KR100739106B1 - Device shaping roundness and jointing for butting steel pipes - Google Patents

Abstract

A shaping and joining equipment for butt welding of steel pipes is provided to be constructed to be suitable for butt welding of steel pipes with small diameters by reducing the size of the entire equipment and widths of respective shapers, and improve welding quality during butt welding by easily adjusting a step height between the steel pipes in a state that both steel pipes. In a steel pipe shaping and joining equipment comprising two shapers formed as a circular body(111,112) which is openable and closeable to hold steel pipes(P) such that the shapers shape and join the steel pipes with each other after holding both steel pipes, a shaping and joining equipment for butt welding of the steel pipes is characterized in that: each of the shapers comprises shaping devices(125) projected to an inner side of the circular body to adjust a step height generated between the steel pipes when pulling and butt welding the steel pipes; the shaping device comprises a plurality of supporting plates(125B) which are projected from the circular body with being spaced from one another in a predetermined distance, and which support lower portions of the steel pipes to adjust roundness and step height of the steel pipes, and a plurality of shaping adjusting mechanisms(125A) having shaping cylinders(126) installed thereon in a predetermined distance such that the shaping cylinders move a in radius direction from the circular body and contact upper portions of the steel pipes to shape the steel pipes or adjust a step height between the steel pipes; and the shaping adjusting mechanisms comprise minute adjusting bolts(128) installed at ends of piston rods(127) of the respective shaping cylinders to minutely adjust a step height between the steel pipes.

Description

Device shaping roundness and jointing for butting steel pipes}

1 is a perspective view showing a state using the orthopedic joint of the prior invention mounted on the backhoe,

2 is a front view showing a state of gripping the steel pipe using the orthopedic joint of the prior invention,

3 is a front view showing a state in which a steel pipe is gripped by using the orthopedic joint of the prior invention,

Figure 4 is a side view showing a state before towing both steel pipes using the orthopedic joint of the prior invention,

Figure 5 is a side view showing a state after towing both steel pipes using the orthopedic joint of the prior invention,

6 is an external appearance front view of a steel pipe butt joint fitting apparatus according to the present invention, a view showing a state of holding a steel pipe,

Figure 7 is a front view showing the internal configuration of the steel tube butt joint fitting device according to the present invention, a view showing a state of holding the steel pipe,

8 is a front view showing the internal configuration of the steel tube butt joint fitting device according to the present invention, a view showing a state holding the steel pipe,

Figure 9 is a side view showing a state before towing both steel pipes using the orthopedic fitting for steel pipes according to the present invention,

Figure 10 is a side view showing a state after towing both steel pipes using the orthopedic fitting for steel pipes according to the present invention,

11 is a detailed view showing an orthopedic adjustment mechanism configured in a steel pipe butt joint fitting device according to the present invention;

12A and 12B are schematic cross-sectional views of the locking device provided in the steel tube butt joint fitting apparatus according to the present invention.

<Explanation of symbols for main parts of the drawings>

100A, 100B: Molding Machine 117: Locking Plate

125: shaping device 125A: shaping adjusting mechanism

125B: support plate 126: orthopedic cylinder

128: Fine adjustment bolt 128a: Pad

129: plate 129a: buffer pad

130: towing device 135: switchgear

137: connecting shaft 138: connecting plate

140: connecting device 150: locking device

151: locking cylinder 152: cam rod

155: locking pin 157: return spring

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe orthopedic device for shaping and interconnecting steel pipes, and more particularly, to a steel pipe butt fitting device capable of shaping and towing both steel pipes to allow butt welding.

Applicant automatically performs piping and welding during the construction of large steel pipes in all field conditions such as general soil section or temporary facility section, ensuring construction workability, economic efficiency, safety and quality of welded joints to maximize the durability of the piping system. Development continues.

Accordingly, the present applicant, based on the results of research and development, "method of construction of steel pipe" (Patent No. 10-0440555), "formation device of steel pipe" (Patent No. 10-0440185), "steel pipe forming joint device" (patent No. 10-0598551) has been patented.

1 to 5 is a view disclosed in Patent No. 10-0598551 of the above patent invention, with reference to this briefly about the steel pipe forming joint device as follows.

Referring to this briefly look at the orthopedic device of the steel pipe of the patent invention as follows.

FIG. 1 shows a state in which an orthopedic joint of a steel pipe is connected to a working arm R of a backhoe BH and transferred to a steel pipe to be constructed.

This steel pipe orthopedic joint is configured to be connected to each other through the connecting device 40 and the traction device 20, the two forming machine 10 is located side by side as shown in FIG.

Each shaper 10 is formed to form a circular structure when closed, as shown in Figure 2 is provided with a semi-circular body (11a) at the top, a pair of quarter-shaped body (11b) at the bottom, The pair of quarter-shaped bodies 11b are connected to the lower portion of the semi-circular body 11a by a hinge 13 to be opened and closed when coupled and separated around the steel pipe.

The opening and closing operation of the quarter-shaped body 11b is performed by the opening-closing cylinder 14 connecting between the semi-circular body 11a and the quarter-shaped body 11b.

In addition, the locking device 15 is provided at a portion where both the quarter-shaped bodies 11b abut each other so that the forming machine 10 does not open in a closed state in a circular structure.

As shown in FIG. 1, the connecting device 40 is configured to be connected to a working arm R such as a crane or a backhoe BH, as shown in FIG. 1.

The two forming machines 10 are provided with a plurality of forming devices 16 for operating a cylinder in a radial direction at regular intervals so that the roundness of both steel pipes can be shaped while holding both steel pipes P to be connected. It is provided.

Further, between the two forming machines 10, as shown in FIGS. 1 and 3, a pulling device 20 for pulling the other forming machine 10 in the state in which the fixing machine 10 is fixed to insert the other steel pipe into the other steel pipe is provided. It is provided.

The steel pipe shaping device as described above, the end portion of the steel pipe to a predetermined round shape while holding both steel pipes (P) to be connected using a plurality of shaping device (16), the traction device 20 After inserting and connecting both steel pipes by using the welding equipment equipped with a welding robot, etc. is a device made to be connected by welding the joint (PS) of the steel pipe.

However, the steel pipe forming joint device of the invention of the invention configured as described above is configured to be suitable for the steel pipe joint is inserted into and connected to the other steel pipe of one steel pipe to form a steel pipe more precisely, the step portion of both steel pipes There is a problem with adjustment.

Including the above problems, the steel pipe orthopedic device of the present invention is configured to be suitable for large diameter steel pipe joint device, there is a limit to apply to the butt joint device of small diameter steel pipe that should reduce the size and width of the entire equipment, The development of more suitable equipment for butt joint of small diameter steel pipes is required.

The present invention has been made to solve the above problems, an object of the present invention is to provide an orthopedic joint for steel pipe butt made to fit the butt joint of small diameter steel pipe by reducing the size of the entire equipment and the width of each forming machine.

In another aspect, the present invention is to provide a steel pipe butt jointing device that can improve the welding quality when butt welding by easily adjusting the step between the steel pipe in the state of the both sides of the steel pipe by forming an orthopedic device for forming the steel pipe shaping and elimination of the step. There is another purpose.

In addition, the present invention is configured to realize the locking by arranging the locking cylinder constituting the locking device in the longitudinal direction in the interior of the quarter-shaped body so that the locking operation is easily realized without reducing the width of each molding machine without protruding to the outside. Another object is to provide an orthopedic device for butt welding of steel pipes.

Steel pipe butt joint fitting device according to the present invention for realizing the above object, consisting of a circular body that can be opened and closed to hold the steel pipe, both steel pipes consisting of two forming machines to form and interconnect after gripping both steel pipes In the orthopedic device, each forming machine is provided with an orthopedic device protruding inwardly of the circular body so as to adjust the step generated between the two steel pipes when the two steel pipes are pulled butt, but the orthopedic device, A plurality of support plates are installed to protrude at regular intervals from the circular body to support the lower portion of the steel pipe, and regular cylinders moving in the radial direction from the circular body are installed at regular intervals to form the steel pipe while contacting the upper portion of the steel pipe. Consists of a plurality of orthopedic adjustment mechanism for adjusting the step It is characterized by.

The shaping adjustment mechanism is preferably provided with a fine adjustment bolt to fine-tune the step between the two steel pipes at the piston rod end of each of the shaping cylinder.

The support plate or the shaping adjustment mechanism is preferably provided with a shock absorbing member at the end portion in contact with the steel pipe to prevent scratches or the like in the steel pipe.

The circular body may be configured by the upper body of the semi-circular structure and both quarter-shaped body rotatably coupled to both sides of the upper body to enable the gripping operation of the steel pipe.

At this time, the support plate is provided in the quarter-shaped body, the shaping adjustment mechanism is preferably provided in the upper body.

In addition, the plate forming the upper body and both quarter-shaped body is configured in the same plane, the connecting plate is installed on any one of the upper body and both quarter-shaped body, in the state in which the connecting plate extends in the relative body direction It is preferred that they are interconnected by the connecting shaft.

The connecting shaft is installed to be located on the inner circumferential surface side of the circular body, the plate forming the upper body and the quarter-shaped body, the convex and concave structure so that the parts in contact with each other around the connecting shaft does not interfere during the quarter-shaped body rotation operation It is formed so that the distance between the two plates in the direction of the outer circumferential surface of the circular body gradually in contact with the convex and concave structure, so as to contact each other when the two quarter-shaped body is opened more than a certain interval, stopper action It is desirable to be.

In addition, the circular body is preferably formed so that the outer both sides of the portion where the upper body and the quarter-shaped body is interconnected so that the width in the horizontal direction can be minimized to go further in the circular structure.

A locking device is provided at a portion where the two quarter-type bodies overlap each other so that the interconnection is not released. The locking device is installed in one quarter-type body and the other quarter-type body. A locking plate overlapping the die-shaped body, a direction switching means for switching the linear motion of the locking cylinder in the vertical direction, and a locking pin inserted into the locking hole of the opposite locking plate while being opened to both sides by the direction switching means. It is preferable to be configured.

Here, the direction switching means is a cam rod which is connected to the piston rod of the lock cylinder, the relatively thin portion and the thick portion are continuously formed and open the lock pin to both sides while moving forward and backward according to the operation of the lock cylinder. It is preferred to be configured.

And the locking device further comprises a return spring for releasing the locking by moving the locking pin in the opposite direction in which the locking cylinder acts.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

6 to 8 is a front view of the orthopedic fitting for steel pipes according to the present invention, Figures 6 and 7 is a front view showing the external appearance and the internal configuration before holding the steel pipe, Figure 8 is a steel pipe gripping It is a front view which shows the internal structure of the after.

9 and 10 are side views of the butt joint device for butt joints according to the present invention, Figure 8 is a side view showing a state before towing both steel pipes, Figure 9 is a side view showing a state after towing both steel pipes.

Orthopedic fitting for steel pipe butt according to the present invention, the equipment for shaping and towing interconnected small-diameter steel pipes having a diameter of about 500mm used in the waste conveying pipeline, etc. to enable butt welding. Such a device of the present invention is not necessarily applied only to small diameter steel pipes, as a general steel pipe joint equipment, of course, can be widely applied.

In addition, the steel pipe to which the apparatus of the present invention is used has a structure (CP) chamfered by a beveler or the like so that the parts to be joined to each other can be butt welded, as shown in FIG. Steel pipe outer surface of the coating (C) can be made.

The apparatus of the present invention used to connect such a steel pipe will be described in detail with reference to the accompanying drawings.

Orthopedic fitting for steel pipe butt according to the present invention, the two forming machines (100A, 100B) consisting of a circular body (111, 112) as shown in Figure 9 so as to form a steel pipe (P), respectively, will be described below It is configured to be connected in one set by the traction device 130 and the connecting device 140.

The circular bodies 111 and 112 of each of these forming machines 100A and 100B are coupled to both the upper body 113 and the upper body 113 of a semi-circular structure, as shown in FIGS. Both quarter-shaped bodies 114 and 115 formed are assembled to each other.

That is, the upper body 113 is divided into a size of about 1/2 in a circular structure, the quarter-shaped body (114, 115) is divided into a size of about 1/4, and assembled together to hold the circumference of the steel pipe (P) It will form a circular structure.

Both quarter-shaped bodies 114 and 115 are connected to the upper body 113 through a connecting shaft 137 and rotated so as to form a circle when the forming machine 100A and 100B is closed as shown in FIG. It is configured to open to both sides as shown in Figs. 6 and 7 at the time of opening, such as when inserted around the (P).

Next, when coupled between the upper portion of the body 113 and the connecting portion of the quarter-shaped body (114,115) around the steel pipe (P), the opening and closing cylinder 136 to be gathered again in the open state the quarter-shaped body (114,115) There is provided an opening and closing device 135 is included.

The opening and closing device 135 is configured to operate the opening and closing cylinder 136 so that both the quarter-shaped body (114, 115) as shown in Figs.

Here, the connecting portion of the upper body 113 and the quarter-shaped bodies 114 and 115 provided with the opening and closing device 135 will be described.

The front and rear plates forming the upper body 113 and both quarter-shaped bodies 114 and 115 are configured to form the same plane. In addition, connecting plates are installed on both outer surfaces of one of the upper bodies 113 and both of the quarter-shaped bodies 114 and 115, respectively, and the connecting plates are formed on the counterpart body (the upper part in the drawing). It is configured to be interconnected to the connecting shaft 137 in a state extending in the body (113) direction.

This configuration is configured to be suitable for the orthopedic joints of small diameter steel pipes by forming both bodies with the same width without reducing the width of either the upper body 113 or both of the quarter-shaped body (114,115).

In addition, the connecting shaft 137 is installed to be located on the inner circumferential surface side of each of the circular body (111, 112), both plates forming the upper body 113 and the quarter-shaped body (114, 115), the connection shaft 137 as the center The round contact surface 139a is formed to contact the convex and concave structures so that the portions in contact with each other do not interfere with the operation of the quarter-shaped bodies 114 and 115.

In addition, in the direction of the outer circumferential surface of the circular bodies 111 and 112 at the round contact surface 139a, the distance between the two plates is gradually increased, and when the two quarter-shaped bodies 114 and 115 are opened to both sides, they are mutually contacted. Stopper surface (139b) is provided so as not to open any more.

In addition, the circular bodies 111 and 112 have been removed such that both sides of the outer side of the portion where the upper body 113 and the quarter-shaped bodies 114 and 115 are interconnected so as to minimize the width in the horizontal direction enter the inside more in the circular structure. The deletion portion 139c of the structure is formed.

In the same space as the construction site where the excavation work is carried out for the steel pipe construction, the construction unit can reduce the interference between the apparatus of the present invention and the surrounding structures such as both walls that are excavated, thereby improving the constructability. The width of the trench can also be reduced.

Next, the plurality of forming apparatuses 125 for adjusting the roundness of the steel pipes P inside the circular bodies 111 and 112 and stably fixing the apparatus of the present invention to the circumferences of the forming machines 100A and 100B. ) Are configured.

In particular, the shaping device 125 is configured to be joined to the butt joint of the small diameter steel pipe, each of the forming machine (100A, 100B) to pull the two steel pipes to the butt, so as to adjust the step that occurs between the two steel pipes Protruding in the inner direction of the circular body (111,112).

The shaping device 125 has a plurality of support plates 125B installed to protrude at regular intervals from the circular bodies 111 and 112 to support lower portions of the steel pipes P, and radial directions from the circular bodies 111 and 112. The orthopedic cylinders 126 moving to each other are installed at regular intervals, and are configured with a plurality of orthopedic adjustment mechanisms 125A for contacting the upper portion of the steel pipe and shaping the steel pipe or adjusting the step.

In this case, the support plates 125B are provided on both of the quarter-shaped bodies 114 and 115, respectively, and the shaping adjustment mechanisms 125A are provided on the upper body 113, respectively.

The support plate 125B includes a plate 129 elongated along a length direction of the steel pipe, and is fixedly installed between both plates forming the quarter-shaped bodies 114 and 115. Of course, the protruding height of the support plates 125B is set to be able to adjust the lower roundness and the step of the steel pipe while supporting the lower portion of the steel pipe P when the roundness is adjusted through the orthopedic adjustment mechanism 125A located at the top.

At the end of the support plate 125B, a buffer pad 129a is installed on the surface of the plate 129 that is in contact with the steel pipe. The buffer pad may be made of solid silicone or a fiber material used as a belt material. .

The orthopedic adjustment mechanism 125A is configured to automatically mold both steel pipes first, and then rotate the fine adjustment bolt 128, which will be described later manually, with a tool such as a spanner to finely adjust the step between both steel pipes. .

As shown in detail in FIG. 11, the shaping adjustment mechanism 125A has a shaping cylinder 126 installed in the upper body 113, and the shaping cylinder 126 has a piston in a radial direction, that is, in the outer surface direction of the steel pipe. The rod 127 is configured to protrude. In particular, the end of the piston rod 127 is provided with a fine adjustment bolt 128 to fine-tune the step between the two steel pipes.

Fine adjustment bolt 128 is mounted in a manner that is screwed to the piston rod 127 as shown in detail in Figure 11 is configured so that the head contacts the surface of the steel pipe. Of course, a portion of the head contacting the surface of the steel pipe may be configured by installing a pad 128a, such as a buffer pad 129a, installed on the support plate 125B.

On the other hand, the support plate 125B and the shaping adjustment mechanism 125A as described above are preferably configured to be arranged one by one about 18 degrees around the steel pipe, and thus the support plate 125B and the shaping adjustment mechanism 125A. The reason why they are densely arranged is that the butt welding requires fine adjustment of the entire part so that the step of the butt part of each of the steel pipes P is less than 3 mm.

Next, a traction device 130 is provided between the two molders, i.e., both circular bodies 111 and 112, and the traction device 130 connects both steel pipes P to both molders 100A and 100B as shown in FIG. 10 is a device for pulling and connecting one steel pipe so that both steel pipes P are connected to each other in a state in which they are connected to each other as shown in FIG. 10 in a gripped state. Both steel pipes (P) are configured to be mutually matched. Of course, on both sides of the traction cylinder 131 is provided with a traction guide rod 132 to connect both circular bodies (111, 112) to each other and to guide linear movement during the traction operation.

Next, a connection device 140 is provided to connect a lifting device such as a crane or a backhoe to the upper portions of both the forming machines 100A and 100B.

The connecting device 140 is composed of a plurality of connecting links (142, 143) so as to be folded and unfolded in accordance with the distance adjustment of the two forming machines (100A, 100B) as in the traction operation, the both forming machines (100A, Is installed between the 100B, the connection ring 142, 143 consists of a configuration provided with a connecting ring 144 so that the external lifting device can be connected to the central portion.

Here, the plurality of connection links 142 and 143 are connected to the link brackets 141 fixed to the outer surfaces of both the forming machines 100A and 100B.

As described above, in the connecting device 140 having the link structure, the two steel pipes P are gripped through the forming machines 100A and 100B, respectively, using the traction device 130 as described above. As shown in Figure 10 is to be configured to be naturally folded in the process of pulling both the forming machine (100B) so that both steel pipes (P) to each other.

Next, the opposite ends of the two quarter-shaped bodies 114 and 115 are configured with a locking device 150 to prevent the interconnection from being released.

This locking device 150 is preferably configured to be locked by the hydraulic pressure, the configuration thereof will be described with reference to Figs. 12A and 12B mainly. Reference Figures 12a and 12b is a diagram illustrating a schematic configuration, it can be implemented by various modifications according to the design conditions, as a basic structure of course. In addition, only one structure is shown among both the shaping machines 100A and 100B, and both shaping machines are comprised similarly.

The locking device 150 is a locking pin 155 when the locking cylinder 151 installed in the one quarter body 114 operates while the one quarter body 114 and the locking plate 117 are overlapped with each other. ) Is protruded to both sides and is configured to be locked while passing through both of the locking holes 114a and 117a overlapping each other.

That is, the locking device 150 is a locking cylinder 151 provided in one quarter-shaped body 114, direction switching means for switching the linear movement of the locking cylinder 151 in the vertical direction, and the direction switching means. It is composed of both locking pins 155 inserted into both locking holes 117a of the mating locking plate 117 by being opened to both sides.

Here, the direction switching means is composed of a cam rod 152 connected to the piston rod 127 of the lock cylinder 151, the cam rod 152 is a relatively thick portion from a relatively thin portion Is formed to be connected, it is configured to move the locking pin 155 while linearly moving according to the operation of the locking cylinder 151.

In addition, the locking pin 155 is mounted around the guide pin 154 and configured to be opened to both sides by a relatively thick portion when the cam rod 152 is advanced. In addition, a return spring 157 is provided between the locking pin 155 and the guide pin 154 to release the locking by moving the locking pin 155 in the opposite direction in which the locking cylinder 151 acts.

In addition, the cam rod 152 is formed in a fork-shaped structure in which the center portion is split as shown in FIGS. 6 to 8 to enable forward and backward movement in the state coupled to the guide pin 154.

Referring to the operation structure of the locking device as described above, as shown in FIG. It is a state. In this state, as shown in FIG. 10B, when hydraulic pressure is provided to the locking cylinder 151 in a state where one quarter-shaped body 114 and the other locking plate 117 are overlapped with each other, the cam rod 152 is provided. In this case, both locking pins 155 are opened while being inserted through the locking holes 117a by the relatively thick portion of the cam rod 152.

Such a locking device 150 of the present invention, when the device of the present invention is mainly used for the butt joint of small diameter steel pipe, the width of the quarter-shaped body (114, 115) of each forming machine (100A, 100B), the body It is difficult to install a cylinder that operates in the width direction of the.

Therefore, like the locking device 150 of the present invention, the locking cylinder 151 is disposed in the longitudinal direction of the quarter-shaped body 114, and the direction is changed by 90 degrees so that the driving force of the cylinder is transmitted to the locking pin 155 for locking. Since the operation is configured to be made, the locking operation can be easily made even in a state in which the width of each forming machine (100A, 100B) is minimized.

In addition, the locking device 150 is configured so that the locking pin 155 is protruded to both sides from the inside of the shaper (100A, 100B) without protruding to the outside, so that the outer surface of the equipment is not only simple but overall configuration This simplicity has the advantage of minimizing the jamming part when using the equipment and beautiful appearance.

Steel pipe butt shaped joint device according to the present invention configured and acted as described above, there is an advantage suitable for the butt joint of small diameter steel pipe by reducing the size of the entire equipment and the width of the left and right (steel pipe longitudinal direction) of each forming machine.

In particular, the present invention is because the lower support plate and the upper orthopedic cylinders are arranged in close proximity to each other, and the fine adjustment bolt that can be finely adjusted is configured to uniformly shape all parts of the butt joints of both steel pipes, There is an advantage that can improve the welding quality during the butt welding to be solved afterwards.

In addition, the present invention is configured to realize the locking by placing the lock cylinder constituting the locking device in the longitudinal direction in the interior of the quarter-shaped body to realize the locking operation easily without reducing the left and right width of each molding machine without protruding to the outside There is an advantage to this.

Claims (10)

In the steel pipe shaping device consisting of two forming machines made of a circular body that can be opened and closed to hold the steel pipe to form and interconnect after holding both steel pipes, Each of the forming machines is provided with an orthopedic device protruding inwardly of the circular body to adjust the step that occurs between the two steel pipes when towing the two steel pipes, but the two orthopedic devices, the orthopedic device is a certain distance from the circular body A plurality of support plates are installed to protrude every time to support the lower portion of the steel pipe while adjusting the roundness and the step of the lower steel pipe, and regular cylinders moving radially from the circular body at regular intervals, A plurality of shaping adjustment mechanism for shaping the steel pipe or adjusting the step while in contact, The orthopedic fitting device is a butt joint for steel pipe butt, characterized in that the fine adjustment bolt is provided to fine-tune the step between the two steel pipes at the end of the piston rod of each of the orthopedic cylinder. The method according to claim 1, The circular body, the upper body of the semi-circular structure, and both the quarter-shaped body rotatably coupled to both sides of the upper body through the connecting shaft to enable the gripping operation of the steel pipe is composed of mutually assembled, Where the two quarter-shaped body overlap each other is provided with a locking device to prevent the interconnection is released, The locking device includes a locking cylinder provided in one quarter body, a locking plate installed in the other quarter body and overlapping with the quarter body, and direction switching means for switching the linear movement of the locking cylinder in the vertical direction; And a locking pin inserted into the locking hole of the opposite locking plate while being opened to both sides by the direction switching means. The method according to claim 1 or 2, The support plate or the orthopedic fitting mechanism is a butt joint for steel pipe butt, characterized in that a shock absorbing member is installed at the end portion in contact with the steel pipe to prevent scratches or the like in the steel pipe. The method according to claim 1 or 2, The circular body is composed of a semi-circular upper body and both quarter-shaped bodies rotatably coupled to both sides of the upper body to enable gripping operation of the steel pipe, The support plate is provided in the quarter-shaped body, and the orthopedic adjustment mechanism is provided for the steel pipe butt joint, characterized in that provided on the upper body. The method according to claim 1 or 2, The circular body, the upper body of the semi-circular structure, and both the quarter-shaped body rotatably coupled to both sides of the upper body through the connecting shaft to enable the gripping operation of the steel pipe is composed of mutually assembled, The plate constituting the upper body and both the quarter-shaped body is configured in the same plane, the connection plate is installed on any one of the upper body and both quarter-shaped body, the connection plate is extended in the direction of the relative body Orthopedic fitting for steel pipe butt, characterized in that interconnected by a connecting shaft. The method according to claim 5, The connecting shaft is installed to be located on the inner peripheral surface side of the circular body, The plate constituting the upper body and the quarter-shaped body is in contact with the convex and concave structure so that the parts in contact with each other around the connecting shaft do not interfere during the operation of the quarter-shaped body, and the circular body in the part in contact with the convex and concave structure Formed so that the distance between both plates in the direction of the outer circumferential surface of the, gradually forming a stopper action for the butt joint, characterized in that configured to contact each other when the two quarter-shaped body is more than a predetermined distance apart. The method according to claim 2, The turning means is connected to the piston rod of the lock cylinder, and a relatively thin portion and a thick portion are formed in succession is composed of a cam rod to open the lock pin to both sides while moving forward and backward according to the operation of the lock cylinder Orthopedic fitting for steel pipe butt, characterized in that. The method according to claim 2 or 7, And the locking device further comprises a return spring for releasing the locking by moving the locking pin in the opposite direction in which the locking cylinder acts. delete delete

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