KR100891737B1 - Socket apparatus connecting straight pipe - Google Patents

Abstract

The present invention relates to a socket device for a straight pipe connection, consisting of a cylindrical first socket ring, a tapered second socket ring and an annular third socket ring, and one side of the first, second and third socket rings is cut in a predetermined width. A socket ring body having a gap portion formed therein; A guide part for guiding the expansion and contraction of the socket ring body; Is provided on the inside of the first socket ring is configured to include an expansion and contraction to stretch the socket ring body. The present invention is a socket ring body fixed to the rear end of the preceding first pipe while supplying the first and second pipes to be coated in the factory coating the synthetic resin film on the pipe such as steel pipe to the pipe conveying device The second pipe following the tapered second socket ring is naturally joined so that the first and second pipes are joined while keeping their axial center line aligned and horizontal, so that the synthetic resin coating is continuously and uniformly formed on the outer circumferential surface of the first and second pipes. It is possible to form a high-quality coating, and even if the diameter of the pipe to be covered can be used in a range of a predetermined width without having to manufacture the socket device for connecting the straight pipe for each dimension.

Description

Socket device for straight pipe connection {SOCKET APPARATUS CONNECTING STRAIGHT PIPE}

1 to 7 is a view showing a socket device for straight pipe connection according to an embodiment of the present invention,

1 is a longitudinal sectional view showing an example of the use of the socket device in the coating process.

Figure 2 is an exploded perspective view of the main portion of Figure 1;

Figure 3 is a longitudinal sectional view of the socket device for straight pipe connection.

4 is a partially enlarged cross-sectional view of the socket device for straight pipe connection.

5 and 6 are a plan view showing the configuration and operation of the socket device for straight pipe connection.

7 is a perspective view showing an extract of the guide portion.

Figure 8 is a perspective view showing another form of the socket ring body.

<Description of the symbols for the main parts of the drawings>

10,11: first and second pipe 20: pipe feeder

100: socket ring body 110: first socket ring

120: second socket ring 130: third socket ring

140: guide portion 141: arc-shaped guide

142: guide piece 143: fixed piece

150: expansion control 151: adjusting nut

152,153 bolt 154: shaft piece

G: spacing

The present invention relates to a socket device for connecting a straight pipe, and in particular, a cylindrical material is formed at the rear end of the first pipe, which is supplied to the pipe feeder while supplying the first and second pipes to be coated in a factory which coats a synthetic resin film on a pipe such as a steel pipe. 1 The second pipe that follows the tapered second socket ring of the socket ring main body fixed by the socket ring is naturally joined so that the first and second pipes are joined while keeping the axis center line aligned and horizontal. The present invention relates to a socket device for connecting a straight pipe to form a high-quality coating by forming a uniform coating on the outer circumferential surface.

In general, when the outer surface of steel pipes and epoxy coating are coated by using a rotary wheel for continuous work, the pipes are twisted or separated frequently due to the difference in the rotation of the pipes before and after, and also there is a step difference, which leads to many coating defects during the work. Occurs.

In other words, when manufacturing the extruded coated steel pipe, the line and trailing pipes having the predetermined length to be coated are connected by socket ring, and continuously fed to the extruded coating device by the pipe feeder using the rotating wheel, and extruded from the extruded coating device. The synthetic resin film is spirally wound on the outer circumferential surface of the pipe, and in the manufacture of such coated steel pipe, when connecting the line and the following pipe using a conventional general socket ring, the shaft center line of the pipe supplied before and the pipe supplied later As a result of this shift, leveling is not maintained and a step is generated. Accordingly, the synthetic resin film is unevenly coated, resulting in poor coating.

In addition, the existing general socket ring is capable of continuous work for coating extrusion and painting of 6M ~ 12M pipe, but cannot be used if the pipe thickness and pipe schedule are different.

The pipe schedule here refers to the allowable pressure on the material stress of the pipe.

In addition, the existing general socket ring has a roundness of the pipe, or a step difference occurs due to the bending between the pipe and the pipe. Twisting caused coating defects such as crushing and bursting of the coating, and a fatal problem occurred that the coolant flowed into the pipe during operation and rust occurred inside.

And after the socket ring is pulled out during processing, the pipe is separated after, there was a problem that the continuous work is interrupted during coating and coating failure occurs.

The present invention was created in order to solve the above-mentioned problems and defects as described above, and the preceding first while supplying the first and second pipes to be coated in the factory which coats the synthetic resin film on the pipe such as steel pipe to the pipe conveying apparatus The trailing second pipe is naturally joined to the tapered second socket ring of the socket ring body fixed to the rear end of the pipe by the cylindrical first socket ring, so that the first and second pipes are aligned while the axis line is aligned and leveled. It is an object of the present invention to provide a socket device for a straight pipe connection in which a synthetic resin coating is continuously and uniformly formed on the outer circumferential surface of the first and second pipes to form a high quality coating.

In order to achieve the above object, the socket device for straight pipe connection according to the present invention includes a cylindrical first socket ring inserted into a rear end portion of the first pipe 10 which is previously supplied to the extrusion coating device by the pipe feeder 20 ( 110, a tapered second socket ring 120 provided at one side of the first socket ring 110 and inserted into a distal end portion of the second pipe 20 which is subsequently supplied to the pipe conveying device 20; It consists of an annular third socket ring 130 welded to the outer circumferential surface of the first socket ring 110 and inserted between the adjacent ends of the first and second pipes 10 and 20 and the first to third sockets. A socket ring body 100 having one side of the rings 110, 120, and 130 cut into a predetermined width to form a gap G; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And an elastic adjustment hole 150 provided inside the first socket ring 110 to expand and contract the socket ring main body 100, wherein one side of the circumferential wall of the cylindrical body of the socket ring main body 100 is first; Formed by the socket ring 110, the other side is cut into a plurality of small pieces and then bent into a tapered shape and connected to the adjacent edge of each piece by welding to form the tapered second socket ring 120 It is characterized by.
Another straight pipe connecting socket device according to the present invention in order to achieve the above object is a cylindrical first socket ring inserted into the rear end of the first pipe 10, which is previously supplied to the extrusion coating device by the pipe feeder (20). 110, a tapered second socket ring 120 provided at one side of the first socket ring 110 and inserted into a distal end portion of the second pipe 20 which is subsequently supplied to the pipe feeder 20. And an annular third socket ring 130 welded to an outer circumferential surface of the first socket ring 110 and inserted between adjacent ends of the first and second pipes 10 and 20. A socket ring body 100 having one side of the socket rings 110, 120, and 130 cut into a predetermined width to form a gap G; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And an elastic adjustment hole 150 provided inside the first socket ring 110 to expand and contract the socket ring main body 100, and the tapered shape is formed on the cylindrical first socket ring 110. The second socket ring 120 is characterized in that configured by welding.
Another straight pipe connecting socket device according to the present invention in order to achieve the above object, the cylindrical first socket is inserted into the rear end of the first pipe (10) previously supplied to the extrusion coating device by the pipe feeder (20) A ring 110 and a tapered second socket ring 120 provided at one side of the first socket ring 110 and inserted into a front end portion of the second pipe 20 which is subsequently supplied to the pipe conveying device 20. And an annular third socket ring 130 welded to an outer circumferential surface of the first socket ring 110 and inserted between adjacent ends of the first and second pipes 10 and 20. 3, the socket ring main body 100 having one side of the socket rings 110, 120, and 130 cut into a predetermined width to form a gap G; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And it is provided on the inner side of the first socket ring 110, the expansion and contraction adjustment 150 to stretch the socket ring body 100, the guide portion 140 of the first socket ring 110 The guide piece 142 and the fixing piece 143 are fixed to both sides on the inner circumferential surface with the gap interposed therebetween, and one end of the arc-shaped guide 141 is fixed by welding in the form inserted into the fixing piece 143. The other end of the arc-shaped guide 141 is slidably coupled to the guide piece 142.
Another straight pipe connecting socket device according to the present invention in order to achieve the above object, the cylindrical first socket is inserted into the rear end of the first pipe (10) previously supplied to the extrusion coating device by the pipe feeder (20) A ring 110 and a tapered second socket ring 120 provided at one side of the first socket ring 110 and inserted into a front end portion of the second pipe 20 which is subsequently supplied to the pipe conveying device 20. And an annular third socket ring 130 welded to an outer circumferential surface of the first socket ring 110 and inserted between adjacent ends of the first and second pipes 10 and 20. 3, the socket ring main body 100 having one side of the socket rings 110, 120, and 130 cut into a predetermined width to form a gap G; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And it is provided on the inner side of the first socket ring 110, the expansion and contraction adjustment 150 to stretch the socket ring body 100, the expansion adjustment 150 is on both sides of the adjustment nut 151 A pair of turnbuckles in which bolts 152 and 153 are screwed is disposed in parallel to the inside of the first socket ring 110, so that both ends of the bolts 152 and 153 are fixed to the inner circumferential surface of the first socket ring 110. It is characterized by being configured to be condensed to the piece 154, respectively.

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Conventionally, there are various methods of manufacturing a coated tube, such as a method of spraying epoxy and painting, a method of coating and fusion of a synthetic resin material of PE / PP, a method using a film type, and a coating method related to the present invention. As a result, the resin is extruded into a film shape in an extruder die and wound by winding five to six times spirally on a rotating steel pipe.

In order to produce the coated tube by using film extrusion, the connection of the tube must be continued. If the level cannot be maintained during extrusion, continuous operation is impossible. Also, the thin membrane of the molten state cannot be neatly coated on the pipe. If the defective rate rises, the cost increases.

In the applicant company, it is difficult to maintain the horizontal level of the tube when producing a large tube, a huge loss has occurred, and the socket ring for straight pipe connection of the present invention was developed to solve this problem, it is adopted in the film extrusion process of the coating The coating tube excellent in the characteristic, adhesive force, etc. was obtained.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 to 7 is a view showing a socket device for a straight pipe connection according to the present invention, Figure 1 is a longitudinal cross-sectional view showing an example of the use of the socket device in the coating process, Figure 2 is an exploded perspective view of the main part of Figure 1, respectively, 3 is a longitudinal cross-sectional view of the socket device for straight pipe connection, Figure 4 is a partially enlarged cross-sectional view of the socket device for straight pipe connection, respectively, Figure 5 and Figure 6 is a plan view showing the configuration and operation of the socket device for straight pipe connection, respectively 7 is a perspective view showing an excerpt of the guide part.

First, referring to FIGS. 1 and 2, the straight pipes 10 and 11 are mounted on the pipe feeder 20 to be transported.

The straight pipes 10 and 11 are connected and transported to be horizontally maintained by the socket device for straight pipe connection of the present invention having the socket ring body 100.

The pipe conveying apparatus 20 is a plurality of rubber rotating wheels 21, such as a rubber tire for a vehicle is arranged at a predetermined angle, respectively coupled to the shaft 22 and rotated by a separate drive means (not shown) It is comprised so that the straight pipes 10 and 11 which have length (for example, 12M) may be advanced forward at the required speed to the left with reference to drawings.

1 to 7, the socket device for straight pipe connection includes a cylindrical first socket ring 110 inserted into a rear end of a first pipe 10 and a first socket ring 110. A tapered second socket ring 120 provided on one side and inserted into a front end portion of the second pipe 11 that is trailing, and welded to an outer circumferential surface of the first socket ring 110 to be connected to the first and second pipes 10 and 20. The annular third socket ring 130 is inserted between the adjacent ends of the () and one side of the first, second, third socket rings 110, 120, 130 is cut in a predetermined width to the interval portion A socket ring main body 100 having (G) formed thereon, and a guide part 140 provided on the inner circumferential surface of the first socket ring 110 to be adjacent to the gap G to guide the expansion and contraction of the socket ring main body 100. And, it is provided to the inside of the first socket ring 110 is configured to include an expansion and contractor 150 for stretching the socket ring body 100.

The socket ring main body 100 uses one side of the circumferential wall of the cylindrical body as the first socket ring 110, cuts the other side into a plurality of small pieces, bends in a tapered shape, and welds the adjacent edges of each small piece as shown in FIG. To form a tapered second socket ring 120 or a tapered second socket ring 120 to the cylindrical first socket ring 110 by welding, the first socket ring 110 The outer circumferential surface of the third socket ring 130 may be formed by welding.

The guide portion 140 is fixed to both sides of the guide piece 142 and the fixed piece 143 on the inner circumferential surface of the first socket ring 110 as shown in Figure 7 with the gap portion G therebetween, an arc-shaped guide One end of 141 is fixed by welding in the form inserted into the inside of the fixing piece 143, the other end of the arc-shaped guide 141 is configured to be slidably coupled to the guide piece 142.

The expansion adjusting part 150 has a pair of turnbuckles in which bolts 152 and 153 are screwed to both sides of the adjusting nut 151 and disposed in parallel to the inside of the first socket ring 110, and both bolts 152. End portions 153 and 153 are rotatably connected to shaft pieces 152a and 153a, respectively, to the shaft pieces 154 fixed to the inner circumferential surface of the first socket ring 110.

Referring to the operation of the socket device for straight pipe connection according to the present invention as follows.

The socket device for straight pipe connection according to the present invention as described above is provided with a first pipe (1, 2, 10, 11) to be coated in a factory covering a synthetic resin film on a pipe such as a steel pipe. The second pipe 11 following 10 is used so that the synthetic resin coating is uniformly formed on the outer circumferential surfaces of the first and second pipes 10 and 11 by allowing the second pipe 11 to be coupled while keeping the axial center line aligned.

To describe this process in detail, first insert the first socket ring 110 of the socket ring main body 100 into the rear end of the first pipe 10 to be conveyed to the pipe conveying apparatus 20, and then the expansion control ( The socket ring body 100 is tightly fixed to the inner diameter of the first pipe 10 by using the turnbuckle of 150.

That is, when both bolts 152 and 153 are extended by rotating the adjustment nut 151 of the turnbuckle, the socket ring main body 100 of FIG. 5 is guided by the arc-shaped guide 141 and is circular as shown in FIG. 6. The outer circumferential surface of the first pipe 10 is expanded to be tightly fixed to the inner circumferential surface of the first pipe 10, and the third socket ring 130 is in close contact with the rear end of the first pipe 10.

Thereafter, when the first pipe 10 is gradually transported forward by the pipe transporter 20 and the second pipe 11 is transported faster than the first pipe 10, the second socket ring of the socket ring body 100 is provided. Since the 120 is formed in a tapered shape, the distal end portion of the second pipe 11 is naturally fitted to the outside of the second socket ring 120 by the angle difference of the rotation wheel 21.

As such, when the first pipe 10 and the second pipe 11 are connected by the socket ring main body 100, the shaft center line of the first pipe 10 and the second pipe 11 coincide with each other and remain horizontal. It is supplied to an extrusion coating device (not shown), and the synthetic resin film extruded from the extrusion coating device is uniformly coated on the outer circumferential surfaces of the first and second pipes 10 and 11 throughout.

When the coating is completed on the first and second pipes 10 and 11, the synthetic resin film coated on the connection portions of the first and second pipes 10 and 11 is cut to cut the first pipe 10 and the second pipe ( 11) is separated and then shipped after the usual post-treatment process.

The socket device for straight pipe connection of the present invention is a pipe having a large error range of some rounds, when the pipe thickness is different according to a schedule and a use, even if there is a deviation and a rolling wheel of the first and second pipes. The coating can be made uniform by combining (10) and (11) with precision.

That is, even if the pipe is somewhat rounded, the socket ring main body 100 is expanded by using the expansion and contraction hole 150 of the turnbuckle to closely contact the inner circumferential surface of the first pipe 10 and the outer circumferential surface of the first socket ring 110. 2 Since the second pipe 11 is naturally in close contact with the tapered surface of the socket ring 120, the step of the first and second pipes 10 and 11 can be eliminated, Even if the inner diameter is different, the circumferential size of the socket ring main body 100 can be adjusted at will, so there is no need to manufacture the socket ring for each thickness of the pipe.

In addition, the existing socket ring is a third socket ring (130), which has a high defect rate due to continuous twisting of the pipe driven by the rotating wheel due to the horizontal rolling and the coating twist caused by the rotational difference between the wire and the pipe. By applying), it is possible to prevent both torsion and rolling, and to keep the combined state of the pipe stable, so that the step of the pipe can be eliminated at the source to make uniform coating.

On the other hand, the socket device for straight pipe connection of the present invention as described above can also be used for pipe connection while pipe construction in the field. When connecting pipes in the field, it is very difficult to weld the pipes together, and it is less efficient in time due to the difficulty of the device itself and the work for welding the bead into the bevel part by matching the bevel part and the bevel part center of the pipe. .

When using the socket device for straight pipe connection of the present invention in such a construction site, after bending the iron plate of the required size to make a circular shape (size is the same as the pipe inner diameter size), for example, 600A or more (oil pipe and water pipe) ) After making the socket ring, after the alignment for connecting the pipe is completed, tighten the socket ring to make the center work precisely, make it by entering and expanding the weld, and then use the turnbuckle to reduce the outer diameter again. The extraction process can make the piping work easier. In this case, it should be manufactured with the socket coated with the covering material to protect and cushion the outer surface of the socket ring in order to prevent the internal damage of the pipe. However, when doing this work, if the weight of the socket is large, the work is limited, so the way to easily handle the socket ring should be supplemented.

As mentioned above, although preferred embodiment of this invention was described, the scope of the present invention is not limited to the said embodiment, Of course, various modifications are possible without deviating from the essence and essential characteristic structure of this invention. Accordingly, the embodiments described above are intended to be illustrative, not limiting, and the scope of the present invention should be understood to include the matter set forth in the appended claims and all modifications that may be understood therefrom. .

As described above, the socket device for connecting a straight pipe has a cylindrical first socket at a rear end of a preceding first pipe while supplying the first and second pipes to be covered by a pipe conveying device in a factory which coats a synthetic resin film on a pipe such as a steel pipe. The trailing second pipe is naturally joined to the tapered second socket ring of the socket ring body fixed by the ring so that the first and second pipes are joined while keeping their axial center line aligned and horizontal, so that the first and second pipes have no rotation difference. It can be supplied at the same speed and there is an advantage that the synthetic resin coating is continuously and uniformly formed to form a high quality coating.

In addition, a predetermined width portion is formed on the circumferential wall of the socket ring main body consisting of the first, second and third socket rings, and the first socket ring is elastically adjusted by an elastic adjustment tool such as a turnbuckle to be fixed to the inner circumferential surface of the first socket ring. Therefore, even if the thickness of the pipe to be coated according to the pipe schedule, use, etc., there is an advantage that can be used in a range of a predetermined width without the need to manufacture the socket device for connecting the straight pipe for each dimension. There is an advantage that it becomes easy and can reduce the process cost.

In addition, it is provided on the outer circumferential surface of the first socket ring of the socket ring main body and is followed by a gap between the rear end of the first pipe and the first socket ring by the rigid third socket ring inserted between the connecting portions of the first and second pipes. The tip of the second pipe can be prevented from being pinched, and the twisting, rolling, etc. can be prevented, and the combined state of the pipe can be kept stable. There is an advantage to this.

Claims (5)

delete In the socket device for straight pipe connection, A cylindrical first socket ring 110 inserted into a rear end of the first pipe 10 which is supplied to the extrusion coating device by the pipe feeder 20 and provided on one side of the first socket ring 110. The tapered second socket ring 120 inserted into the distal end portion of the second pipe 20 which is subsequently supplied to the pipe feeder 20 and the outer peripheral surface of the first socket ring 110 are welded to each other. It consists of an annular third socket ring 130 is inserted between the adjacent ends of the two pipes (10, 20) and one side of the first to third socket rings (110, 120, 130) is cut in a predetermined width, the gap (G) The socket ring body 100 is formed; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And Is provided on the inside of the first socket ring 110 and includes an expansion and contractor 150 for stretching the socket ring body 100, One side of the main wall of the cylindrical body of the socket ring body 100 is formed by the first socket ring 110, and the other side is cut into a plurality of small pieces, then bent into a tapered shape, and the adjacent edges of each small piece are welded. Connecting straight socket device, characterized in that formed by forming the tapered second socket ring (120). In the socket device for straight pipe connection, A cylindrical first socket ring 110 inserted into a rear end of the first pipe 10 which is supplied to the extrusion coating device by the pipe feeder 20 and provided on one side of the first socket ring 110. The tapered second socket ring 120 inserted into the distal end portion of the second pipe 20 which is subsequently supplied to the pipe feeder 20 and the outer peripheral surface of the first socket ring 110 are welded to each other. It consists of an annular third socket ring 130 is inserted between the adjacent ends of the two pipes (10, 20) and one side of the first to third socket rings (110, 120, 130) is cut in a predetermined width, the gap (G) The socket ring body 100 is formed; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And Is provided on the inside of the first socket ring 110 and includes an expansion and contractor 150 for stretching the socket ring body 100, A straight pipe connection socket device, characterized in that configured by welding the second socket ring 120 tapered to the cylindrical first socket ring (110) by welding. In the socket device for straight pipe connection, A cylindrical first socket ring 110 inserted into a rear end of the first pipe 10 which is supplied to the extrusion coating device by the pipe feeder 20 and provided on one side of the first socket ring 110. The tapered second socket ring 120 inserted into the distal end portion of the second pipe 20 which is subsequently supplied to the pipe feeder 20 and the outer peripheral surface of the first socket ring 110 are welded to each other. It consists of an annular third socket ring 130 is inserted between the adjacent ends of the two pipes (10, 20) and one side of the first to third socket rings (110, 120, 130) is cut in a predetermined width, the gap (G) The socket ring body 100 is formed; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And Is provided on the inside of the first socket ring 110 and includes an expansion and contractor 150 for stretching the socket ring body 100, The guide portion 140 is fixed to both sides of the guide piece 142 and the fixing piece 143 on the inner circumferential surface of the first socket ring 110 with a gap therebetween, one end of the arc-shaped guide 141 is A socket device for straight pipe connection, which is fixed by welding in a form inserted into the fixing piece 143, and the other end of the arc-shaped guide 141 is slidably coupled to the guide piece 142. . In the socket device for straight pipe connection, A cylindrical first socket ring 110 inserted into a rear end of the first pipe 10 which is supplied to the extrusion coating device by the pipe feeder 20 and provided on one side of the first socket ring 110. The tapered second socket ring 120 inserted into the distal end portion of the second pipe 20 which is subsequently supplied to the pipe feeder 20 and the outer peripheral surface of the first socket ring 110 are welded to each other. It consists of an annular third socket ring 130 is inserted between the adjacent ends of the two pipes (10, 20) and one side of the first to third socket rings (110, 120, 130) is cut in a predetermined width, the gap (G) The socket ring body 100 is formed; A guide part 140 provided on an inner circumferential surface of the first socket ring 110 to be adjacent to a gap part to guide expansion and contraction of the socket ring main body 100; And Is provided on the inside of the first socket ring 110 and includes an expansion and contractor 150 for stretching the socket ring body 100, The expansion adjusting part 150 has a pair of turnbuckles in which bolts 152 and 153 are screwed to both sides of the adjusting nut 151 and disposed in parallel to the inside of the first socket ring 110. An end is connected to each of the socket piece fixed to the inner circumferential surface of the first socket ring 110, 154, the socket device for connecting straight pipes, characterized in that configured.

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