JP3047807B2 - Steel pipe connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for steel pipes, and more particularly to a module for connecting modules used in a building such as a gantry for supporting equipment such as a nuclear power plant and pipes, etc. The present invention relates to a connection structure of a steel pipe.

[0002]

2. Description of the Related Art In a nuclear power plant, a plurality of modules (box-shaped units constructed by assembling steel pipes) manufactured at a factory in advance are constructed on a building such as a gantry for supporting equipment and pipes used in the plant. A method of building by stacking is known. According to this construction method, as shown in FIG. 5 , first, the lower module 1 is installed at a predetermined position, and then the upper module 2 is stacked on the lower module 1, as shown in FIG. Weld the parts. In this case, the legs of the upper module 2 are stacked on the plates 3, 3,... Provided on the upper ends of the pillars of the lower module 1, and the plates 3, 3,.
To be welded.

The module 1 is conveyed and lifted by hanging a wire 5 on hanging brackets 4, 4,... Provided near the upper end of a column of the module 1, and lifting the wire 5 by a lifting machine such as a crane. Had been transported.

[0004]

By the way, in the method of constructing a building such as a gantry by stacking the modules as described above, when connecting the modules, in order to improve the strength of the building, a plurality of pillar portions are required. It is necessary to match the cores and connect them. However, since the modules are lifted and stacked by a lifting machine such as a crane as described above, it is extremely difficult to connect all the cores of the pillars so as to coincide with each other.
For this reason, conventionally, when a misalignment occurs after stacking the upper module with a crane or the like, the pillar portion is pulled with a chain block or the like, and the pillar portion is corrected so that the cores match, and then the connection portion is Had been welded.

[0005] However, this straightening work requires a great deal of labor and is a great loss of construction time.
The present invention has been made in view of such circumstances, and enables quick and easy alignment, and has a small number of parts.
It is an object of the present invention to provide a connection structure of a steel pipe having a small number of parts and a simple structure.

[0006]

In order to achieve the above object, the present invention relates to a steel pipe connecting structure for connecting a lower end of one steel pipe lifted by a hoist to an upper end of the other steel pipe. The upper end of the other steel pipe is closed with a plate, a lifting metal fitting is provided on the plate, and the lower pipe is engaged with the lower end opening of the one steel pipe to guide the one steel pipe coaxially with the other steel pipe. the guide member is provided, wherein the suspended
The fall stopper for reinforcing the metal fitting also serves as the guide member .

According to the present invention, the connection between the steel pipes is performed as follows. First, one steel pipe is lifted by a hoist,
It is located above the other steel pipe. At this time, one steel pipe is hung by hanging a hook of a hoist or the like on a hanger provided at an upper end thereof. Next, rough alignment is performed so that the other steel pipe and the lifted one steel pipe are positioned substantially coaxially. Then, at the position considered to be substantially coaxial, one suspended steel pipe is lowered toward the other steel pipe. One of the lowered steel pipes has its lower end opening engaged with a guide member provided at the upper end of the other exchange, and is guided coaxially with the other steel pipe.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a connecting structure of a steel pipe according to the present invention. FIG. 3 is a view showing a state before a connection structure of a steel pipe according to the present invention is improved.
It is a perspective view which shows the form .

As shown in FIG. 1, a steel pipe 10 having a rectangular cross section has its upper end closed by a plate 12 having a rectangular shape. This plate 12 is used to
And is integrally formed with the steel pipe 10. At the center of the plate 12, a hanging bracket 14 formed in an inverted U shape is fixed. The legs of the hanging metal fittings 14 are reinforced with fall stoppers 16, 16 formed in a rectangular shape.

On the plate 12, a guide member 18 formed in an L-shape near four corners of the plate 12,
18,... Are provided. Each guide member 18 is disposed such that two orthogonal sides are respectively disposed along the respective sides of the plate 12 and is positioned so as to be located slightly inside the inner periphery of the steel pipe 10. Therefore, steel pipe 1
0 are connected coaxially, each guide member 18
Is stored in the steel pipe 10.

The operation of the embodiment before improvement of the present invention configured as described above is as follows. First, as shown in FIG. 3 , a case where a new steel pipe 10 'is connected to the existing steel pipe 10 will be described. First, the steel pipe 10 ′ on the connection side is lifted by a lifting machine such as a crane, and is positioned above the existing steel pipe 10. At this time, 'the steel pipe 10 of the connection side, raising hanging over the hanging bracket 14 to the crane hook provided at its upper end in the same manner as the existing steel pipe 10.

Next, while the steel pipe 10 'on the connection side is lifted, the cores are roughly aligned so that the existing steel pipe 10 and the steel pipe 10' on the connection side are positioned substantially coaxially. Then, when it is considered that the steel pipes 10 and 10 ′ are positioned substantially coaxially, the steel pipe 10 ′ on the connection side is lowered toward the existing steel pipe 10. The lowered steel pipe 10 ′ on the connection side rides on the plate 12 provided on the existing steel pipe 10, whereby
The steel pipe 10 'on the connection side is connected to the existing steel pipe 10. At this time, the guide members 18, 18,... Provided on the plate 12 are housed in the steel pipe 10' on the connection side. The steel pipe 10 'on the connection side is connected to the existing steel pipe 10'.
Of the steel pipe 1 on the connection side
0 ′ is the inner edge of the lower end opening and the guide member 1
8 are engaged with each other and guided coaxially with the existing steel pipe 10 .

Therefore, when the steel pipe 10 'on the connection side rests on the plate 12 of the existing steel pipe 10, the axes of the steel pipes 10' are already aligned, and it is necessary to align the steel pipes 10, 10 'again. There is no. Therefore, the steel pipe 1 on the connection side
After placing 0 ′ on the plate 12 of the existing steel pipe 10,
The connection side steel pipe 10 'and the plate 12 of the existing steel pipe 10 may be welded.

With the above-described series of operations, the operation of connecting a new steel pipe 10 'to the existing steel pipe 10 is completed. Hereinafter, when connecting a new steel pipe 10', the above operation may be repeated. As described above, according to the connection structure of the steel pipes before the improvement, the steel pipes 10 and 10 ′ can be easily coaxially connected to each other by substantially the same operation as the normal connection operation. This eliminates the need for adjustment work for centering after connection, and enables quick connection work. Further, after the connection, the hook 24 of the existing steel pipe 10 is stored in the steel pipe 10 ', so that the hook 24 does not protrude and does not become an obstacle as in the related art.

Next, as shown in FIG. 4 , a description will be given of a case where modules 20 (the steel pipe 10 is applied to the column portions 20a, 20a,...) Of the module 20 are connected to each other. First, module 2 on the connection side
0 ′ is lifted by a lifting machine such as a crane, and is positioned above the existing module 20. At this time, the connection-side module 20 'wraps the wire 22 around the hanging fittings 14, 14, ... provided at the upper end of each of the pillars 20a, 20a, ..., and hangs the wire 22 on the hook 24 of the crane. lift.

Next, in a state where the connection-side module 20 'is lifted, the pillars 20a, 20a,... And 20a', 20 of the existing module 20 and the connection-side module 20 'are lifted.
a ′,... are roughly aligned on the same axis. Then, when it is considered that the pillar portions 20a and 20a 'are positioned substantially coaxially, the module 20' on the connection side is lowered toward the existing module 20.

Each column 20a 'of the lowered connection side module 20' rides on the plate 12 provided on the upper end of each column 20a of the existing module 20, whereby the connection side module 20 ' , Are connected to the existing module 20. At this time, the guide members 18, 18,... Provided on the respective plates 12 are connected to the module 2 on the connection side.
The module 20 'on the connection side is mounted by placing the module 20 on the connection side on the plate 12 of the existing module 20 so that the module 20' on the connection side is accommodated in each of the column portions 20a.
Each of the pillar portions 20a 'of the existing module 20 is engaged with the inner edge of the lower end thereof and the guide member 18.
a is guided on the same axis.

Therefore, the connection side module 20 '
However, when the module 20 ′ on the connection side is placed on the plate 12 of the existing module 20,
The axes of the pillar portions 20a 'and 20a are already coincident with each other, and there is no need to newly align the axes. therefore,
After the connection-side module 20 'is placed on the plate 12 of the existing module 20, the connection-side module 20'
And the plate 12 of the existing module 20 may be welded.

By the above series of operations, the existing module 2
The operation of connecting a new module 20 ′ to 0 is completed, and when connecting a new module 20 ′, the above operation may be repeated. As described above, even when the modules 20 and 20 ′ are connected to each other, the modules 20, 2 ′ can be easily connected by the same operation as the normal connection operation.
0's can be connected coaxially. This eliminates the need for adjustment work for alignment after connection,
Quick connection work can be performed.

Further, as is apparent from the embodiment for connecting the modules 20 and 20 'to each other, the connection structure of the steel pipe before the improvement according to the present invention is used for connecting structures having multiple axes. Is particularly effective, and it is not necessary to align the axes after connection. Thus, the connection operation can be performed extremely quickly compared to the conventional connection method in which adjustment is performed while checking the balance between the axes after connection.

According to the present invention, there is provided a steel pipe before improvement according to the present invention.
The connection structure has been further improved to reduce the number of parts.
It is also simpler in structure. FIG. 1 is a perspective view showing a configuration of a first embodiment of a connecting portion structure of a steel pipe according to the present invention. Note that the same members as those of the connection structure of the steel pipe before the improvement are denoted by the same reference numerals, and description thereof will be omitted.

[0022] In connection part structure of the steel pipe in the first embodiment, the stop 16, 16 fall in the form before improvement described in FIG. 3, also functions of the guide member 18 for guiding the steel pipe 10 coaxially I have. That is, as shown in FIG. 1 , the hanging metal fitting 14 is
It is reinforced with 8,28. The stopper 28 is disposed along two opposing sides of the plate 12, the bottom of the stopper 28 is welded to the plate 12, and the inner surface thereof is connected to the hanging fitting 1.
4 are welded to the legs. In addition, the length of the bottom side is formed slightly shorter than the length of one side inside the steel pipe 10.

According to the steel pipe connecting portion structure of the first embodiment configured as described above, like the connecting portion structure of the steel pipe before the improvement , when connecting the steel pipes 10 and 10 ′, the weight of the steel pipe is reduced by its own weight. It has a guide function for automatically guiding on the same axis, so that quick and easy connection work can be performed. Meanwhile, stop falling
Because Because 28, 28 also serves as a guide member, wherein the improvement
Since the number of parts is small and the structure is simple as compared with the connection structure of the steel pipe in the previous embodiment, the manufacturing is easy and the manufacturing cost can be suppressed.

FIG . 2 is a sectional view of a connecting portion structure of a steel pipe according to the present invention .
It is a perspective view showing composition of a 2nd embodiment.

The connection structure of steel pipes according to the second embodiment is an example in which the invention is applied to round steel pipes 11 and 11 '. The stoppers 29 and 29 guide the round steel pipe 11' coaxially. It also functions as a guide member. That is, as shown in FIG. 2 , the hanging fitting 14 is reinforced by the fall stoppers 29, 29 formed in an arc shape. This stopper 29
It has the same curvature as the inner circumference of the steel pipe 11 and is formed so as to be inclined upward and inward. The bottom is welded to the plate 13 , and the inner surface is welded to the leg of the hanging bracket 14.

According to the connecting structure of the steel pipe of the second embodiment configured as described above, like the connecting structure of the steel pipe of the first embodiment, when connecting the steel pipes 11 and 11 ′,
It has a guide function to automatically guide on the same axis by its own weight,
Quick and easy connection work can be performed. Meanwhile, defeat
Since the stoppers 29, 29 also serve as guide members,
Compared with the connection structure of the steel pipe before the improvement , the number of parts is small and the structure is simple, so that the manufacturing is easy and the manufacturing cost can be suppressed.

[0027]

As described above, according to the present invention,
The steel pipes can be easily and coaxially connected to each other by substantially the same work as a normal connection work, and it is not necessary to perform centering after connection. Thereby, connection work between steel pipes can be performed quickly. Also, the number of parts
Small and structurally simple, easy to manufacture,
Operation costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a first embodiment of a connecting portion structure of a steel pipe according to the present invention.

FIG. 2 shows a second embodiment of the connection structure of the steel pipe according to the present invention.
Perspective view showing the configuration of the embodiment

FIG. 3 is a perspective view showing the configuration of a form before the improvement of the connection structure of the steel pipe according to the present invention.

FIG. 4 shows a structure of a connection part of a steel pipe before improvement according to the present invention.
Of connections between modules constructed using steel pipes
Perspective view

FIG. 5 illustrates connection between modules according to a conventional method .
Perspective view

[Explanation of symbols]

10, 10 '... steel pipe (square) 11, 11' ... steel pipe (round) 12 ... plate (for square steel pipe) 13 ... plate (for round steel pipe) 14 ... hanging bracket 28 ... stopper (guide for square steel pipe) 29: When it also serves as a guide member for round steel pipes 20: Module

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 21/14-21/18 E04B 1/58 503

Claims (1)

(57) [Claims] 1. A steel pipe connection structure for connecting a lower end of one steel pipe lifted by a hoist to an upper end of another steel pipe, wherein the upper end of the other steel pipe is closed by a plate and lifted on the plate. provided with a hanging bracket use, a guide member in which the engaging and the lower end opening of one of the steel pipe for guiding one of the steel tube the coaxially of the other steel pipe, the hanger bracket
A connection structure for steel pipes, wherein a stopper for reinforcing the steel pipe also serves as the guide member .