KR101149871B1 - Device for shaping roundness of inside-joint portions of steel pipes - Google Patents

Abstract

The internal forming apparatus for connecting the steel pipe according to the present invention includes a traveling device provided in the center frame to travel the inside of the steel pipe, and is provided around the center frame so as to be held in close contact with the inner surfaces of both steel pipes, and at the same time, both steel pipe connecting parts Is provided between the two forming devices for forming each, the towing device to pull the two steel pipes in close contact with each other or to face each other, the back support to support the welding of the external steel pipes in close contact with the inner surface of the connection portion of both steel pipes between the two forming devices It is configured to include a device, it is put into the inside of the steel pipe to form a steel pipe, to be configured to support both the inner pipe connecting portion in the state to pull the two steel pipes to each other to promote the convenience and speed of the steel pipe connection work. Provide effect.

Description

Device for shaping roundness of inside-joint portions of steel pipes}

The present invention relates to a steel pipe internal forming apparatus used to connect large steel pipes in series.

Applicant has developed and applied for a patent for 'Steel Pipe Construction Method' to improve the workability, economy and safety by automatically conducting piping and welding when constructing large steel pipes of 600mm or more. It was patented under the registration number 10-0440555.

Then, the Applicant separates the outer welder from the steel pipe forming machine, and proceeds with the construction of the steel pipe by using the forming machine and the outer welder separately, thereby greatly shortening the preparation time as well as the construction time and cleanup time, and independent mechanisms. In addition, the company has applied for patents by developing a 'steel pipe construction method' that can secure construction expertise and achieve superior construction performance by allowing the construction to be carried out separately, and was patented by the Korean Patent Office under the registration number 10-0847547. .

The applicant's patented inventions have the effect of greatly improving workability, economical efficiency, safety, etc. by automatically performing pipe installation work and welding connection work during the construction of large steel pipes.

However, including the applicant's patented inventions, conventionally, after performing the external shaping of the steel pipe, there is a problem in simplifying the method of connecting the steel pipe construction by two welding operations because the welding of the outer surface and the inner surface of the steel pipe connecting portion, respectively.

In particular, there is a demand for the development of a technology capable of simplifying the static welding operation while applying to the butt steel pipe connection method in which both steel pipes face each other.

The present invention has been made in order to solve the above problems, it is put into the inside of the steel pipe to form a steel pipe, by structuring both steel pipes to be configured to support the inner surface of both steel pipe connecting portion in a state of mutual contact convenience of steel pipe connection work And it is an object to provide an internal forming device for connecting the steel pipe to facilitate rapidity.

In particular, the present invention is configured to enable the pulling operation of both steel pipes, and also to support the support plate of the back support device in the inclined direction by expanding both sides of the steel pipes in a fast state, the support operation for the external welding An object of the present invention is to provide an internal forming device for connecting the steel pipe can be made smoothly and simply.

In accordance with an aspect of the present invention, there is provided an internal forming apparatus for connecting a steel pipe, the center frame being elongated in a longitudinal direction; A traveling device provided on the center frame to travel inside the steel pipe; Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively; A traction device provided between the two orthopedic devices to pull both steel pipes to be in close contact with each other or to face each other; It is characterized in that it comprises a back support device which is in close contact with the inner surface of the connection portion of both steel pipes between the two forming devices to assist the welding of the steel pipe outer surface.

In addition, the internal shaping device for a steel pipe connection construction according to the present invention for realizing the above object, the center frame is installed long in the longitudinal direction; A traveling device provided on the center frame to travel inside the steel pipe; Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively; It is provided between the two orthopedic devices characterized in that it comprises a traction device to pull the two steel pipes to be in close contact with each other or to face each other.

In the above, the traveling device includes a travel support disposed in a three way manner around the center frame, a wheel installed at the end of the travel support and rotating along an inner surface of the steel pipe, and installed around the center frame and traveling A first driving support rotatably connected to the driving support to enable the support to be folded and unfolded about the center frame, and a slidably installed around the center frame at a position spaced apart from the first driving support; It is preferable to include a two-wheeled support, and an unfolding support connected between the second driving support and each traveling support.

Each orthopedic device is an orthopedic body installed in a disk-shaped body structure around the center frame, the inner structure of the orthopedic body is arranged in a radial structure centered around the center frame and close to the inner surface of the steel pipe while protruding outside the outer periphery of the orthopedic body. It is preferable to include a plurality of shaping pins, a push block installed in the axial direction of the center frame to push the shaping pins, and a shaping cylinder for moving the push block back and forth.

In this case, both push blocks provided in the two orthopedic devices are disposed to face each other, a push guide having an axial structure is installed between the push blocks, each guide block is inserted into the guide groove is coupled to both ends of the push guide Each may be formed.

The towing device includes a plurality of towing cylinders connected to both of the shaping devices to adjust the distance between the two shaping devices, and the center frame between the two shaping devices is connected to the outer cylinder and the inner cylinder inserted therein. It is preferable that the length of the center frame can be changed according to the change in the spacing of the shaping device.

In this case, the traction device may be provided with guide rods connected to both orthopedic devices between the traction cylinders.

The back support device, a plurality of each is disposed between each of the two orthopedic devices, both back support devices are arranged to be alternate with each other, each of the back support device, the support bracket supported by the center frame or one orthopedic device, A sliding body slidably mounted to the supporting bracket, a supporting actuator for linearly moving the sliding body in a state supported by the supporting bracket, and installed on the outer side of the sliding body to be in close contact with inner surfaces of both steel pipe connecting parts to be connected to the outside of the steel pipe connecting part. It is preferably configured to include a supporting plate for supporting the welding can be made.

At this time, the back support device, the sliding direction of each sliding body is made to slide in the inclined direction toward the inner surface of the steel pipe connecting portion, both supporting plates when the supporting plate of the back support device of both the whole is in close contact with the inner surface connection of the steel pipe Is preferably configured to form a circular band structure as a whole are alternately coupled to each other.

On the contrary, the back supporting device includes a supporting bracket supported on either one of the two orthopedic devices, a plurality of supporting support blocks disposed at regular intervals in the circumferential direction on the outside of the supporting bracket, and installed on the supporting bracket side. A plurality of supporting actuators for linearly moving the respective supporting support blocks in the radial direction, a plurality of supporting plates each slidably disposed in the longitudinal direction of the steel pipe on the supporting support blocks, and the supporting plate and the supporting support blocks, respectively. An elastic member disposed between the supporting plates to provide elasticity to the supporting plate, wherein the plurality of supporting plates are arranged such that adjacent supporting plates slide in opposite directions, and the supporting plates are entirely supported by the supporting actuators during the supporting operation.In addition, the support plates, which are opened to both sides by the elastic means, are gathered in a circular band structure and are configured to support the inner joints of both steel pipes. It may also be configured to be released to both sides and release operation.

Next, the internal shaping device for a steel pipe connection construction according to the present invention for realizing the above object, and the center frame installed in the longitudinal direction; Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively; A back support device which is in close contact with the inner surface of the connection portion of both steel pipes between the two orthopedic devices to assist welding of the outer surface of the steel pipe, wherein the back support device is disposed between a plurality of the two support devices, respectively, both back support devices Are alternately disposed, and each of the back supporting devices includes: a supporting bracket supported by the center frame or one orthopedic device; and a sliding body provided on the supporting bracket so as to slide in a direction inclined toward the inner surface of the steel pipe connecting portion; And a supporting actuator for linearly moving the sliding body in a state supported by the supporting bracket, and a supporting plate installed at an outer portion of the sliding body to be in close contact with inner surfaces of both steel pipe connecting portions to support welding from outside the steel pipe connecting portions. Consists of including both sides While as the supporting plate of the back supporting device to be in close contact with the inner surface of the steel pipe connecting the both supporting plates coupled together alternately as a whole it is characterized in that it is configured so as to form a ring-shaped zone structure.

The main problem solving means of the present invention as described above, will be described in more detail and clearly through examples such as 'details for the implementation of the invention', or the accompanying 'drawings' to be described below, wherein In addition to the main problem solving means as described above, various problem solving means according to the present invention will be further presented and described.

The internal shaping device for steel pipe connection construction according to the present invention for realizing the above problems has the following effects.

The present invention is configured to support the inner surface of both steel pipe connections in a state in which the steel pipe is inserted into the steel pipe, and the two steel pipes are pulled together to face each other, so that the convenience and speed of the steel pipe connection work can be achieved. to provide.

In particular, the present invention is configured to enable the traction operation of both steel pipes, so that welding work can be performed in a state in which both steel pipes are in close contact with each other inside the steel pipe without using other equipment in a state where the steel pipes are arranged in a line. Provides the effect of improving the convenience and workability of the connection construction work.

In addition, the present invention, since the supporting plate of the back supporting device is configured to be extended in the inclined direction, the configuration of the supporting device is made simple as well as providing an effect that the supporting operation for external welding can be made smoothly and simply. .

1 is a side configuration diagram showing a first embodiment of a steel pipe internal forming apparatus according to the present invention, showing a state before pulling both steel pipes,
Figure 2 is a side configuration view showing a first embodiment of a steel pipe internal forming apparatus according to the present invention, showing a state in which both steel pipes are towed,
3 is a detailed view of the main part of FIG.
4 is a cross-sectional view of the AA direction of Figure 1, showing the state before expansion of the shaping device and the back support device,
FIG. 5 is a cross-sectional view of the BB direction of FIG. 2, illustrating an extended state of the shaping device and the back supporting device; FIG.
6 is a front configuration diagram showing the configuration of a traveling device of a first embodiment of a steel pipe internal forming apparatus according to the present invention;
7 is a working state diagram using the steel pipe internal forming apparatus according to the present invention.
8 is a side configuration view showing a second embodiment of a steel pipe internal forming apparatus according to the present invention;
9 to 14 are views showing a third embodiment of the steel pipe internal forming apparatus according to the present invention,
9 to 11 are side configuration diagrams (FIG. 9), a main part plan detail view (FIG. 10), a main part cross-sectional detail view (FIG. 11), which show a state when the back supporting apparatus is unsupported.
12 to 14 are side configuration diagrams (FIG. 12), a main part plan detail view (FIG. 13), and a main part cross-sectional detail view (FIG. 14) showing a state during the supporting operation of the back supporting device.

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

A first embodiment of a steel pipe internal forming apparatus according to the present invention will be described.

1 and 2 is a side view showing a steel pipe internal forming apparatus according to the present invention, a view showing a state before towing both steel pipes and a view showing a state towed both steel pipes, Figure 3 4 is an enlarged view of the main part, FIG. 4 is a cross-sectional view of the AA direction of FIG. 1, showing a state before expansion of the shaping device and the back support device, and FIG. 5 is a cross-sectional view of the BB direction of FIG. Figure showing the extended state of the supporting device. And Figure 6 is a front configuration diagram showing the configuration of the traveling device of the steel pipe internal forming apparatus according to the present invention.

As illustrated in these drawings, the steel pipe internal forming apparatus 100 according to the first embodiment of the present invention includes a center frame 110 installed in a longitudinal direction and a steel pipe P provided in the center frame 110. And a traveling device 120 configured to travel inside the center, and both forming devices 130 provided around the center frame 110 so as to be held in close contact with the inner surfaces of both steel pipes and at the same time, respectively, to form steel pipe connections. A traction device 150 is provided between the two shaping devices 130 to pull the two steel pipes in close contact with each other or against each other, and between the two shaping devices 130 in close contact with the inner surface of the connecting portion of the two steel pipes to assist welding of the outer surface of the steel pipes. It is configured to include a back support device 170.

Each configuration of the steel pipe internal forming apparatus 130 will be described.

First, referring to FIGS. 1 and 2, the center frame 110 may be installed such that the driving device 120, the shaping device 130, the towing device 150, and the back support device 170 may be installed. It is configured to be long in the longitudinal direction of the steel pipe.

The center frame 110 may be formed in an elongated cylindrical structure, but may be configured in combination with the traveling device 120, the shaping device 130, the traction device 150, and the like as necessary. That is, the center frame 110 is a structure for supporting the operation so as to integrally connect the entire devices constituting the steel pipe internal forming device 100 integrally.

One side (or front) of the center frame 110 may be installed with a cover frame 116 to protect the internal structure when driving the device. As illustrated in the drawing, the cover frame 116 may be configured by arranging a plurality of members made of metal in a round cap structure, and a ring portion 117 for lifting or pulling may be installed in the center.

Next, the traveling device 120 is configured such that the steel pipe internal forming apparatus 100 of the present invention can travel along the inner surface of the steel pipe, and as shown in FIG. 6, the unit travel set having the tricycle structure is centered. It is provided in the frame 110 in multiple places. In the drawing of this embodiment shows a configuration in which the two unit running set is shown, the two unit running set is an example of the arrangement disposed on one center frame 110 toward the center of the shaping device 130 and the towing device 150 Doing.

However, the present invention is not limited thereto, and the steel pipe internal forming apparatus 100 of the present invention may travel along the inner surface of the steel pipe, and may be configured to include three or more unit travel sets, and may also include a plurality of unit travel sets. It is also possible to be configured to be disposed on both the shaping device 130 and the traction device 150.

The unit traveling set constituting the traveling device 120 will be described.

The unit travel set has a travel support 121 disposed in a three-wheeled manner around the center frame 110, and wheels 123 rotating along the inner surface of the steel pipe are installed at ends of each travel support 121. In this case, the at least one wheel 123 is preferably configured to rotate by an electric motor or the like to enable automatic driving. The electric motor may be installed at the center frame 110 so as to transmit driving force to the wheel 123 by a power transmission means such as a belt or a chain. Herein, the configuration of the electric motor and the power transmission means can be easily arranged and configured by those skilled in the art to which the present invention pertains.

The unit running set is configured such that the driving support 121 can be folded and unfolded about the center frame 110. To this end, a first driving support 125 installed around the center frame 110 and rotatably connected to the driving support 121, and a second driving support provided at a position spaced apart from the first driving support 125. 127, the second driving support 127 is formed of an extended support 128 connected to each driving support 121.

The connecting portion of the driving support 121 and the first driving support 125, the extending support 128 and the connecting support 121 and the connecting portion, the connecting portion of the extended support 128 and the second driving support 127 are It is preferable that all of them are connected freely in a link manner.

In addition, one of the first driving support 125 and the second driving support 127 may be fixed to the center frame 110 so that the driving support 121 may be folded and unfolded. It is preferably configured to be able to slide in the longitudinal direction of the (110). In this regard, a case in which the second driving support 127 is configured to slide will be described by way of example.

The center frame 110 is provided with a sliding driving device (not shown) to slide the second driving support 127. The sliding drive device is a known actuator capable of providing linear movement force such as a hydraulic actuator such as a hydraulic cylinder and an electric linear actuator so as to linearly move the second driving support 127 by providing linear movement force. You can choose to configure it. The sliding driving device is connected to the second driving support 127 in a state of being installed inside the center frame 110 and configured to slide the second driving support 127. Of course, a plurality of long slots may be formed in the center frame 110 so that the second driving support 127 and the sliding driving device are connected to each other so as not to interfere with the linear movement.

In addition, the center frame 110 may be provided with a stopper device to maintain the running support 121 is fully deployed. When the second driving support 127 is slid and the driving support 121 is fully extended or folded, the stopper may be installed to limit the movement of the second driving support 127. For example, the stopper pin installed in the center frame 110 may be configured to protrude out of the center frame 110 by a device for driving the same, thereby limiting the movement of the second driving support 127.

Even when the first driving support 125 is configured to slide, the sliding and movement limiting structure of the second driving support 127 described above may be applied in the same manner.

On the other hand, the driving support 121 is arranged in three ways, referring to Figure 6, the two driving support (121a) (121b) located below the center with respect to the center are arranged at intervals of 90 degrees, the other one The travel support 121c is disposed to be 135 degrees apart from the two travel supports 121a and 121b. Of course, the three running support (121a) (121b, 121c) may be arranged at equal intervals of all 120 degrees, but considering the load of the steel pipe forming device 100, the lower side so as to stably run and support Two traveling support (121a) (121b) is located in is preferably configured to be arranged at an angle smaller than the 120-degree intervals as in the drawing of this embodiment.

  The two orthopedic devices 130 extend in a radial structure to the center frame 110 to be in close contact with the inner surface of the steel pipe, and to hold the inner surface of the steel pipe (fixed to the inner surface), and both steel pipes may be opposed to each other. At this time, the device is shaped so that the steel pipe connection can be made in a state in which the step difference is minimized.

Both shaping devices 130 consist of two shaping devices 130A and 130B arranged side by side, and each shaping device 130 is provided in a disk-shaped body structure around the center frame 110. A plurality of orthopedic fins (131), which are arranged radially around the center frame (110) on the inner side of the orthopedic body (131), protrude out of the outer periphery of the orthopedic body (131), and adhere to the inner surface of the steel pipe ( 133, a push block 139 installed in the axial direction of the center frame 110 to push the shaping pins 133, and a shaping cylinder 142 which moves the push block 139 back and forth. .

That is, when the push block 139 is advanced by the operation of the orthogonal cylinder 142, the orthopedic pins 133 are expanded to a radial structure while being held in close contact with the inner surface of the steel pipe, and configured to be shaped will be.

Here, the shaping body 131, two discs are installed side by side at a predetermined interval is preferably installed to be fixed to the center frame 110 through a fixing bracket 132.

In addition, the inside of the shaping body 131, the shaping body 131 is preferably provided with a pin guide 131a (see Fig. 4) for guiding the shaping pins 133 to move linearly.

The shaping pin 133 is provided with a rod portion 134 which is linearly moved by the push block 139 inside the pin guide 131a, and an end portion of the rod portion 134 and has a shaping body ( It is preferably composed of an orthopedic plate 135 that protrudes outside the outer periphery of the 131 and is in close contact with the inner surface of the steel pipe.

The shaping plate 135 is a plate block 136 respectively provided at the end of the rod portion 134, and a shaping pad 137 is provided on the outer surface of the plate block 136 to be in close contact with the inner surface of the steel pipe. Can be done. At this time, the plate block 136 is preferably made of a metal plate material, the shaping pad 137 is preferably made of a material having a certain elasticity, such as leather, synthetic resin.

In this embodiment, the configuration pins 133 are all 16 is illustrated, but not limited to this configuration can be configured by varying the number according to the embodiment.

The push block 139 is configured to be able to move back and forth in the axial direction at the center of the center frame 110 by the shape cylinder 142.

In this case, the push block 139 and the shaping pin 133 are configured such that the inclined surfaces 139s (see FIG. 3) contact each other so that the shaping pins 133 simultaneously expand outward or contract inward when the push block 139 moves. It is configured to be.

The shaping pins 133 are expanded by pushing the push block 139 forward and pushed, and the structure of moving back to the original position after expansion may be configured in various ways according to the implementation conditions. For example, an elastic member (not shown) is installed between the shaping body 131 and the shaping pin 133 to use the restoring force or the inclined surface 139s between the push block 139 and the shaping pin 133. It may be made of a structure having a magnetic body to use the magnetic force of the magnetic body (not shown).

Meanwhile, the push blocks 139 of both the shaping devices 130 are disposed to face each other inside the center frame 110, and a push guide 141 having an axial structure may be installed between the two push blocks 139. have. Of course, each push block 139 is formed with guide grooves 139a (see FIG. 3) to which both ends of the push guide 141 are inserted and coupled.

The push guide 141 may be configured to be coupled to the guide groove 139a of each push block in a spline manner.

In embodiments of both shaping devices 130 as described above, shaping pins 133 radially disposed by push blocks 139 operated by one shaping cylinder 142, each shaping device 130A, 130B. ) Illustrates a configuration in which expansion and contraction operations are possible, but is not limited thereto. It is also possible to configure each of the shaping pins 133 to be operated by each shaping cylinder.

Next, the traction device 150 is installed so as to be connected between the two forming devices 130, both forming devices 130 are in close contact with the inner surface of the steel pipe gripping and shaping the steel pipe forming device 130 By narrowing the gap between the two pipes to be in close contact with each other or to be in a combined state.

The traction device 150 is composed of a traction cylinder 151 connected to both the shaping device 130, the drawing of this embodiment shows a configuration in which four traction cylinders 151 are installed at regular intervals in the circumferential direction. In addition, the guide rods 153 are also installed between the traction cylinders 151.

Traction cylinder 151 is preferably configured to enable the traction operation by hydraulic power by connecting the piston rod to the second shaping device 130B in a state fixed to one of the first shaping device (130A).

The guide rod 153 is installed so that when the two forming devices 130 are pulled by the traction cylinders 151, one shaping device 130A can be stably pulled toward the other shaping device 130B. In addition, the guide rod 153 also serves to maintain a stable connection by connecting both the forming apparatus 130 with the traction cylinders 151. To this end, one end of the guide rod 153 is fixed to the second shaping device 130B, and the other end is configured to linearly move in a state of being fitted in the guide hole 155 of the first shaping device 130A. do.

In order for the traction device 150 configured as described above to operate, the length of the center frame 110 positioned between the two shaping devices 130 must also be configured so that the center frame 110 can be changed in length. ) Consists of a divided configuration.

As illustrated in the figure, when the center frame 110 between both the forming apparatus 130 is connected to the outer cylinder 113 and the inner cylinder 112 inserted therein, the traction device 150 is operated. It can be configured to vary in length. Alternatively, although not illustrated in the drawings, it is also possible to configure one side shaping device 130 itself to slide around the center frame 110.

Next, the back support apparatus 170 will be described.

The back support device 170 is a component that supports the inner side of the connecting portion in a state where both steel pipes are in contact with each other, so that welding can be performed outside the steel pipe connecting portion.

It is preferable that such a back support device 170 is arranged in a circumferential direction, respectively, on both sides between the two shaping devices 130, and each of the back support devices is arranged in a staggered position (alternatively). Do.

Each of the back supporting devices includes a supporting bracket 171 supported on the center frame 110 and one side shaping device 130A, a sliding body 173 slidably installed on the supporting bracket 171, and a supporting bracket. Supporting actuator 175 for linearly moving the sliding body 173 in the state supported by 171, and supporting plate 177 is provided on the outer portion of the sliding body 173 and in close contact with the inner surface of both steel pipe connecting portion It is preferred to be configured.

Here, the supporting brackets 171 are provided at left and right sides, respectively, and referring to FIG. 3, the first supporting brackets 171A are installed in a vertical structure around the center frame 110 and the second supporting brackets 171B. ) May be configured as a structure installed on the side of one shaping device (130A). Of course, the second supporting bracket 171B may also be configured to be supported by the center frame 110 like the first supporting bracket 171A.

Both of the supporting brackets 171 are provided with sliding brackets 172 (see FIG. 3) for supporting and guiding the sliding bodies 173 to be slidably operated on mutually opposite surfaces of the upper side. The sliding bracket 172 is preferably formed in a structure inclined in the direction of the connection portion of the steel pipe.

In FIG. 3, reference numeral 180 denotes a supporting support structure for supporting the sliding bracket 172 to configure the first supporting bracket 171A installed on the center frame 110, that is, the outer cylinder 113. The supporting support structure 180 has a disc portion 181 arranged side by side in a structure similar to the disc of the forming apparatus 130, and a support bracket 183 for stably fixing the disc portion 181 to the center frame 110. It can be made of). Of course, the sliding bracket 172 described above is provided on the upper portion of the disc portion 181.

The supporting actuator 175 can be configured using one of known linear motion mechanisms as long as the sliding actuator 173 is capable of linearly moving the sliding body 173. In the drawing of this embodiment, the structure comprised by the hydraulic cylinder is illustrated. At this time, the hydraulic cylinder is preferably configured such that the piston rod is connected to the sliding body 173 and linearly moved in a state that the hydraulic cylinder is rotatably supported by the disc-shaped body of the supporting support structure 180 or the shaping device 130.

The supporting plate 177 may be made of a metal plate material such as a copper plate material, and the outer surface is formed to be rounded so as to substantially match the curvature of the inner surface of the steel pipe, and both steel pipes move in and out along the sliding body 173. It is configured to be in close contact with the inner surface of the connection.

In this case, the supporting plate 177 is divided into a plurality of pieces so as to be in close contact with the inner surface of the steel pipe connection while expanding as shown in FIGS. 2 and 5 in a reduced state as shown in FIGS. 1 and 4.

That is, when the supporting plate 177 is expanded, it forms a circular band and is in close contact with the inner surfaces of both steel pipe connecting portions. In the reduced state, a plurality of pieces are divided and moved inwards, and in both directions (each shaping device 130). Direction).

The supporting plate 177 is configured to be in contact with each other, that is, the contacting portion 177a (see FIG. 3) in an inclined structure, so that the supporting plate 177 can be firmly adhered to the inner surface of the steel pipe connection while supporting each other in an expanded state. It is preferred to be configured.

In the drawing of this embodiment, the supporting plate 177 is divided into eight, accordingly, the sliding body 173, the supporting bracket 171 for supporting it, and the actuator 175 for providing an actuation force to the sliding body 173, respectively. The configuration provided with eight is illustrated. Of course, the number of configurations can be changed to a number below or above according to the implementation conditions.

Accordingly, the back supporting device 170 is configured such that the sliding direction of each sliding body 173 slides in an inclined direction toward the inner surface of the steel pipe connecting portion, so that the supporting plates 177 of both back supporting devices are connected to the inner surface connecting portion of the steel pipe. When being in close contact with both supporting plates 177 are alternately coupled to each other to form a circular band structure as a whole is configured to support the inner surface of the steel pipe connection.

Since the back support device 170 provided in the present invention is configured to expand while the support plate 177 moves in an inclined direction, the back support device 170 is simplified as a whole, and the support plate ( 177) provides the advantage of enabling operation with minimal interference.

Now, an operational implementation of the steel pipe internal forming apparatus 100 according to the present invention configured as described above will be described.

In a state in which both steel pipes P are arranged in a line as shown in FIG. 1, the steel pipe internal forming apparatus 100 enters into the steel pipe. At this time, in the state in which the traveling device 120 of the steel pipe internal shaping device 100 is deployed, as shown in FIG. The movement of the steel tube internal shaping device 100 may be automatically driven by operating an electric motor when the traveling device 120 is configured to be capable of automatic driving, and in the case of being configured for manual driving, by dragging by using a traction trolley. It can move inside the steel pipe.

When the steel pipe internal shaping device 100 reaches the connection part of both steel pipes, the steel pipe internal shaping is performed so that the centers (C; see FIG. 1) of both supporting plates 177 of both back supporting devices 170 coincide with the center of the steel pipe connecting part. With the device 100 in place, the second shaping device 130B is operated to extend the shaping pins 133 to secure the entire steel pipe internal shaping device 100 to one steel pipe.

Thereafter, the first shaping device 130A located inside the other steel pipe is operated to extend the shaping pins 133, thereby fixing the first shaping device 130A side inside the other steel pipe. At this time, while extending the first shaping device (130A) and the second shaping device (130B), it is also possible to simultaneously implement an operation to form a step so that the step can be minimized in a state in which both steel pipes close to or in the garden.

As described above, the operation of the first and second shaping devices 130 is performed by pushing the push blocks 139 forward while the shaping cylinders 142 are operated, so that the shaping pins 133 are extended to form the shaping pads 137. Is made by the operation in close contact with the inner surface of the steel pipe.

Then, when both ends are fixed to both steel pipes using the forming device 130 and the ends of both steel pipes are formed, the traction device 150 is operated to bring the two steel pipes into close contact with each other. At this time, the interval between the two forming apparatus 130 and the center frame 110, the inner cylinder 112 is slid into the outer cylinder 113.

As described above, when both steel pipes butt to each other, the back support device 170 for welding the steel pipe is operated, the support plate 177 is in close contact with the inner surface of the both steel pipe connecting portion.

At this time, the supporting plate 177 is in close contact with the inner surface of the steel pipe while extending upward in the inclined direction on both sides of the forming apparatus 130 as described above, and at the same time the supporting plate 177 is in contact with the inclined surface 177a, When expanded as a whole, it forms a circular band structure and is in close contact with the inner surfaces of both steel pipe connections to support external welding.

7 is a steel pipe connection of the outer surface of the steel pipe connection using the automatic welding device 200 equipped with the automatic welding robot 250 in a state supported by the back support device 170 of the internal pipe forming apparatus 100 is made. As a view illustrating the state, the back plate is welded while the back bead is formed on the inner surface side of the steel pipe connection portion by the supporting plate 177 of the back supporting apparatus 170, and thus, the steel pipe outer surface automatic welding is not performed separately. The steel pipe connection work can be completed only by welding the outer surface of the steel pipe using the apparatus 200.

Meanwhile, when one pass welding of the outer surface of the steel pipe connection part is completed using the automatic welding robot 250 of the steel pipe outer surface automatic welding device, the steel pipe internal forming apparatus 100 inside the steel pipe is moved to the next steel pipe connection part, and then the steel pipe connection part The inner surface is shaped and supported to weld the outer surface of the steel pipe connection. That is, the steel pipe internal forming apparatus 100 according to the present invention supports the steel pipe outer surface only until one pass welding, and quickly moves to the next steel pipe connection portion to assist the welding to be additionally made by using another steel pipe outer surface automatic welding device. It is desirable that the entire steel pipe connection work is performed in the process.

Of course, all the pass welding of the steel pipe connection, that is, for example, the process of completing the external welding in the state of supporting the inner surface of the steel pipe connection using the steel pipe internal forming apparatus 100 in the interior of the steel pipe until the completion of the three-pass welding It is also possible to proceed.

Next, a second embodiment of the steel pipe internal forming apparatus according to the present invention will be described. For reference, the same reference numerals are assigned to the same or similar constituent parts, and repeated description thereof will be omitted.

Figure 8 is a side configuration showing a steel pipe internal forming apparatus of a second embodiment according to the present invention.

The steel pipe internal shaping device of the second embodiment is similar in structure to the steel pipe internal shaping device of the first embodiment described above, but the traveling device is installed on both sides of the center frame 110, and the back support device 170 is installed. The configuration is different from that of the first embodiment.

That is, the steel pipe internal forming apparatus of the second embodiment according to the present invention is provided on both sides of the center frame 110, the center frame 110 is installed long in the longitudinal direction so as to travel inside the steel pipe (P). Is provided between the traveling device 120, the center frame 110 is provided between the two forming devices 130, the two forming devices 130, which are in close contact with the inner surface of both steel pipes and grips the steel pipe connection, respectively. It is composed of a towing device 150 to pull the steel pipes to be in close contact with each other.

Here, the detailed configuration of the traveling device 120, the shaping device 130, the towing device 150 may be made in the same manner as the configuration of the first embodiment described above, and thus repeated description thereof will be omitted.

The steel pipe internal forming apparatus of the second embodiment may be easily applied to a steel pipe connecting method of a type in which one steel pipe is inserted into the other steel pipe, not the steel pipe butt connecting method described above.

Next, a third embodiment of the steel pipe internal forming apparatus according to the present invention will be described. For reference, the same reference numerals are used to refer to the same or similar components as the above-described embodiments, and repeated description thereof will be omitted.

9 to 14 is a view showing a third embodiment of the internal pipe forming apparatus according to the present invention, Figures 9 to 11 is a side configuration view showing a state when the support is released of the back supporting device, the main part plan view in detail, 12 to 14 are side sectional views showing the state of the back support apparatus during the supporting operation, the main part plane detail view, and the main part cross sectional detail view.

As illustrated in these drawings, the steel pipe internal shaping device 100 according to the third embodiment of the present invention includes a center frame 110, a traveling device 120, both shaping devices 130, and a traction device 150. The configuration of the present invention may be the same as or similar to that of the above-described first embodiment.

However, in the third embodiment of the present invention, the configuration of the back supporting apparatus 190 is different from that of the first embodiment of the present invention.

In the back support apparatus 190 of the present embodiment, a plurality of support plates 197 divided in a circumferential direction between two forming apparatuses 130 in a circumferential direction move in a left and right direction, and can perform a support operation and a release operation. It is configured to be. That is, during the supporting operation, the divided supporting plates 197 are raised as a whole and are gathered in a circular band structure at both sides to support the inner connections of both steel pipes, and when the supporting operation is released, the divided supporting plates ( 197 is configured to be released as well as to be released on both sides.

At this time, it is preferable that the plurality of supporting plates 197 are staggered so that adjacent supporting plates 197 can move in opposite directions (left and right directions when viewed from the side).

The back supporting apparatus 190 includes a supporting bracket 191 supported on one side of the forming apparatus 130A, and a plurality of supporting support blocks disposed at regular intervals in the circumferential direction on the outside of the supporting bracket 191 ( 193 and a plurality of supporting actuators 192 installed on the supporting bracket 191 to linearly move the supporting support blocks 193 in the vertical direction (the radial direction), and the supporting support blocks 193, respectively. An elastic member disposed between the plurality of supporting plates 197 slidably disposed in the longitudinal direction of the steel pipe and between the supporting plates 197 and the supporting support blocks 193 to provide elastic force to the supporting plates 197. 196 is configured.

Here, the supporting bracket 191 is preferably installed in a circular ring structure on the side of one shaping device (130A), if necessary in the longitudinal direction of the supporting bracket 191 and the steel pipe on the other shaping device (130B) side. It is also possible to configure the subplate 199 (parts indicated by dotted lines in Fig. 9 and the like) so as to slide mutually.

The sub plate 199 may be combined with the supporting bracket 191 to protect the inside of the shaping device and to support one side of the supporting bracket 191.

The supporting support block 193 includes a coupling part 193a to which the supporting actuator 192 is largely extended, and horizontally extends from the coupling part 193a in the longitudinal direction of the steel pipe, and the supporting plate 197 is slid upward. It may be made of a sliding portion 193b.

Here, the sliding part 193b is provided with a sliding mechanism 194 between the supporting plate 197, the sliding mechanism 194 is a slide guide 194a fixed to the supporting support block 193 and this slide It is preferably made of a sliding block 194b which is linearly moved along the guide 194a and on which the supporting plate 197 is installed.

At both ends of the sliding part 193b, the support part 193c protrudes upward (outward) so as to support the elastic member 196. On the contrary, the support 193c does not protrude, and as illustrated in the drawing, the sliding part 193b may be formed in a groove structure as a whole to support the elastic member 196 at both ends.

The supporting actuator 192 may be composed of a cylinder 192a which is operated by pneumatic or hydraulic pressure, in which the cylinder is installed to be supported by the supporting bracket 191 and the piston rod 192b of the cylinder is formed of the supporting support block 193. It is preferably configured to be coupled to the coupling portion 193a.

The supporting plate 197 has an elongated plate shape and is disposed long in the circumferential direction, and the upper surface is formed with a curved surface that matches the inner radius of curvature of the steel pipe so as to be in close contact with the inner surface of the steel pipe. Of course, it is also possible to form the entire supporting plate 197 to have a curved structure.

The supporting plate 197 is preferably configured such that both ends 197a are formed to be inclined such that the supporting plates 197 can be opened or collected on both sides in close contact with the adjacent supporting plates 197.

The elastic member 196 may be installed between any one of both support parts 193c of the sliding part 193b and the sliding block 194b to provide an elastic force to the supporting plate 197.

That is, since the adjacent supporting plates 197 are configured to move in opposite directions, the elastic members 196 may also be arranged alternately in opposite directions about the respective supporting plates 197.

The elastic member 196 illustrated in the drawings of the present embodiment exemplifies a structure in which a plurality of coil springs are installed. However, the elastic member 196 is not limited thereto, and various elastic members known in the art may be provided if the supporting plate 197 is provided with an elastic force in a direction in which the supporting plate 197 is extended. Of course, it can be used by applying 196).

The steel pipe internal forming apparatus of the third embodiment according to the present invention configured as described above is made in the same manner as the operating method of the first embodiment described above.

However, since the third embodiment is configured differently from the back supporting apparatus 190 of the first embodiment, only the operation of the back supporting apparatus 190 will be described.

9 to 11 are As the figures of the back supporting device 190 when the supporting operation is deactivated, the supporting support blocks 193 are in the lowered state, and the supporting plates 197 are open to both sides.

At this time, since the supporting plate 197 is in the lowered state, the radius of the overall supporting plate 197 becomes smaller than that of the supporting operation (expansion). Accordingly, both ends 197a of the adjacent supporting plates 197 staggered from each other are pushed to both sides by the inclined contact (sliding), thereby compressing the elastic member 196.

In this state, when the supporting operation of the back supporting device 190 is made, as shown in FIGS. 12 to 14, the supporting support block 193 is provided with pneumatic (or hydraulic) pressure on the cylinder, which is the supporting actuator 192. These are raised (expanded), and the overall radius formed by the supporting plate 197 also increases, and the supporting plate 197 moves in a direction in which they are gathered together by the elastic force of the elastic member 196 to form a circular band structure as a whole.

Therefore, the supporting plates 197 support the inner connection of both steel pipes in a state of gathering in a circular band structure, and in this state, the automatic welding device can be automatically mounted by mounting the steel pipe outer welding device on the outer surface of the steel pipe connection as shown in FIG. 7. It becomes possible.

As described above, the technical idea described in the embodiments of the present invention may be implemented independently, or may be implemented in combination with each other. In addition, the present invention has been described through the embodiments described in the drawings and the detailed description of the invention, which is merely exemplary, and those skilled in the art to which the present invention pertains various modifications and equivalent other embodiments therefrom It is possible. Accordingly, the technical scope of the present invention should be determined by the appended claims.

Claims (11)

A center frame installed in the longitudinal direction;
A traveling device provided on the center frame to travel inside the steel pipe;
Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively;
A traction device provided between the two shaping devices to pull the two steel pipes into close contact with each other or to face each other by narrowing the distance between the two shaping devices holding both steel pipes;
An internal shaping device for constructing a steel pipe connection, comprising a back support device which is in close contact with the inner surface of the connecting portion of both steel pipes between the two shaping devices to assist welding of the steel pipe outer surface.
A center frame installed in the longitudinal direction;
A traveling device provided on the center frame to travel inside the steel pipe;
Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively;
An internal forming apparatus for connecting a steel pipe, comprising a traction device provided between the two forming apparatuses and towing the two steel tubes to be brought into close contact with each other or to face each other by narrowing the distance between the two forming apparatuses holding both steel pipes.
The method according to claim 1 or 2,
The traveling device,
A traveling support disposed in a three way manner around the center frame, a wheel installed at an end of the traveling support and rotating along an inner surface of the steel pipe, and installed around the center frame and the traveling support centered around the center frame A first driving support rotatably connected to the driving support so as to be able to be folded and unfolded, a second driving support slidably installed around the center frame at a position spaced apart from the first driving support, and An internal shaping device for constructing a steel pipe connection comprising a spreading support connected between a second driving support and each driving support.
The method according to claim 1 or 2,
Each shaping device,
A plurality of orthopedic fins which are disposed around the center frame in a disk-shaped body structure, are disposed in a radial structure around the center frame and protrude out of the outer periphery of the orthopedic body and are in close contact with the inner surface of the steel pipe. And a push block installed in the axial direction of the center frame to push the shaping pins, and a shaping cylinder to move the push block back and forth.
The method of claim 4,
Both push blocks provided in the two orthopedic devices are disposed to face each other, and a push guide having an axial structure is installed between both push blocks, and each push block includes guide grooves having both ends of the push guide inserted into and coupled to each push block. Internal orthopedic device for connecting the steel pipe, characterized in that formed.
The method according to claim 1 or 2,
The towing device includes a plurality of towing cylinders connected to both of the shaping devices to adjust the distance between the two shaping devices, and the center frame between the two shaping devices is connected to the outer cylinder and the inner cylinder inserted therein. Internal forming apparatus for connecting the steel pipe, characterized in that the length of the center frame is configured to be variable according to the change in the spacing of the forming apparatus.
The method of claim 6,
The towing device, the internal shaping device for the steel pipe connection construction, characterized in that the guide rods are connected between the orthodontic device between the towing cylinders.
The method according to claim 1,
The back support device, a plurality of each is disposed between both sides of the orthopedic device, both the back support device is arranged to cross each other,
Each of the back supporting devices includes a supporting bracket supported by the center frame or one shaping device, a sliding body slidably mounted to the supporting bracket, and a supporting actuator for linearly moving the sliding body in a state supported by the supporting bracket. And, a support plate installed at an outer portion of the sliding body and configured to be in close contact with the inner surfaces of both steel pipe connection parts to support the steel pipe connecting part so that welding can be made.
The method of claim 8,
The back support device, the sliding direction of each sliding body is made to slide in a direction inclined toward the inner surface of the steel pipe connecting portion,
When the supporting plate of both the back supporting device is in close contact with the inner connection of the steel pipe, both supporting plates are alternately coupled with each other, so that the overall forming device for connecting the steel pipe is formed so as to form a circular band structure as a whole. .
The method according to claim 1,
The back supporting device includes: a supporting bracket supported on either one of the two shaping devices; A plurality of supporting support blocks disposed at regular intervals in the circumferential direction on the outside of the supporting bracket; A plurality of supporting actuators installed on the supporting bracket side to linearly move each supporting support block in a radial direction; A plurality of supporting plates disposed on the supporting support blocks so as to be slidable in the longitudinal direction of the steel pipe; An elastic member disposed between each of the supporting plates and the supporting support block to provide an elastic force to the supporting plate,
The plurality of supporting plates are arranged such that adjacent supporting plates slide in opposite directions. In the supporting operation, a plurality of supporting plates are raised by the supporting actuators, and the supporting plates which are opened to both sides by the elastic members are circular. Gathered in a band structure and configured to support the inner connection of both steel pipes, and when the support operation is released is characterized in that the supporting actuator is configured to be released while the plurality of supporting plate is lowered and opened to both sides. Internal orthopedic device for steel pipe connection construction.
A center frame installed in the longitudinal direction; Two forming apparatuses provided around the center frame to be held in close contact with inner surfaces of both steel pipes, and to form both steel pipe connecting portions, respectively; A back support device which is in close contact with the inner surfaces of the connection portions of both steel pipes between the two orthopedic devices to assist welding of the steel pipe outer surface;
The back support device, a plurality of each is disposed between both sides of the orthopedic device, both back support devices are arranged to be staggered with each other,
Each of the back supporting devices includes: a supporting bracket supported by the center frame or one orthopedic device, a sliding body provided on the supporting bracket so as to slide in an inclined direction toward an inner surface of the steel pipe connecting portion, and supported by the supporting bracket It is configured to include a supporting actuator for linearly moving the sliding body in a closed state, and a supporting plate which is installed on the outer side of the sliding body and is in close contact with the inner surface of both steel pipe connecting portions to support welding to the outside of the steel pipe connecting portions,
When the supporting plate of both the back supporting device is in close contact with the inner connection of the steel pipe, both supporting plates are alternately coupled with each other, so that the overall forming device for connecting the steel pipe is formed so as to form a circular band structure as a whole. .

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