be more easily fixed to the side wall of the tank.

According to the fifth aspect of the present invention, in the support structure for the fixing ring, the inner peripheral side support portion extends from the tank side wall to the inner peripheral side and the bottom side support material extends from the bottom side support material. If a column-shaped support member that supports the outer peripheral portion of the fixing ring is provided, the column-shaped support portion reliably supports the fixing ring and the tank roof. It can be surely prevented.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first example for carrying out the embodiment of the present invention.

The support structure of the fixing ring 5 provided at the upper end of the tank side wall 3 is such that a frame 14 is combined with a frame 14 in a space 3a formed at the upper end of the tank side wall 3 along the circumferential direction of the tank side wall 3. Are provided at predetermined intervals, the upper end of the pedestal 14 is provided with an end side support part 16 of an outer peripheral side support part 18 for connecting the outer peripheral part 15 of the fixing ring 5, and the space 3a of the tank side wall 3 is filled with concrete or the like. is doing. In addition, the back surface 10 of the fixing ring 5 is provided on the outer peripheral side support portion 18.
A lower surface supporting portion (not shown) provided on the gantry 14 may be provided to support the above.

The support structure of the fixing ring 5 is connected to a reinforcing bar or the like (not shown) forming the tank side wall 3 and is arranged along the inner circumference of the tank side wall 3 on the inner peripheral side support portion 1.
9, the inner peripheral side support portion 19 includes a bottom side horizontal member (bottom side support member) 20 that horizontally extends from the reinforcing bar to the inner peripheral side of the tank side wall 3, and the bottom side horizontal member 20 from below. A reinforcing member (bottom side support portion) 21 extending from the reinforcing bar or the like so as to be connected to the anti-rebar side end of the bottom horizontal member 20, and upward from the anti-rebar side end of the bottom horizontal member 20. The extending pillar member (support pillar-shaped member) 22 and the back surface 10 of the inner peripheral portion of the fixing ring 5 located at the upper end of the pillar member 22 are supported at a plurality of locations (two locations in FIGS. 1 and 2). And a column upper end member (column supporting member) 24. Here, the pillar upper end material 24 is the fixing ring 5.
It is connected to the back surface 10 of the inner peripheral portion of the fixing ring 5 so as to leave a connection portion 23 to which the tank roof 6 can be connected.

Further, the inner peripheral side supporting portion 19 which constitutes the supporting structure of the fixing ring 5 is arranged on the floor surface 2 of the corridor 25 which is arranged above the bottom horizontal member 20 along the inner peripheral surface of the tank side wall 3.
6 and a handrail 27.

The operation of the first example of the embodiment of the present invention will be described below.

When the tank roof 6 floated by the air-raising method is fixedly installed on the tank side wall 3, when the tank roof 6 is located at the upper end of the tank side wall 3, the upper surface 7 of the tank roof 6 and the fixing ring are fixed. 5, the outer peripheral portion 9 of the tank roof 6 and the rear surface 10 of the fixing ring 5 are welded together from the corridor 25 of the inner peripheral side support portion 19 to weld the entire outer peripheral portion of the tank roof 6. Fix the lap.

Therefore, the fixing ring 5 is supported by the outer peripheral side support portion 18 on the outer peripheral portion 15 of the fixing ring 5 and by the inner peripheral side support portion 19 on the inner peripheral portion 8 of the fixing ring 5. Therefore, it is stably fixed on the upper part of the tank side wall 3, and as a result, even when the position of the tank roof 6 is displaced when the tank roof 6 is fixedly mounted on the fixing ring 5, the tank ring 6 is fixed. Buckling of the working ring 5 or the tank roof 6 downward can be prevented.

In the support structure of the fixing ring 5, when the inner peripheral side support portion 19 is provided with the corridor 25 along the inner peripheral surface of the tank side wall 3, the corridor 2 for fixing the tank roof 6 is provided.
5 can be easily configured, and high-altitude work such as fixing the tank roof 6 from the walkway 25 can be performed safely. Further, since the connecting corridor provided on the tank roof 6 is unnecessary, the weight of the tank roof 6 can be reduced, and buckling of the fixing ring 5 or the tank roof 6 downward can be reliably prevented. .

Further, in the supporting structure of the fixing ring 5, the support upper end material 24 of the inner peripheral side supporting portion 19 of the fixing ring 5 is left with the connecting portion 23 capable of connecting the tank roof 6 to the fixing ring 5. When configured to support the outer periphery 9,
Since the tank roof 6 can be appropriately fixed to the fixing ring 5, the tank roof 6 can be more easily fixed to the tank side wall 3.

Furthermore, in the support structure of the fixing ring 5, the inner peripheral side support portion 19 includes a bottom side horizontal member 20 and a reinforcing member 21 extending from the tank side wall 3 to the inner peripheral side, a supporting member 22 and a supporting member. When the upper end member 24 is provided, the supporting member 22 and the upper end member 24 of the supporting member reliably support the fixing ring 5 and the tank roof 6, so that the buckling of the fixing ring 5 or the tank roof 6 to the lower side is further ensured. Can be prevented.

FIG. 3 is a second example for carrying out the embodiment of the present invention, in which the tank side wall 3 is modified, and in the figure, the parts denoted by the same reference numerals as those in FIGS. 1 and 2 are the same. Is represented.

In the second example, the tank side wall 28 is formed of an iron plate member or the like, and the slope of the fixing ring 29 is formed at the upper end of the tank side wall 28, which is substantially the same as in the first example, and the upper surface of the slope is set. Is provided with a reinforcing portion 30 on which the tank roof 6 can be fixedly installed. In addition, in FIG. 3, 31 indicates a shape retaining portion.

The support structure of the fixing ring 29 of the second example is connected to an iron plate member constituting the tank side wall 28 and is arranged on the inner peripheral side support portion 19 arranged along the inner periphery of the tank side wall 28. The inner peripheral side support portion 19 supports the bottom side horizontal material (bottom side support material) 20 that extends horizontally toward the inner peripheral side of the tank side wall 28 from a reinforcing bar or the like, and supports the bottom side horizontal material 20 from below. So as to extend from the reinforcing bar or the like and connected to the anti-reinforcing bar side end of the bottom horizontal member 20 and the reinforcing member (bottom side support part) 21 extending upward from the anti-rebar side end of the bottom horizontal member 20. An existing supporting member (supporting member) 22 and a supporting upper end member that supports the back surface 10 of the inner peripheral portion of the fixing ring 29 located at the upper end of the supporting member 22 at a plurality of positions (two positions in FIG. 3) ( Support member 24). Here, the pillar upper end member 24 is connected to the surface 10 of the inner peripheral portion of the fixing ring 29 so as to leave the connecting portion 23 capable of connecting the tank roof 6 to the fixing ring 29 or the reinforcing portion 30.

Further, the inner peripheral side support portion 19 constituting the support structure of the fixing ring 29 has a tank side wall 28 and a support member 22.
The floor surface 26 and the handrail 27 of the walkway 25 are provided above the bottom horizontal member 20 so as to be located between the floors.

The operation of the second example of the embodiment of the present invention will be described below.

When the tank roof 6 floated by the air-raising method is fixed to the tank side wall 28, when the tank roof 6 is located at the upper end of the tank side wall 28, the upper surface 7 of the tank roof 6 and the fixing ring are fixed. While welding the inner peripheral portion 8 of 29 (or the reinforcing portion 30),
By welding the outer peripheral portion 9 of the tank roof 6 and the back surface 10 of the fixing ring 29 (or the reinforcing portion 30) from the corridor 25 of
The entire circumference of the tank roof 6 is fixed.

For this reason, the fixing ring 29 is formed so as to extend from the upper end of the tank side wall 28, and the inner peripheral side support portion 19 allows the inner peripheral portion 8 (or the reinforcing portion 30) of the fixing ring 29 to be formed. Since it is supported, it is stably fixed on the upper portion of the tank side wall 28, and as a result, the fixing ring 2 is provided.
Even when the position of the tank roof 6 is displaced when the tank roof 6 is fixedly mounted on the plate 9, it is possible to prevent the fixing ring 29 or the tank roof 6 from buckling downward.

The operation of the second example of the embodiment of the present invention can obtain the same operation as that of the first example.

The supporting structure for the fixing ring of the present invention is not limited to the above-mentioned embodiment, but the cryogenic tank and the fixing ring may have any shape and configuration. Of course, various changes can be made without departing from the scope of the invention.

[0034]

According to the supporting structure of the fixing ring of the present invention, various excellent effects as described below can be obtained.

I) According to the first or second aspect, the fixing ring is supported by the outer peripheral portion of the fixing ring and is also supported by the inner peripheral portion of the fixing ring by the inner peripheral side support portion. It is stably fixed on the side wall of the tank, and as a result,
Even when the position of the tank roof is displaced when the tank roof is fixedly mounted on the fixing ring, it is possible to prevent the fixing ring or the tank roof from buckling downward.

II) According to the third aspect of the present invention, in the support structure for the fixing ring, the inner peripheral side support portion has a corridor along the inner peripheral surface of the side wall of the tank, and the corridor for fixing the tank roof is formed. It can be easily configured and can safely perform work in high places such as fixing a tank roof from the corridor.

III) According to a fourth aspect of the present invention, in the fixing ring support structure, the inner peripheral side supporting portion supports the outer peripheral portion of the fixing ring, leaving a connecting portion for connecting the tank roof to the fixing ring. With this configuration, the tank roof can be properly fixed to the fixing ring, so that the tank roof can be more easily fixed to the tank side wall.

IV) According to a fifth aspect of the present invention, in the support structure for the fixing ring, the inner peripheral side support portion extends from the tank side wall to the inner peripheral side, and the bottom side support material extends from the bottom side support material. If a column-shaped support member is provided to support the outer periphery of the fixing ring, the column-shaped support portion reliably supports the fixing ring and the tank roof. The buckling can be surely prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing an overall structure in a first example of the form of a support structure for a fixing ring of the present invention.

FIG. 2 is a schematic view showing a state in which the tank roofs are connected in the first example of the form of the support structure of the fixing ring of the present invention.

FIG. 3 is a schematic view showing the overall structure in a second example of the form of the support structure for the fixing ring of the present invention.

FIG. 4 is a cross-sectional view showing a state where the tank roof is connected to the side wall of the tank.

FIG. 5 is a schematic view showing a conventional support structure for a fixing ring.

[Explanation of symbols]

3 Tank side wall 5 fixing ring 6 tank roof 8 inner circumference 15 outer periphery 18 Outer peripheral support 19 Inner peripheral side support 20 Bottom horizontal material (bottom support material) 21 Reinforcement material (bottom side support material) 22 Support material (support material) 23 Connection 24 Pillar upper end material (strut support material) 25 corridor 28 Tank side wall 29 Fixing ring

Claims (5)

[Claims] 1. A support structure for a fixing ring for connecting a tank roof to a tank side wall via a fixing ring, wherein the tank side wall includes an outer peripheral side supporting portion for supporting an outer peripheral portion of the fixing ring. A support structure for a fixing ring, comprising: an inner peripheral side supporting portion that supports an inner peripheral portion of the fixing ring. 2. A supporting structure of a fixing ring for connecting a tank roof to an upper portion of a tank side wall through a fixing ring, wherein the tank side wall extends above the tank side wall to form a fixing ring. In addition, the fixing ring support structure is provided with an inner peripheral side supporting portion for supporting the inner peripheral portion of the fixing ring. 3. The fixing ring support structure according to claim 1, wherein the inner peripheral side support portion is provided with a gallery along the inner peripheral surface of the tank side wall. 4. The fixing according to claim 1, 2 or 3, wherein the inner peripheral side support portion is configured to support the outer peripheral portion of the fixing ring, leaving a connecting portion capable of connecting the tank roof to the fixing ring. Ring support structure. 5. The inner peripheral side support portion extends from the side wall of the tank toward the inner peripheral side, and a column-shaped support extending from the bottom side support material and supporting the outer peripheral portion of the fixing ring. The support structure for a fixing ring according to claim 1, 2, 3 or 4, further comprising: