JPH10148044A - Construction method of double shell tank and side plate mounting device used for the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly perform construction by attaching a side plate mounting device to the top part of the uppermost side plate of an already constructed inner wall, and stacking the side plate on the top part of an outer wall by means of the side plate mounting device in a matching state, and connecting them by welding. SOLUTION: A side plate mounting device A is mounted on the uppermost side plate 12 constituting an inner wall 11, one end of a connection wire 19 is engaged to the engaging part 18 of both the side plates 12, and the other end is engaged to the hook of a hanging hoist 16 to be light. Next, a traverse motor is driven to move the side plate toward a radius direction, both the side plates 12 are lowered, mounted to be abutted on the upper part end face of the uppermost side plate 12 constituting an already built outer wall 10, and connection is performed by welding. Next, the device A is removed by a crane or the like, and attached to the top part of the uppermost side plate 12 of the outer wall 10 to construct the inner wall 11. Thereby a double shell tank can be easily and quickly constructed by mounting the device A on the inner wall 11 or the outer wall 12 and moving it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-shell tank constructed by concentrically attaching an outer wall and an inner wall, and forming the outer wall and the inner wall by vertically stacking a large number of rectangular side plates on a plurality of stages. And a side plate mounting device used in the method.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing the above-mentioned double shell tank, a method using a crane 50 as shown in FIG. 7 has been proposed. Briefly describing the conventional method with reference to FIG. 7, first, a crane 50 is provided around the ground on which a double-shell tank is to be constructed. Then crane 5
The balance 52 suspended from the tip of the telescopic boom 51
Thus, the rectangular side plates 53 stacked on the ground are lifted one by one, and the uppermost side plate 53 constituting a part of the inner wall 54 or the outer wall 55 already constructed on the bottom plate 56 is lifted.
And weld the joints. By repeating such operations, the inner wall 54 and the outer wall 55
And can be built. In addition, as shown in FIG.
Usually, the inner wall 54 precedes the outer wall 55 by one step, and the inner wall 54 is always higher than the outer wall 55 by one step.

[0003]

However, the above-described conventional method of constructing a double-shell tank still has the following problems to be solved. That is, when the double shell tank is a large tank, for example, the diameter is 60 m and the height is 30 m, which is huge. Therefore, the rectangular side plate 53 used for constructing such a double shell tank is also required. , The thickness is 10-38m
m, 4200 mm in height, 15000 mm in length, and a large weight of about 5 to 19 tons.

[0004] It is extremely difficult and cumbersome to lift the side plate 53 made of such a large steel plate to a height of 30 m or more using the crane 50 and to stack it on the existing side plate 53. When the wind is strong, the suspended side plate 53 swings due to the wind, so that the work of stacking on the existing side plate 53 becomes impossible. It is necessary to perform the work of stacking the side plates 53 while moving the crane 50 around the double shell tank, but since the traveling speed of the crane 50 is slow,
From this aspect, the efficiency of the stacking operation is reduced. Furthermore, since the crane 50 cannot travel on uneven ground that is not leveled, preparation work such as leveling to eliminate unevenness on the ground is separately required to ensure stable travel.

Japanese Patent Application Laid-Open No. 58-181966 discloses a method in which a rail is laid around a tank to be constructed, and a stand on which blocks are sequentially stacked is placed on the rail so as to be able to run. At the center, there is provided a column for stacking blocks, a horizontal beam is rotatably provided on the column, a middle of the horizontal beam is supported by a gantry, and a storage tank construction device is provided with a material conveying device on the horizontal beam. I have. However, when a huge double-shell tank with a diameter of 60 m and a height of 30 m is constructed using such a storage tank construction device, for example, a large-scale stand and cross beams are required. However, these equipment costs become large and are not realistic.

[0006] The present invention has been made in view of such circumstances, and a double shell tank can be provided without using a crane.
An object of the present invention is to provide a method for constructing a double shell tank that can be constructed easily, quickly, safely and inexpensively, and a side plate mounting device used in the method.

[0007]

According to the present invention, there is provided a semiconductor device comprising:
The method for constructing a double-shell tank described above is a double-shell construction in which an outer wall and an inner wall are concentrically attached to each other, and the outer wall and the inner wall are each formed by vertically stacking a large number of rectangular side plates over a number of stages. In the method of building a tank, a side plate mounting device is attached to the top of the uppermost side plate of the inner wall that has already been built, and the side plate for building the outer wall from the ground using the side plate mounting device is lifted,
The side plates for building the outer wall are stacked in alignment on the top of the already built outer wall located one or two steps below the uppermost side plate of the inner wall, connected by welding, and then the To remove the side plate mounting device from the top of the uppermost side plate of the inner wall, attach the side plate mounting device on the side plate connected to the top of the outer wall, and construct the inner wall from the ground using the side plate mounting device. And the side plates for constructing the inner wall are stacked in alignment on the top of the uppermost side plate of the inner wall, connected by welding, and the above operation is repeated to repeat the above operation. Build a heavy shell tank.

According to a second aspect of the present invention, there is provided a side plate mounting apparatus used in the method for constructing a double shell tank, wherein an outer wall and an inner wall are concentrically mounted, and the outer wall and the inner wall are each formed by connecting a large number of rectangular side plates to a large number of steps. A side plate mounting device used in a method of constructing a double-shell tank constructed by vertically stacking over the outer wall or the inner wall in a state of straddling the top of the uppermost side plate of the outer wall or the inner wall and surrounding the tank. A plurality of U-shaped saddles that can be mounted at intervals in the direction,
A plurality of pillars respectively erected on the saddle, a vertically long connecting beam connecting the tops of the pillars, and attached to the tops of the pillars in a state of extending in a tank radial direction orthogonal to the outer wall and the inner wall. A plurality of hoist rails, a plurality of suspension hoists respectively attached to the hoist rail so as to be movable in the tank radial direction, and a plurality of suspension hoists attached to tips of the suspension wires of the suspension hoists, respectively.
A plurality of engaging members capable of engaging with engaging portions protruding from one side edge of the side plate placed on the ground.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The configuration of the side plate mounting device used in the method for constructing a double shell tank according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2 show a part of a double shell tank B being constructed by the side plate mounting device A according to the present embodiment. As shown, the outer tank bottom plate 9
On the peripheral edge of the inner tank bottom plate 9a, a part of the annular outer wall 10 and a part of the inner wall 11 are already constructed concentrically using the side plate mounting device A according to the present embodiment, and are constructed on the inner wall 11. The rectangular side plate 12 is constructed two steps ahead of the side plate 12 formed on the outer wall 10.

As shown in FIGS. 1 and 2, the side plate mounting device A substantially extends over the top of the uppermost side plate 12 of the inner wall 11 and is spaced from the inner wall 11 in the circumferential direction. A plurality of saddles 13 having a U-shaped cross section to be attached;
A plurality of pillars 14 erected above each other, a plurality of hoist rails 15 respectively attached to the top of the pillar 14 in a state of extending in a tank radial direction orthogonal to the outer wall 10 and the inner wall 11, and Vertical connecting beams 14a to 14c to be connected, a plurality of suspension hoists 16 movably attached to the hoist rail 15 in the radial direction of the tank, and a front end of a suspension wire 17 of the suspension hoist 16, respectively, And a connecting wire 19 which is an example of an engaging member that can be engaged with an engaging portion 18 protruding from one side edge of the side plate 12 placed thereon.

Next, the configuration of each part of the side plate mounting apparatus A having the above configuration will be described. As shown in FIGS. 1 to 3, each saddle 13 having a U-shaped cross section attached so as to straddle the top of the uppermost side plate 12 of the inner wall 11 extends along the top of the side plate 12 in the present embodiment. It is configured as a traveling vehicle that can automatically travel. That is, each saddle 13
An elongated horizontal top plate 20 extending in the circumferential direction of the inner wall 11,
It comprises a pair of left and right vertical side plates 21 and 22 having a U-shaped cross-section frame, which is vertically downwardly provided from both side edges of the top plate 20 in parallel, and the left and right vertical side plates 21 and 22 are The uppermost side plate 12 of the inner wall 11 is opposed to the left and right side surfaces.

[0012] Both ends of an axle 26 having a traveling wheel 25 mounted at the center thereof are rotatably supported by bearings 23 and 24 formed on the upper portions of the left and right vertical side plates 21 and 22, respectively. The top surface 27 of the uppermost side plate 12 of the inner wall 11
And is mounted so as to freely roll in the circumferential direction. Right vertical side plate 2
A longitudinal motor 28 is attached to the upper outer surface of the second 2,
Its output shaft is connected to the axle 26. On the other hand, guide wheels 29 and 30 are rotatably mounted on the lower inner surfaces of the left and right vertical side plates 21 and 22, respectively, and these guide wheels 29 and 30 are located at the top of the uppermost side plate 12 of the inner wall 11. Are abutted on both sides. With the configuration described above, the saddle 13 can be moved smoothly and stably in the circumferential direction on the top of the uppermost side plate 12 of the inner wall 11 by driving the vertical motor 28.

Next, referring to FIGS. 1, 2, 4 and 5, each hoist rail 15 and this hoist rail 15 will be described.
The structure of the suspension hoist 16 movably mounted in the radial direction of the tank will now be described. As shown in FIG. 5, the hoist rail 15 is formed from an I-shaped steel, and on the lower surface at the center thereof, as shown in FIGS. 1, 2, and 4, a column standing on a saddle 13 is provided. The upper end of 14 is fixedly connected and forms a T-shape in a side view together with the column 14. As shown in FIG. 4, the support 1 of the hoist rail 15
In order to increase the strength of connection to the hoist rail 4, a pair of brackets 31, 32 is provided at the connecting portion between the hoist rail 15 and the support 14.

As shown in FIGS. 4 and 5, the suspension hoist 16 comprises a hoisting device 33 and the traveling wheels 3 for attaching the hoisting device 33 to the hoist rail 15 so as to be able to traverse freely.
And a traversing motor 36 attached to the traversing machine frame 35. As shown in FIGS. 2 and 5, a hook 37 is attached to a tip of the suspension support wire 17 of the hoisting device 33, and the hook 37 is connected to an upper end of a connection wire 19, which is an example of an engagement member. The lower end of the connecting wire 19 is engaged with an engaging portion 18 formed of a perforated block protruding from one side edge of the side plate 12 placed on the ground. As shown in FIG. 6, when the side plate 12 is suspended by the suspension hoist 16, the hoist rail 1 is used to oppose the bending moment applied to the saddle 13, the column 14, and the hoist rail 15.
5 and the inner tank bottom plate 9a is connected to the end on the side where the suspension hoist 16 is not mounted by the reinforcing wire 38, and a reinforcing bracket 39 is mounted between the lower part of the inner wall 11 and the inner tank bottom plate 9a. it can.

Next, a method of constructing a double shell tank using the side plate mounting apparatus A having the above-described configuration will be specifically described with reference to FIGS. As shown in FIG. 1, in order to increase the tank construction efficiency by the side plate mounting device A laid on the uppermost side plate 12 constituting the inner wall 11, the edges of the two side plates 12 are separated from each other on the ground. Two blocks are previously connected by welding. An engaging portion 18 is welded to the edge of both side plates 12 forming the two-piece block, and one end of a connecting wire 19 is engaged with the engaging portion 18,
The other end is engaged with the hook 37 of the suspension hoist 16.
The hoisting device 33 is driven to raise the side plate 12 having a two-block configuration as shown in FIG.

As shown in FIG. 2, the traverse motor 36 is driven to move the two-block side plate 12 radially inward to form the uppermost side plate 1 constituting the existing outer wall 10.
Match with 2. The hoisting device 33 is driven again to lower the two-block side plate 12 as shown in FIG. 2, and the lower end surfaces thereof are connected to the upper end surface of the uppermost side plate 12 constituting the existing outer wall 10. Abut and mount. Thereafter, seam welding is performed to firmly connect these side plates 12 to each other. Next, the vertical motor 28 is driven to move the side plate mounting device A in the circumferential direction, and at the moved position, the same operation as described above is performed by the side plate mounting device A. By repeating this operation, all the side plates 12 constituting the outer wall 10 at that stage are mounted and welded.

Next, using a crane or the like, the side plate mounting device A
Is detached from the uppermost side plate 12 constituting the inner wall 11 and turned over, and the side plate mounting device A is mounted on the top of the uppermost side plate 12 of the outer wall 10 constructed as described above, and the side plate mounting device A is used. A side plate 12 for constructing the inner wall 11 from the ground (including the inner tank bottom plate 9a) is lifted, and an inner wall 11 is formed on the top of the inner wall 11 already constructed at the same height as the uppermost side plate 12 of the outer wall 10. Can be stacked in an aligned state, and then the both side plates 12 can be firmly connected to each other by seam welding or the like.

As described above, in the present embodiment, the double shell tank is constructed by simply mounting the side plate mounting device A having the suspension hoist 16 on the inner wall 11 or the outer wall 10 and moving it. And a double shell tank can be easily and efficiently constructed. Further, in constructing the double shell tank, a crane is not required except when the side plate mounting device A is attached to or detached from the inner wall 11 or the outer wall 10, so that the safety of the construction work can be improved. Yes, and can be built at low cost.

As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. It also includes other embodiments and modifications that can be considered within the scope of the matters described. For example, in the above-described embodiment, the same side plate mounting device was used when constructing the outer wall and the inner wall, but a double shell tank was constructed while mounting separate side plate mounting devices on the outer wall and the inner wall, respectively. You can also.

[0020]

In the method for constructing a double shell tank according to the first aspect of the present invention, the side plate mounting device is attached to the top of the uppermost side plate of the inner wall or the outer wall which has already been constructed, and the side plate mounting device is used to cut off the ground from the ground. A side plate for constructing the outer wall or the inner wall is lifted, and a side plate for constructing the outer wall or the inner wall is aligned with a top plate of the outer wall or the inner wall which is already constructed from the uppermost side plate of the inner wall or the outer wall. They are connected. Therefore, the double shell tank can be constructed simply by mounting and moving the side plate mounting device on the inner wall or the outer wall, and the double shell tank can be easily, efficiently, and inexpensively constructed.

Further, in constructing the double shell tank, a crane is not required except when the side plate mounting device is attached to or detached from the inner wall or the outer wall, so that the safety of the construction work can be improved. it can. Furthermore, since there is no need to use a crane, there is no need for crane work passages and leveling work, so the construction cost of the double shell tank can be reduced, and piping work can be performed in parallel with tank work. Therefore, the construction of the double shell tank can be performed easily and efficiently from this aspect.

In the side plate mounting device according to the second aspect,
A plurality of saddles having a U-shaped cross section that are attached to the top of the uppermost side plate of the outer wall or the inner wall that has already been constructed and that are attached at intervals in the tank circumferential direction, and are respectively erected on the saddles. A plurality of struts, a vertically long connecting beam connecting the tops of the struts, a plurality of hoist rails respectively attached to the tops of the struts so as to extend in a tank radial direction orthogonal to the outer wall and the inner wall, and a tank radius on the hoist rail. A plurality of suspension hoists each movably mounted in the direction, and each of the suspension hoists is attached to a tip of a suspension wire of the suspension hoist, and protrudes from one side edge of a side plate placed on the ground. A plurality of engaging members that can engage with the engaging portion.

Therefore, the side plate mounting device can easily and efficiently construct the double-shell tank, and has a simple structure consisting of a saddle, a column, a hoist rail, and a suspension hoist. , And can be manufactured at low cost. Also, since the side plate mounting device is relatively lightweight,
The double shell tank can be easily attached to and detached from the outer wall or the inner wall of the double shell tank using a crane or the like, and the double shell tank can be easily and efficiently constructed from that aspect.

[Brief description of the drawings]

FIG. 1 is a perspective view during a construction operation of a side plate mounting device used in a method of constructing a double shell tank according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view of the main part.

FIG. 4 is a side view of the main part.

FIG. 5 is a view taken along the line II of FIG. 4;

FIG. 6 is a side view of the same side including a reinforcing wire and a reinforcing bracket to counter bending moments applied to the saddle and the like.

FIG. 7 is an explanatory view of a conventional method for constructing a double shell tank.

[Explanation of symbols]

A Side plate mounting device B Double shell tank 9 Outer tank bottom plate 9a Inner tank bottom plate 10 Outer wall 11 Inner wall 12 Side plate 13 Saddle 14 Support 14a Vertical connection beam 14b Vertical connection beam 14c Vertical connection beam 15 Hoist rail 16 Suspension hoist 17 Suspension wire Reference Signs List 18 engaging portion 19 connecting wire (engaging member) 20 top plate 21 left vertical side plate 22 right vertical side plate 23 bearing 24 bearing 25 running wheel 26 axle 27 top surface 28 longitudinal motor 29 guide wheel 30 guide wheel 31 bracket 32 bracket 33 Hoisting device 34 running wheel 35 traversing machine frame 36 traversing motor 37 hook 38 reinforcing wire 39 reinforcing bracket

Claims (2)

[Claims] 1. A method for constructing a double shell tank, wherein an outer wall and an inner wall are concentrically attached, and the outer wall and the inner wall are each constructed by vertically stacking a large number of rectangular side plates over a large number of stages. A side plate mounting device is mounted on the top of the uppermost side plate of the inner wall that has already been constructed, and the side plate for constructing the outer wall from the ground is lifted using the side plate mounting device, and the uppermost side plate of the inner wall is mounted. The side plates for constructing the outer wall are stacked in alignment on the top of the already constructed outer wall located one or two steps below and connected by welding, and then the uppermost side plate of the inner wall is The side plate mounting device is removed from the top, and the side plate mounting device is mounted on the side plate connected to the top of the outer wall, and the inner wall is constructed from the ground using the side plate mounting device. The side plates for constructing the inner wall are stacked in an aligned state on the top of the uppermost side plate of the inner wall, connected by welding, and the above operation is repeated to repeat the above operation. A method for constructing a double shell tank, comprising constructing the double shell tank. 2. A method for constructing a double shell tank in which an outer wall and an inner wall are mounted concentrically and the outer wall and the inner wall are each constructed by vertically stacking a large number of rectangular side plates over a large number of stages. A plurality of saddles having a U-shaped cross section that are attached to the top of the uppermost side plate of the outer wall or the inner wall and that are attached at intervals in the tank circumferential direction. A plurality of pillars respectively erected on the saddle, a vertically long connecting beam connecting the tops of the pillars, and a top of the pillar, in a state of extending in a tank radial direction orthogonal to the outer wall and the inner wall, respectively. A plurality of hoist rails to be mounted, a plurality of suspension hoists respectively movably attached to the hoist rail in the tank radial direction, and a suspension wire of the suspension hoist. And a plurality of engaging members which are respectively attached to the engaging portions and are engageable with engaging portions protruding from one side edge of the side plate placed on the ground. Side plate mounting device used for