KR101811002B1

KR101811002B1 - Connection apparatus of steel pipe for strut

Info

Publication number: KR101811002B1
Application number: KR1020150135389A
Authority: KR
Inventors: 황문삼
Original assignee: 주식회사 스틸텍; 황문삼
Priority date: 2015-09-24
Filing date: 2015-09-24
Publication date: 2018-01-09
Also published as: KR20170036920A

Abstract

Which can be applied both to a round steel pipe and a bracket connection of a square steel pipe, and to easily and easily connect two steel pipes on the spot by compensating manufacturing tolerances and construction errors due to outer diameter errors when the steel pipes are connected to each other. The connecting device is started. The present invention relates to a steel pipe connecting apparatus for connecting two steel pipes to each other, wherein a plurality of connecting plates are arranged along a circumferential outer surface of two steel pipe opposite ends positioned on the same line by a hinge And a fastening portion for fastening the circumferential ends of the connection body portion to each other.

Description

TECHNICAL FIELD [0001] The present invention relates to a steel pipe connecting device for a steel pipe,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe connecting device for a strut bracket, and more particularly to a steel pipe connecting device for a strut bracket used for interconnecting a plurality of steel pipes for supporting a belt web of the earth retaining wall.

Generally, the ground is pushed up to construct the underground building basement, basement or concrete wall of the construction site, and the excavation works to prevent the collapse due to the earth pressure.

This soil-retaining work is a method of forming a soil wall supporting an irregular surface on an H-shaped section of the H-shaped section of the ground at predetermined intervals, a plurality of band sections being provided on one side of the H- Steel strut braces are installed at regular intervals.

In case of using a steel pipe strut as a strut, it is necessary to interconnect steel pipes. In the past, due to the closed cross-sectional shape of the steel pipe, the steel pipe strut was connected to each other through welding. However, There is a drawback in that it takes a lot of time, and there is a problem in securing the connection strength due to the stress generated in the welding portion. Therefore, various kinds of steel pipe connection structures have been developed and used. As such a steel pipe connection structure, a structure in which upper and lower connection pipes are mounted on outer surfaces of two steel pipe connection parts and then fastened with bolts is used.

However, the conventional steel pipe connection structure is to be manufactured in various shapes and sizes according to the outer shape and outer diameter of the steel pipe to be connected. For example, when the steel pipe connection structure is applied to the connection of two round steel pipes, it is required to be formed into a cylindrical shape corresponding to the outer shape and size of the round steel pipe. In case of applying to the connection of two square steel pipes, It shall be made in the shape of a rectangular tube so as to correspond to the size of the tube. Therefore, the steel pipe strut connection structure has to be separately manufactured in various shapes and sizes according to the outer shape and the outer diameter of the steel pipe, and thus the manufacturing cost is increased.

In addition, when the outer diameter of the steel pipe connection structure is different from the outer diameter of the steel pipe, manufacturing tolerances and construction errors due to the outer diameter error are generated on the steel pipe connection portion.

Korean Patent Publication No. 10-2011-0018581

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing a steel pipe which can be applied to a bracket connection of a round steel pipe and a square steel pipe and which can compensate manufacturing tolerances and construction errors due to outer diameter errors, And to provide a steel pipe connecting device for a strut bracket which can be connected to the steel pipe connecting device.

According to another aspect of the present invention, there is provided a steel pipe connecting device for connecting two steel pipes to each other, the steel pipe connecting device comprising: A plurality of connecting plates continuously connected to each other along a direction outer surface by a hinge so as to surround the connecting body in correspondence with the outer shape of the steel pipe; And a fastening portion for fastening both ends of the connection body portion in the circumferential direction.

In addition, the connecting plate is formed in a rectangular shape, at least one hinge coupling protrusion having a hinge hole at one side of the connecting plate in the connection direction, at least one hinge coupling groove having a hinge hole at the other side is formed, The hinge coupling protrusion formed on one of the coupling plates is inserted into the hinge coupling groove formed in the adjacent coupling plate and the hinge pin is inserted through the hinge hole so that a plurality of coupling plates can be pivotable about the hinge pin Lt; / RTI >

The connection body may be formed to surround the plurality of connection plates along the outer surface of the round steel pipe or the square steel pipe in a cylindrical or rectangular tube shape.

Further, the fastening portion may include a pair of fastening portions, each of which is bent at both ends in the circumferential direction of the connecting body portion, and has at least one bolt hole formed therein; And a fastening bolt inserted into the bolt hole and fastening a pair of the fastening pieces.

The connecting body portion is disposed so as to surround the two steel pipe connecting portions. When the connecting bolt is inserted into the bolt hole and is fastened while a pair of the fastening pieces are spaced apart from each other at a predetermined interval, So that the connection body portion presses the outer surface of the connection portion of the steel pipe.

In addition, at least one or more connecting bodies may be provided along the circumferential direction of the outer surface of the connecting portion of the steel pipe, and the connecting portion may be provided to at least one or more than one of the connecting body portions.

The steel pipe connecting device of the present invention has the following effects.

First, according to the present invention, a plurality of connecting plates are continuously connected by hinges so as to be enclosed in correspondence with outer shapes of two steel pipe connecting portions, so that the present invention can be applied to both stranded steel pipes and square steel pipes.

Second, according to the present invention, the fastening bolt is configured to press the connecting portion of the steel pipe by applying a certain pressure to the space where the fastening bolt is spaced apart, thereby compensating the manufacturing tolerance and construction error due to the outer diameter error, Simple and easy to connect.

1 is a perspective view showing a state in which two circular steel pipes are connected using a steel pipe connecting device for a paddle boat according to a preferred embodiment of the present invention;
2 is a perspective view of a steel pipe connecting apparatus for a paddle boat according to a preferred embodiment of the present invention.
3 is a side view of Fig.
Fig. 4 is an exploded perspective view of part A of Fig. 2; Fig.
FIG. 5 is a cross-sectional view showing an embodiment in which a steel pipe connecting device of a strut bracket applied to the circular steel pipe of FIG. 1 is composed of two connecting body portions and a fastening portion.
FIG. 6 is a perspective view showing a state in which two rectangular steel pipes are connected using a steel pipe connecting device for a strut in accordance with a preferred embodiment of the present invention. FIG.
Figure 7 is a side view of Figure 6;
FIG. 8 is a cross-sectional view showing an embodiment in which a steel pipe connecting device for a square steel pipe of FIG. 6 is composed of two connecting body parts and a fastening part;
9 is a view for explaining a method of connecting two steel pipes using a steel pipe connecting device according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

FIG. 1 is a perspective view showing a state in which two circular steel pipes are connected using a steel pipe connecting device for a paddle boat according to a preferred embodiment of the present invention, and FIG. 2 is a perspective view of a steel pipe connecting device for a paddle boat according to a preferred embodiment of the present invention. Fig. 3 is a side view of Fig. 1, and Fig. 4 is an exploded perspective view of a portion A of Fig.

The steel pipe connecting device 100 according to the present invention is applied to a steel pipe strut that is used for earth retaining work where earth excavation is carried out for construction of civil engineering and building structures and comprises a plurality of steel pipes 10 for supporting a belt portion of the earth retaining wall ). &Lt; / RTI >

As shown in FIGS. 1 to 4, two circular steel pipes 10 can be connected using the steel pipe connecting device 100 of the present invention. The steel pipe connecting device 100 for a strut can include a connecting body portion 110 and a fastening portion 120.

A plurality of connecting plates 111 are continuously connected by a hinge along the circumferential outer surface of the opposite end portions 10a of the two circular steel pipes 10 positioned on the same line to form the circular steel pipe 10, So as to cover the outer shape of the cylinder.

The connecting plate 111 is formed of a rectangular plate having a length in the longitudinal direction of the round steel pipe 10. In the present embodiment, the connecting plate 111 is rectangular, but the present invention is not limited to this, and the connecting plate 111 may have various shapes.

The length of the connecting plate 111 is formed to be long enough to support the outer surfaces of the connecting portions of the two circular steel pipes 10 in the longitudinal direction. The width of the connecting plate 111 is small, So that the connection plate 111 is wrapped around the circular steel pipe 10 in correspondence with the outer shape of the circular steel pipe 10.

In addition, it is preferable that the thickness of the connecting plate 111 is formed thicker than the thickness of the steel pipe, so that the connecting plate 111 has sufficient strength to prevent deformation against buckling and buckling on the connecting portions of the two steel pipes.

The connecting plate 111 is formed with curved surfaces 111a on both sides of the connecting plate 111 to prevent interference with the adjacent connecting plate 111 when the connecting plate 111 is rotated by the hinge.

At least one hinge coupling protrusion 113 having a hinge hole 113a is formed at one side of the coupling plate 111 and at least one hinge coupling slot 115 having a hinge hole 115a at the other side . Here, the hinge holes 113a and 115a are formed in a direction parallel to the longitudinal direction of the connection plate 111. [

The outer end of the hinge coupling protrusion 113 and the inner end of the hinge coupling recess 115 are curved to prevent mutual interference when the connection plate 111 is rotated by the hinge. In this embodiment, two hinge coupling protrusions 113 and two hinge coupling protrusions 115 are formed on the coupling plate 111, but the present invention is not limited to this, and one or two or more hinge coupling protrusions 113 may be formed.

The hinge coupling protrusion 113 formed on one of the plurality of coupling plates 111 is inserted into the hinge coupling recess 115 formed in the adjacent coupling plate 111 and the hinge pin 112 Are inserted to penetrate the hinge holes 113a and 115a so that a plurality of connecting plates 111 are pivotally coupled with the hinge pin 112 as a center.

The fastening part 120 fastens both ends of the connecting body part 110 in the circumferential direction. The fastening part 120 may include a fastening piece 121 and a fastening bolt 123.

The fastening pieces 121 are formed so as to be bent at both ends in the circumferential direction of the connection body 110, respectively. For example, the fastening pieces 121 may be formed in the shape of a rectangular plate extending in a direction perpendicular to the longitudinal direction of the connection plate 111 by extending at right angles to the connection plate 111 located at both ends of the connection body portion 110 have.

In addition, a plurality of bolt holes 122 are formed in the fastening piece 121 with a predetermined gap G in the longitudinal direction. It is preferable that the bolt hole 122 is subjected to the overhang treatment so as to correspond to the steel pipe size error.

The fastening bolt 123 is inserted into the bolt hole 122 of the fastening piece 121 and fastened by the nut 124 to fasten the pair of fastening pieces 121. The connecting body 110 is arranged so as to surround the connecting portions of the two circular steel pipes 10 and the fastening bolts 123 are fastened in the state where the pair of fastening pieces 121 are spaced apart by a predetermined gap G, A predetermined pressure is applied to a portion where the fastening bolt 123 is fastened when the fastening bolt 123 is inserted into the hole 122 so that the connecting body 110 tightly presses the external surface of the connecting portion of the circular steel pipe 10.

FIG. 5 is a cross-sectional view showing an embodiment in which a steel pipe connecting device for a round steel pipe of FIG. 1 is composed of two connecting body parts and a fastening part.

As shown in FIG. 5, at least two connection body portions 110 may be provided along the circumferential direction of the connection portion of the circular steel pipe 10. In addition, the fastening part 120 may be provided at two or more to fasten both ends of the two or more connecting body parts 110.

FIG. 6 is a perspective view showing a state in which two rectangular steel pipes are connected using a steel pipe connecting device for a strut in accordance with a preferred embodiment of the present invention, and FIG. 7 is a side view of FIG.

6 and 7, two rectangular steel pipes 20 can be connected by using the steel pipe connecting device 100 for a stranded pipe of the present invention. The steel pipe connecting device 100 for a strut can include a connecting body portion 110 and a fastening portion 120.

A plurality of connecting plates 111 are continuously connected by a hinge along a circumferential outer surface of two opposing end portions 20a of the square steel pipes 20 located on the same line to form a rectangular steel pipe 20, So as to be enclosed in a rectangular tube shape.

The connecting plate 111 is formed of a rectangular plate having a length in the longitudinal direction of the square steel pipe 20. [ The connecting plate 111 is formed as a curved surface 111a (see FIG. 4) on both sides of the connecting plate 111 to prevent interference with the adjacent connecting plate 111 when the hinge rotates.

4) having a hinge hole 113a (see FIG. 4) is formed on one side of the connection plate 111 and a hinge hole 115a (see FIG. 4) is formed on the other side. At least one hinge engagement groove 115 (see Fig. The hinge coupling protrusion 113 formed on one of the plurality of coupling plates 111 is inserted into the hinge coupling recess 115 formed in the adjacent coupling plate 111 and the hinge pin 112 Are inserted into the hinge holes 113a and 115a so that a plurality of connecting plates 111 are rotatably coupled with the hinge pin 112 as a center.

The fastening part 120 is composed of a fastening piece 121 and a fastening bolt 123 to fasten both ends of the connecting body part 110 in the circumferential direction. The connecting body 110 is arranged so as to surround the connecting portions of the two square steel pipes 20 and the fastening bolts 123 are fastened in a state in which the pair of fastening pieces 121 are spaced apart by a predetermined gap G. [ A predetermined pressure is applied to a portion where the fastening bolt 123 is fastened when the fastening bolt 123 is inserted and fastened to the bolt hole 122 formed in the piece 121 so that the connecting body portion 110 closely contacts the outer surface of the connecting portion of the rectangular steel pipe 20 And pressurized.

8 is a cross-sectional view illustrating an embodiment in which a steel pipe connecting device for a square steel pipe of FIG. 6 is composed of two connecting body portions and a fastening portion.

As shown in FIG. 8, the connecting body portion 110 may be provided in two or more along the circumferential direction of the connecting portion of the square steel pipe 20. [ In addition, the fastening part 120 may be provided at two or more to fasten both ends of the two or more connecting body parts 110.

The steel pipe connecting device 100 according to the present invention is applied to a strut pile used for earth retaining work where soil excavation is carried out for the construction of civil engineering and building structures and comprises a plurality of steel pipes for supporting the belt of the earth retaining wall It is used to interconnect.

A method of connecting two steel pipes using the steel pipe connecting apparatus 100 of the present invention having the above-described structure will now be described. In the present embodiment, a circular steel pipe is exemplified and a rectangular steel pipe is similarly applied, so that a detailed description thereof will be omitted.

As shown in FIG. 9, first, the connecting body portion 110 is disposed so as to surround the outer circumferential surface of the upper end of one of the two steel pipes 10 to be connected, and then the bolt 302 is fastened When the end of one steel pipe is connected, the connecting body portion 110 is disposed so as to surround the outer circumferential surface, and then the bolt 302 is fastened. At this time, the plurality of connection plates 111 constituting the connection body 110 are rotated in the circumferential direction by the hinge, so that the connection body 110 is formed into a cylindrical shape corresponding to the outer shape of the circular steel pipe 10, Respectively. The bolts 302 penetrate the bolt holes 301 formed in the circumferential direction of the connecting plate 111 so as to be separated from each other by a predetermined distance in the circumferential direction.

Next, the two steel pipes 10 are positioned in the same line, and the two steel pipe opposite ends are brought into alignment with each other.

Finally, a pair of fastening pieces 121 formed at both ends of the connecting body 110 are spaced apart from each other by a predetermined distance, and the fastening bolts 123 are inserted into the bolt holes 122 and fastened. At this time, since the fastening bolt 123 is configured to apply a certain pressure to the fastening portion by the spaced gap G, the manufacturing tolerance and the construction error due to the outer diameter error at the connection portion of the steel pipe are compensated, Simple and easy to connect in the field.

The plurality of connecting plates 111 are continuously connected to each other by hinges so as to be wrapped in correspondence with the outer shape of the two steel pipe connecting portions so that they are all applied to the strut connection of the round steel pipe 10 and the square steel pipe 20. [ can do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. You will understand. It is therefore to be understood that the embodiments described above are in all respects illustrative and not restrictive. It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10: round steel pipe 20: square steel pipe
100: Steel pipe connection device for strut bracket 110: Connection body
111: connecting plate 112: hinge pin
113: hinge coupling protrusion 115: hinge coupling groove
120: fastening part 121: fastening piece
123: fastening bolt

Claims

1. A steel pipe connecting device for connecting two steel pipes to each other,
A connecting body portion formed so as to surround a plurality of connecting plates continuously along the circumferential outer surfaces of the two opposite end portions of the steel pipe lines positioned on the same line and to be continuously connected by hinges to cover the outer shape of the steel pipe; And
And a fastening part for fastening both circumferential ends of the connection body part,
The connection body is formed to surround a plurality of the connection plates along the outer surface of the round steel pipe or the square steel pipe in a cylindrical or rectangular tube shape,
The connection plate is formed in a rectangular shape, at least one hinge coupling protrusion having a hinge hole at one side of a connection direction of the connection plate is formed, at least one hinge coupling groove having a hinge hole at the other side is formed, The hinge coupling protrusion formed on one of the coupling plates is inserted into the hinge coupling groove formed in the adjacent coupling plate and the hinge pin is inserted through the hinge hole so that a plurality of coupling plates are rotatably coupled However,
Wherein the outer end of the hinge coupling protrusion and the inner end of the hinge coupling recess are curved to prevent mutual interference when the connection plate is rotated by the hinge.

delete

The method according to claim 1,
The fastening portion
A pair of fastening bends extending in the circumferential direction at both ends of the connection body portion and having at least one bolt hole; And
And a fastening bolt inserted into the bolt hole and fastening a pair of the fastening pieces.

5. The method of claim 4,
The connecting body portion is disposed so as to surround the two steel pipe connecting portions. When a pair of the connecting pieces are spaced apart from each other by a predetermined distance and the connecting bolt is inserted into the bolt hole and is fastened, So that the connection body presses the outer surface of the connection part of the steel pipe.

The method according to claim 1,
Wherein at least one or more connecting bodies are provided along a circumferential direction of a connecting portion of the steel pipe and at least one or more connecting portions are provided to fasten the both ends of the connecting body portion.