KR20170079990A - Design for connecting large diameter pipes and pipes for using it - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-diameter pipe connecting apparatus for connecting a plurality of circular pipes or pipes to a desired length, and a pipe connected thereto using the same, comprising a plurality of large- A coupler formed at a distal end of the large-diameter tube and coupled to connect the large-diameter tubes to each other, a coupler coupled to and coupled to the groove formed in the connecting portion in a state where the connecting portion is in contact with the tube, reinforcing fibers inserted into the connecting portion, And a coupler corner chamfer which is formed inside the coupling between the coupler and the large-diameter pipe and is formed in a slant or rounded shape cut at 45 degrees; And a coupler connecting point chamfer which is formed at an outer side of the large-diameter pipe contacting the large-diameter pipe and the large-diameter pipe and which is formed in a diagonal shape or a round shape which is cut by 45 degrees, and a plurality of circular pipes or pipes are formed to have a desired length There is an effect that the stress generated in the large-diameter landscape for reducing the stress can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a connection apparatus of a Daegu Scenery,

The present invention relates to a large-diameter pipe connecting apparatus and a pipe using the same, and more particularly, to a connecting apparatus for large-diameter pipes for connecting a plurality of circular pipes or pipes to a desired length, .

Conventionally, materials such as a metal material, PE (polyethylene material), and GFRP (glass reinforced plastic) material are generally used as the material for forming the pipe.

These materials are mainly used for manufacturing small and medium-sized pipes having a diameter of 1 m or less, and various methods have been proposed so as to form a desired length by connecting a plurality of such pipes.

As an example of the prior art for the pipe connecting method as described above, there is a "pipe connecting apparatus and method thereof" as disclosed in Korean Patent No. 10-1341053.

More specifically, the tube connecting apparatus and method described in the above-mentioned Japanese Patent No. 10-1341053 are characterized in that the first tube and the second tube, which are adjacent to each other, are arranged such that both end portions of the first tube and the second tube A heat-shrinkable casing which is disposed between one end of the heat-shrinkable casing and the end of the first tube so as to surround a part of the heat-shrinkable casing and a part of the first tube, And a second fusing mass band positioned between the other end of the heat shrink casing and the end of the second tube and fusing and surrounding a portion of the heat shrink casing and a portion of the second tube, A pipe connecting device and its method configured to increase the watertightness and airtightness of the connection portion and to enhance the connection strength when the pipes are connected to each other as well as the double insulation pipe It relates.

As described above, conventionally, various pipe connecting methods for manufacturing small and medium-sized pipes having a diameter of 1 m or less have been proposed. However, as in the case of manufacturing a large-sized pipe connecting the floating marine equipment and the deep sea, There have been no proposals for a device or a method for connecting a plurality of large-scale scenes to produce large-scale scenery of 5 to 10 m in diameter.

Here, as an example of a conventional technique for connecting a large-sized landscape, there is an " F-Alphic concrete composite file connection device " as disclosed in Korean Patent No. 10-1193075.

More specifically, in the above-mentioned FEP 10-1193075, an FFP concrete pile connection device is constructed by wrapping the outer side of a concrete pile with fiber reinforced plastic (FRP) resin to provide durability against binding force and saltiness And to a connecting device of an increased FFP concrete composite file.

However, the above-mentioned Japanese Patent Application No. 10-1193075 has a problem that the connection method and the construction are relatively complicated and the construction method using the conventional steel pipe is not applied due to the use of the concrete composite file.

In other words, when a large-sized pipe having a diameter of 5 to 10 m is manufactured, there is a limitation in manufacturing the pipe using a single material. Even if the pipe can be manufactured, it takes a long period of time to manufacture and economical efficiency is low. As the diameter increases, the thickness of the pipe must be designed to be very large in order to maintain the circular cross-sectional shape of the pipe. However, if the pipe is designed to have a large thickness, the manufacturing cost increases and the economical efficiency and weight increase.

Further, in the piping material connecting the floating offshore facility and the deep sea, a material which is excellent in strength and electrical insulation and resistant to a corrosive environment due to chemical substances is required, and in consideration of such factors as economical efficiency and workability, Conventionally, steel pipes have been widely used.

Generally, steel pipes are connected by welding. When a single pipe is manufactured with a large diameter, it is very important to connect the single pipes to each other. However, as the diameter increases, the welding becomes difficult and the cost increases rapidly In order to solve such a problem, there is a problem in that a sufficient connection strength can not be secured for connection of a large-diameter pipe by using a conventional simple connection method instead of welding.

Accordingly, in order to solve the problems of the related art as described above, it is desirable to provide a connection method and connection structure of a large-diameter pipe having a plurality of large-diameter pipes that can be connected easily and continuously, However, devices and methods that satisfy all of these requirements are not yet available.

In order to solve such a problem, the applicant of the present invention has filed a circular pipe (hereinafter, referred to as " circular pipe ") in the invention of the application No. 10-2015-0014857 filed on January 30, 2105 The present invention proposes a method of connecting pipes to form a desired length by connecting a plurality of pipes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a specific configuration of a connection method of large-diameter screens according to the present invention. 1, a connecting portion 61 is formed at the distal end of each large-diameter tube 10 such that the cross-section is in the shape of "I ", and at both ends of the connecting portion 61, The reinforcing fiber is inserted into each of the connecting portions 61 and the bonding sheet 63 is attached to the outer surface of each of the connecting portions 61, VARTM (Vacuum Assisted Resin Transfer Molding) to form FRP (fiber reinforced plastics), or to bond them with structural adhesives to connect the respective large-diameter screens 10.

In this case, local stress concentration occurs at the edges 65 and the connecting points 67 constituting the connecting portion 61 and the coupler 62, and stress concentration mainly occurring at the edge 65 and the joining point 67 There is a problem that if the stress is accumulated in the connecting portion 61 or the coupler 62 connecting the large-diameter pipe 10, breakage or the like may occur. Therefore, there is a need to reduce the stress generated at the corner 65 and the junction 67 of the coupling portion 61 and the coupler 63.

FIG. 2 is a schematic view of a large-diameter landscape connected by a connection method of large-diameter scenery shown in FIG. 1 according to the present invention.

Referring to FIG. 2, as shown in FIGS. 2 (a) and 2 (b), a pair of couplers 62 coupled to the connecting portions 61 may be formed into arc shapes having a predetermined curvature. 2 (c), the large-diameter pipe 10 is joined using the coupler 62 and the connecting portion 61 formed at the distal end portion when the large-diameter pipe 10 is coupled. Therefore, the overall appearance after the coupling becomes as shown in Fig. 2 (c).

Fig. 3 is a view showing distribution of equivalent stress and equivalent stress applied to the large-diameter screen shown in Fig. 1 according to the cited invention. Fig.

Referring to FIG. 3, it can be seen that a maximum pressure of 145 MPa appears at the contact point 69 between the coupler 62 and the connecting portion 61. That is, the strongest pressure is applied to the contact point 69 in the state in which the water pressure is generated, and there is a problem that the risk of breakage due to the stress increase at the contact point increases due to such pressure.

1. Korean Registered Patent No. 10-1341053 (December 20, 2013) 2. Korean Patent No. 10-1193075 (Oct. 15, 2012) 3. Korean Patent Application No. 10-2015-0014857 (2015.01.30.)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a large-diameter pipe for reducing a stress generated in a large-diameter pipe for connecting a plurality of circular pipes or pipes, And a pipe using the same.

According to another aspect of the present invention, there is provided a connecting apparatus for a large-diameter pipe, comprising: a plurality of large-diameter pipes constituted by a cylindrical hollow pipe; a connecting part for connecting the large- And a coupling sheet joined to the outer surface of the coupler, wherein the coupler is coupled to the groove formed in the coupling portion in a state where the coupling portion is returned to the coupling, a reinforcing fiber inserted into the coupling portion, A coupler edge chamfer which is formed inside the coupling between the coupler and the large-diameter pipe and is formed in a slant or rounded shape cut at 45 degrees; And a coupler connecting point chamfer which is formed at an outer side of the large-diameter pipe contacting with the large-diameter pipe and at the time of the joining, and which is formed in a diagonal shape or a round shape cut at 45 degrees.

The coupler connection point chamfer may be formed in the large diameter observation, and may be formed inside the coupler so as to be symmetrical with each other.

The oblique line shape cut by 45 degrees may be configured such that the length of the oblique line is 3 mm.

The round shape may be configured such that the radius of the round is 2 mm.

The inner and outer sides of the large-diameter pipe may be fixed by a U-shaped inner coupler and an outer coupler, respectively, or an outer shape of the large diameter may be fixed by a U-shaped coupler. have.

In order to achieve the above object, the large diameter pipe using the large-diameter pipe connecting apparatus of the present invention can be manufactured by connecting a plurality of large-diameter pipes to each other by using the large-diameter pipe connecting apparatus described above.

Therefore, the connecting device of the large-diameter pipe of the present invention and the pipe using the same have the effect of reducing the stress generated in the large-diameter pipe for forming a desired length by connecting a plurality of circular pipes or pipes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a concrete configuration of a connection method of large-diameter screens according to the present invention. FIG.
FIG. 2 is a schematic view of a large-diameter landscape connected by a connecting method of large-diameter scenery shown in FIG. 1 according to the present invention. FIG.
3 is a view showing a distribution of equivalent stress and equivalent stress applied to the large-diameter screen shown in Fig. 1 according to the cited invention. Fig.
4 is a cross-sectional view illustrating a connection device of a large-diameter pipe according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a connection device of a large-diameter pipe according to another embodiment of the present invention.
Fig. 6 is a view showing a stress distribution in a connecting apparatus of a large-diameter pipe according to another embodiment of the present invention shown in Fig. 5; Fig.
7 is a view showing a stress distribution in a connecting apparatus of a large-diameter pipe according to another embodiment of the present invention.
8 is a view showing a stress distribution in a connecting apparatus of a large-diameter pipe according to still another embodiment of the present invention.
FIG. 9 is a cross-sectional view illustrating a connection device of a large-diameter pipe according to another embodiment of the present invention. FIG.
10 is a cross-sectional view illustrating a connection device of a large-diameter pipe according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

4 is a cross-sectional view illustrating a connection device of large-diameter screens according to an embodiment of the present invention. 5 is a cross-sectional view illustrating a connection apparatus of a large-diameter pipe according to another embodiment of the present invention.

4 and 5, the connecting apparatus of a large-diameter pipe according to the present invention includes a plurality of large-diameter pipes 10 in the form of a hollow hollow pipe, 61).

The couplers 62 and 64 may be divided into an inner coupler 62 and an outer coupler 64. The couplers 62 and 64 having the U- And are engaged inward and outward to be engaged with each other. The binding force is increased by inserting the reinforcing fibers into the couplers 62 and 64 and the connecting portion 61 on the outer surface in a state where the couplers 62 and 64 and the connecting portion 61 are coupled. After the reinforcing fibers are inserted into the respective connecting portions 61 and the bonding sheet is poured on the outer surface, the reinforcing resin is injected into the VARTM and joined by FRP molding or structural adhesive to connect the respective large-sized pipes. The reinforcing fiber is formed using at least one of glass fiber, carbon fiber, metal fiber and basalt fiber, and the reinforcing resin may be fiber reinforced plastic (FRP) resin.

A coupler corner chamfer 110 is formed inside the coupling between the couplers 62 and 64 and the large-diameter pipe 10. Such a coupler edge chamfer 110 reduces the stress applied to the corners of the couplers 62 and 64.

The coupler corner chamfer 110 is configured in a sloped or rounded shape cut at 45 degrees. Corresponding portions of the large-diameter pipe 10 corresponding to the coupler corner chamfer 110 are also formed in the shape of a sloped or rounded chamfer which is cut by 45 degrees and engaged with couplers 62 and 64 to be engaged. FIG. 4 shows a chevron-shaped coupler edge chamfer 110, and FIG. 5 shows a rounded coupler corner chamfer 110. FIG.

On the other hand, a coupler connecting point chamfer 120 is formed at a portion where the large-diameter tube 10, the bonding sheet 63 and the couplers 62 and 64 abut, i.e., outside and inside the large- The corresponding portion of the large-diameter pipe 10 corresponding to the coupler connecting point chamfer 120 is also formed in the shape of a sloped or rounded chamfer which is cut by 45 degrees so as to be engaged with the couplers 62 and 64. Coupler connection point chamfer 120 reduces the stress occurring at the point where the coupler 62, 64 contacts the large-diameter pipe 10.

In the case where the coupler corner chamfer 110 is formed in a slanting shape cut at 45 degrees, the length of the slanting line can be made to be 3 mm. In addition, when the coupler corner chamfer 110 is formed in a round shape, it is possible to configure the radius of the chamfer to be 1/4, that is, the round chamfer forming the arc to be 2 mm.

5, a coupler connection point chamfer 120 is formed inside and outside of each coupler 62, 64. That is, the chamfer 120 of the coupler connection point is chamfered on both sides around the outer circumferential surface of the coupler 62, 64. In other words, the chamfer 120 of the coupler connection point is formed on the side of the large-diameter pipe 10, and may be formed symmetrically inside the couplers 62 and 64. Although the round shape is formed symmetrically in FIG. 5, the coupler connecting point chamfer 120 may be formed in a round shape or a slant shape cut at 45 degrees. In Fig. 4, a shape formed only on the side of the large-diameter tube 10 is shown. FIG. 5 shows a structure in which the coupler thermally deficient chamfer 120 formed in a round shape is symmetrically formed on both sides. Preferably, the coupler connection point chamfer 120 is configured such that the round shape as in FIG. 5 is symmetrical.

As shown in FIG. 4, when the coupler connecting point chamfer 120 is formed in a slanting line, the length of the slanting line may be 3 mm. 5, when the coupler connecting point chamfer 120 is formed in a round shape, the radius of the circle of 1/4 of the coupler connecting point chamfer 120 can be configured to be 2 mm. Preferably, the coupler connection point chamfer 120 is symmetrically formed on both sides in the round shape as in FIG.

FIG. 6 is a view showing stress distribution in a connection device of a large-diameter pipe according to another embodiment of the present invention shown in FIG.

Referring to FIG. 6, it can be seen that the stress is low in the coupler corner chamfer 110. That is, since stress appears as blue or light blue, it can be understood that a stress of about 9. 5 MPa to 28.2 MPa is applied.

In addition, since the coupler connecting point chamfer 120 shows a stress distribution ranging from light blue to green, it can be seen that the stress distribution is approximately 28.2 MPa to 75.1 MPa. That is, it can be seen that the stress is drastically lowered in comparison with the configuration in which the chamfer is not formed. It can be seen that the portion with the highest stress appears highest at the end portion 130 where the bonding sheet 63 and the large-diameter tube 10 are in contact with each other. A stress of about 131 MPa appears. In this case, it can be seen that the stress is reduced by about 10% in comparison with the maximum stress in the state where the chamfer 110 and 120 are not formed.

7 is a view showing a stress distribution in a connecting apparatus of a large-diameter pipe according to another embodiment of the present invention.

The above stress distribution in Fig. 6 is a diagram showing the stress distribution when the thickness of the coupler is set to 2 mm. 7, the thicknesses of the couplers 62 and 64 are set to 1 mm and the stress distribution is measured.

Referring to Fig. 7, there is no significant difference from the stress distribution shown in Fig. Further, the maximum stress is similar in that the maximum stress is generated in the distal end portion 130 where the bonding sheet 63 and the large-diameter tube 10 contact each other. The stress distribution shown in FIG. 7 has a small difference in that the maximum stress exhibits a stress of 132 MPa, but the distribution is similar to the stress distribution in FIG. 6 as a whole.

FIG. 8 is a view showing a stress distribution in a connecting apparatus of a large-diameter pipe according to another embodiment of the present invention. FIG.

Referring to FIG. 8, the thickness of the couplers 62 and 64 is set to 4 mm and the stress distribution is measured. The stress distribution in Fig. 8 is not significantly different from the stress distribution shown in Fig. The maximum stress is also similar in that it occurs at the end portion 130 where the bonding sheet 63 and the large-diameter tube 10 are in contact with each other. The stress distribution in FIG. 8 is slightly different from the embodiment of FIGS. 6 and 7 in that a stress of a maximum stress of 134 MPa is exhibited, but a distribution similar to the stress distribution in FIGS. 6 and 7 as a whole is shown.

FIG. 9 is a cross-sectional view illustrating a connection apparatus of a large-diameter pipe according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view illustrating a large-diameter pipe connection apparatus according to another embodiment of the present invention.

9 and 10, a large-diameter pipe connecting apparatus according to another embodiment of the present invention includes a large-diameter pipe 10 at a terminal portion of a large-diameter pipe 10 having a cylindrical hollow pipe shape, A connecting portion 81 for connecting the connecting portions is formed.

The coupler 84 includes a coupler 84 for connecting the concave-shaped connection portion 81 of the large-diameter pipe 10 formed on the outside to the outside in a 'C' shape, . The binding force is increased by inserting the reinforcing fibers into the coupler 84 and the connecting portion 81 on the outer surface in a state where the coupler 84 and the connecting portion 81 are coupled. After the reinforcing fibers are inserted into the connecting portions 81 and the bonding sheet is poured on the outer surface, the reinforcing resin is injected into the VARTM, and then the FRP molding or the structural adhesive is used to connect the respective large-sized pipes. The reinforcing fiber is formed using at least one of glass fiber, carbon fiber, metal fiber and basalt fiber, and the reinforcing resin may be fiber reinforced plastic (FRP) resin.

A coupler corner chamfer 210 is formed inside the coupler 84 and the large-diameter pipe 10. Such a coupler edge chamfer 210 reduces the stress applied to the edge of the coupler 84. [

The coupler corner chamfer 210 is configured in a sloped or rounded shape cut at 45 degrees. Corresponding portions of the large-diameter pipe 10 corresponding to the coupler corner chamfer 210 are also formed in a sloped or rounded chamfered shape cut by 45 degrees and engaged with the coupler 84 to be engaged. 9 shows a chevron-shaped coupler corner chamfer 210, and FIG. 10 shows a rounded coupler corner chamfer 210. As shown in FIG.

On the other hand, a coupler connecting point chamfer 220 is formed at a portion where the large-diameter tube 10, the bonding sheet 83 and the coupler 84 abut each other, that is, outside and inside of the large- The corresponding portion of the large-diameter pipe 10 corresponding to the coupler connecting point chamfer 220 is also formed in the shape of a sloped or rounded chamfer which is cut by 45 degrees so as to be engaged with the coupler 84. Coupler connection point chamfer 220 reduces the stress occurring at the point where coupler 84 and large-diameter pipe 10 contact each other.

In the case where the coupler corner chamfer 210 is formed in a slanting shape cut at 45 degrees, the length of the slanting line can be configured to be 3 mm. When the coupler corner chamfer 210 is formed in a round shape, the radius of the round chamfer forming the arc, that is, the round shape, can be configured to be 2 mm.

10, the coupler connection point chamfer 220 is formed in a round shape symmetrical to the inside and the outside of the coupler 84. As shown in FIG. That is, the chamfer 120 of the coupler connection point forms a chamfer on both sides with the outer peripheral surface of the coupler 84 as an axis. In other words, the coupler connection point chamfer 220 may be formed on the side of the large-diameter pipe 10, and may be symmetrically formed toward the coupler 84 side. Although the round shape is formed symmetrically in FIG. 10, the coupler connection point chamfer 120 may be formed in a round shape or a slant shape cut by 45 degrees. In Fig. 9, an example in which a chamfered shape is formed only on the large-diameter side 10 side is shown. 10 shows an example in which the coupler thermal defect chamfer 220 formed in a round shape is symmetrically formed on both sides. Preferably, the coupler connection point chamfer 220 is configured such that the round shape as in FIG. 10 is symmetrical.

The chamfered portions in FIGS. 9 and 10 were also tested with the same dimensions as in FIGS. 4 and 5, and as a result, experimental results similar to those shown in FIGS. 6 to 8 were obtained. Accordingly, the shape of the chamfer is preferably formed such that the coupler connecting point chamfers 120 and 220 are symmetrical on both sides as shown in FIGS. 5 and 10, and the coupler corner chamfer 110 and 210 are formed in a round shape, The results were obtained. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

10: Daegu Scenery 61, 81: Connection
62, 64, 84: coupler 63, 83:
110, 210: Coupler corner chamfer 120, 220: Coupler connection point chamfer
130:

Claims (6)

A plurality of large-diameter pipes constituted by a cylindrical hollow pipe, a connecting part formed at a distal end of the large-diameter pipe to connect the large-diameter pipes, a coupler coupled to the groove formed in the connecting part, A reinforcing fiber inserted into the connecting portion, and a bonding sheet bonded to the outer surface of the large-diameter tube and the coupler,
A coupler edge chamfer which is formed on the inner side of the coupling between the coupler and the large-diameter pipe, and is formed in a slant or rounded shape cut at 45 degrees; And
And a coupler connecting point chamfered portion formed at an outer side of the large-diameter pipe contacting with the large-diameter pipe at the time of joining and formed in a sloped or rounded shape cut at 45 degrees. The method according to claim 1,
Wherein the coupler connection point chamfer is formed in a round shape and is formed by observing the large diameter and is formed inside the coupler symmetrically with respect to each other. The method according to claim 1,
Wherein the oblique line shape cut by 45 degrees is such that the length of the oblique line is 3 mm. The method according to claim 1,
And the radius of the round is 2 mm. The method according to claim 1,
Wherein the inner and outer sides of the large-diameter pipe are fixed by a U-shaped inner coupler and an outer coupler, respectively, or the outer side of the large-diameter pipe is fixed by a C-shaped coupler, . A large-diameter pipe using a large-diameter pipe connecting apparatus, which is manufactured by connecting a plurality of large-diameter pipes to each other by using a large-diameter pipe connecting apparatus according to any one of claims 1 to 4.

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