PDO oval piping member pd39 and renaming to prefix pdo

Abstract

To solve the problem that there is a need to replace an existing buried pipe with a larger diameter pipe or to lay a new pipe underground, and there is a need to create a new type of pipe that is comparable to a larger diameter pipe without moving other buried objects.SOLUTION: A PDO oval piping member of an oval-shaped long pipe or an oval-shaped joint has an oval outer shape composed of an upper semicircular pipe part, a lower semicircular pipe part, and a flat surface part; and is molded by extrusion molding in which a continuous curved reinforcing padding part having force to withstand internal pressure, or a continuous flat reinforcing padding part, or one or more continuous reinforcing rib-shaped padding parts are molded simultaneously on the inner surface side of the flat surface part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to synthetic resin polyethylene pipes and PVC pipes used for burying gas, water, and drainage transport pipes, electrical protection pipes, and communication protection pipes.

[0002] The present invention further relates to an elliptical piping component having an elliptical outer shape composed of an upper semicircular pipe portion, a lower semicircular pipe portion and a flat portion.

[0003] Furthermore, the present invention relates to oval piping components having an oval outer shape and having various types of continuous curved reinforcing buildup on the inner surface.

[0004] Furthermore, it relates to oval piping components made of twisted short pipes that have the same cross-sectional shape twisted around the pipe axis.

[0005] Furthermore, the present invention relates to oval piping components having various continuous reinforcement padding sections on the inner surface and bent short pipes whose direction changes at various angles, such as 30 degrees or 45 degrees, on the short axis plane or the long axis plane.

[0006] Furthermore, the present invention relates to oval piping components such as oval socket fittings having an oval outer shape or EF oval socket fittings.

[0007] Furthermore, the present invention relates to oval piping components such as oval elbow socket fittings or EF oval elbow socket fittings having an oval outer shape.

[0008] In addition, it concerns underground hydrogen transport mains and supply pipes that will be required in the future.

[0009] In addition, it involves replacing existing buried pipes with larger diameter pipes.

[0010] In addition, the prefix PD used in many coined words in inventions will be renamed from PD wire to PDO wire, and all coined prefixes will be renamed from PD to PDO to make classification clearer. For example, the prefixes PD used in patent application 2017-100437 and patent publication 2018-189158 such as PD socket, PD transmission part, PD dissipation part, and PD optical sheet will all be renamed to PDO to make them the same as PDO wire and clearly classify them from other similar technologies. [Background technology]

[0011] Conventional piping components are almost all circular or elliptical in shape, and there are no piping components with flat surfaces on the outside or oval piping components whose circular parts have the same thickness as normal pipes and have reinforcing padding on the inside of their flat surfaces.

[0012] In addition, synthetic resin polyethylene pipes and PVC pipes are connected using PDO joints, EF joints, and adhesives. Furthermore, PDO wire has been invented for use in fusing synthetic resin pipes using PDO wire and in other fields.

[0013] In addition, conventional electrical and communication protection pipes are small-diameter protection pipes that are buried in multiple rows and layers, which makes it difficult to bury new pipes nearby due to the need for detours and deep openings.

[0014] In addition, a fusion method has been invented to reduce the on-site fusion time of large diameter synthetic resin pipes buried underground.

[0015] Furthermore, replacing the existing pipes with larger diameter pipes would require extensive excavation due to the presence of other buried pipes crisscrossing the area.

[0016] Furthermore, the underground burial locations for transporting gases, liquids, gels, etc., including hydrogen, which will be necessary in the future, will require burying the pipes while detouring existing pipes, which will require complicated work. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Patent application 2017-100437 (Patent registration 6463798) [Patent Document 2] Patent Publication 2018-189158 PD Socket Summary of the Invention [Problem to be solved by the invention]

[0018] The problem we are trying to solve is the replacement of existing buried pipes, such as gas and liquid transport pipes, gas, water and drainage transport pipes, electrical protection pipes and communication protection pipes, with larger diameter pipes or new burial, and there is a need for newly created pipe types that are comparable to larger diameter pipes without moving other buried objects.

[0019] Additionally, there is the challenge of needing newly invented fittings to connect new types of piping.

[0020] Furthermore, there is a need to create new short pipes, such as bent or twisted pipes, that are convenient for piping.

[0021] Furthermore, the underground installation locations for hydrogen transport pipes that will be required in the future will have to avoid or circumvent existing pipes, and the width of the excavation is narrow. In order to transport as much as possible in this narrow space, small-diameter pipes will have to be arranged in multiple layers. This will also increase the number of connections. There is a problem that requires some new creation.

[0022] In addition to constructing new hydrogen pipes, there is also the issue of needing to increase the diameter of existing buried pipes for water supply and drainage, and replace them with new pipes.

[0023] Furthermore, when replacing existing buried pipes with larger diameter pipes or installing new pipes, there is a need to create new means to install or replace larger diameter pipes without changing the projected area from the sky.

[0024] Furthermore, the prefix PD, which the inventor has used to coin many of his inventions, needs to be unified following the renaming of the PDO line and clearly classified from names in other fields. [Means for solving the problem]

[0025] The present invention is characterized by a long PDO oval piping component having an oval outer shape composed of an upper semicircular tubular section, a lower semicircular tubular section and a flat section, and formed by extrusion molding which simultaneously forms on the inner surface of the flat section a continuous curved reinforcing buildup section which has the strength to withstand internal pressure, or a continuous flat reinforcing buildup section, or one or more continuous reinforcing rib-like buildup sections.

[0026] Furthermore, it has an elliptical external shape consisting of an upper and lower semicircular pipe section and a flat section, and in order to prevent the flat section from bulging outward due to internal pressure, various continuous reinforcing padding sections that have the strength to withstand internal pressure are simultaneously formed on the inside surface of the flat section, and it is a twisted short pipe PDO elliptical piping component that is twisted 30 degrees, 45 degrees, etc. around the pipe axis while maintaining the same cross-sectional shape.

[0027] Furthermore, it is a short pipe that has an oval external shape and is formed by 3D printing or molding, and has continuous curved reinforcing buildup, flat reinforcing buildup, or continuous reinforcing rib-like buildup sections that have the strength to withstand continuous internal pressure stress formed inside the flat section at the same time, and is provided with a PDO oval piping component that is a bent short pipe whose direction is changed at various angles such as 30 degrees or 45 degrees on the short axis plane or the long axis plane.

[0028] Furthermore, there are various oval socket fittings that have an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, and are formed by 3D printing or molding, and the means is a PDO oval piping component of an oval socket fitting composed of a pipe stop plate arrangement groove, one pipe stop plate, one or more PDO wires or EF wires, two or more terminals, and one or more indicators.

[0029] In addition, it has an oval outer shape consisting of an upper semicircular pipe section, a lower semicircular pipe section and a flat section, and is made up of a PDO oval piping component that has a PDO oval elbow joint with a direction changed to 30 degrees or 45 degrees.

[0030] In addition, the prefix PD, which has been used in the coinage of many inventions, will be unified following the renaming of the PDO line, as a means of clearly classifying them from names in other fields. Effect of the Invention

[0031] By using various types of PDO oval piping components of this invention, the depth direction can be made longer while the projected area is the same as that of the existing pipe from above, and the inner diameter area of ​​the pipe can be made larger. This means that the projected area can be significantly reduced when burying the main pipe by lining up the pipes in two or three rows.

[0032] Also, compared to a circular pipe, it does have the weakness of having a slightly less favorable fluid coefficient, but it still allows for an increased flow rate.

[0033] In addition, it can be used in a wide range of fields, such as piping for transporting city gas, hydrogen, water supply, drainage, and as protective pipes for communications and electricity.

[0034] Furthermore, it can be used as a low-load structural or construction material, which was not possible with conventional plastic pipes.

[0035] Furthermore, long pipes that can be extruded can be made of metals as well as synthetic resins, expanding the range of applications for structural materials, etc. (Manufacturing method not shown).

[0036] Therefore, even with the same projected area from the sky, the transport volume can be increased.

[0037] As a result, there is no need to excavate large holes for drop-ins, and a buried hole with the same excavation width as the existing pipe but slightly deeper will suffice, resulting in a reduction in the amount of excavated soil and the area that needs to be restored to pavement.

[0038] Furthermore, the change of the prefix PD, which was previously used as a neologism for inventions, to PDO has enabled a clear classification from the names of components and other items that include a range of fields, and from inventions that are primarily based on PDO wires to names that are used in multiple fields. [Brief description of the drawings]

[0039] [Figure 1] Figure 1 (a) shows the overall three-dimensional drawing of a long PDO piping component with a continuous curved reinforcing padding, while (b) shows the plan view, front view, and side view. [Diagram 2] Figure 2 shows the plan view, front view, and side view of a long PDO oval piping component with continuous reinforcing rib-like build-up. [Diagram 3] Figure 3 shows (c) a cross-section of an existing buried pipe, (d) a cross-section of a hole to be drilled for a larger diameter pipe, and (e) a cross-section of a hole to be drilled for a long PDO oval pipe component. [Figure 4] Figure 4 shows the overall three-dimensional view of a twisted short pipe PDO oval piping component. [Diagram 5] Figure 5 shows the overall 3D view of a short bent PDO oval piping component. The direction of the oval at both ends of the component is shown. [Figure 6] Figure 6 shows the overall three-dimensional view of a PDO oval piping component with a transition to a different diameter. [Figure 7] Figure 7 shows the plan, front and side views of a PDO oval piping component with a transition to a different diameter. [Figure 8] Figure 8 shows (f) the overall view of the PDO oval piping component with oval socket joint, (g) the front view, plan view and side view. [Figure 9] Figure 9 illustrates the deployment of multiple fusion lines on a large diameter pipe. [Figure 10] Figure 10 illustrates a PDO oval elbow socket fitting or an EF oval elbow socket fitting. [Figure 11] The front and side views of the pipe stop plate are shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] The PDO oval piping component of the present invention has a body made of synthetic resin such as polyethylene or PVC, excluding the fusion wire and the metal fittings of the terminal part.

[0041] In addition, in conjunction with the change to the prefix PDO, all coined words used in various inventions will be explained using the prefix PDO.

[0042] In addition, long PDO oval piping components have an oval outer shape consisting of an upper and lower semicircular pipe sections and a flat section, and the inner surface of the flat section has a continuous curved reinforcing buildup section that can withstand internal pressure, or a continuous flat reinforcing buildup section that is formed by extrusion molding at the same time, and have the characteristic that they can be cut to a fixed or desired length before supply.

[0043] This characteristic allows them to be replaced with pipes of a similar size to larger diameter pipes without changing the projected area from above, making them available in the form of various PDO oval piping components.

[0044] In addition, PDO oval piping components have a cross-sectional area almost identical to that of a large diameter circular pipe, so their projection area from above is small, making them suitable for burying pipes comparable to those of large diameter pipes in narrow alleys and other locations, even in new installations, where many other buried pipes are present.

[0045] In addition, because the pipe can be buried with its long axis horizontal, it has the distinctive feature that even if there is an obstacle below that cannot be removed, it can be used with a large-diameter PDO oval pipe, even if the pipe is covered with the same soil.

[0046] Furthermore, even if the pressure inside the pipe is high, the inner surface of the flat parts is reinforced with pressure-resistant padding, which has the advantage of preventing the flat parts from expanding outward due to internal pressure.

[0047] In addition, it eliminates the need for large-scale excavation required for dropping in replacement, excavation underneath other buried objects, hanging and curing other buried objects, etc. Furthermore, it reduces the amount of excavated soil, and also reduces the restoration process for the roadbed and road surface, as well as the paved area, making it a form with characteristics that are highly effective in reducing construction costs and construction time.

[0048] The invention also has a unique shape that may be applicable to metal steel pipes in the future.

[0049] Furthermore, a long PDO oval piping component has an oval outer shape consisting of an upper semicircular pipe section, a lower semicircular pipe section, and a flat section, and is a long tube formed by extrusion molding in which one or more continuous reinforcing rib-like padding sections capable of withstanding internal pressure are simultaneously formed on the inner surface of the flat section, and has the form of a long PDO oval piping component characterized by being supplied cut to a fixed or desired length.

[0050] Furthermore, the manufacturing characteristics of these extrusion processes make them suitable for supplying inexpensive piping components.

[0051] Furthermore, long PDO oval piping components have an oval outer shape composed of an upper and lower semicircular pipe section and a flat section, and also have the characteristic of being a long pipe formed by molding using a mold or by a 3D printer, in which various continuous reinforcing padding sections that have the strength to withstand internal pressure are simultaneously formed on the inner surface of the flat section.

[0052] Furthermore, twisted short pipe PDO oval piping components have an oval external shape composed of an upper and lower semicircular pipe section and a flat section, and various continuous reinforcing buildup sections that have the strength to withstand internal pressure are simultaneously formed on the inner surface of the flat section. They are twisted at various angles, such as 30 degrees or 45 degrees, while maintaining the same cross-sectional shape around the tube axis, and are formed by molding or using a 3D printer, giving them the form of a twisted short pipe PDO oval piping component.

[0053] In addition, the twisted short pipe PDO oval piping components can be twisted at various angles, making it possible to piping various types of PDO oval piping components in three dimensions using only PDO oval socket joints. This configuration has the advantage of being able to reduce the number of expensive joints, thereby reducing material costs.

[0054] Furthermore, twisted short pipe PDO oval piping components have an oval outer shape composed of upper and lower semicircular pipe sections and a flat section, and various continuous reinforcing padding sections that can withstand internal pressure are simultaneously formed on the inner side of the flat section, and are twisted at various angles such as 30 degrees or 45 degrees while maintaining the same cross-sectional shape around the tube axis, and are formed by molding or 3D printing. At both ends or one end of the twisted short pipe, the shape of a PDO oval socket fitting or one end of an EF oval socket fitting without PDO wires or EF wires is simultaneously formed, and PDO wires and EF wires are placed on the other side of the socket fitting, or part of the oval socket fitting is fused with PDO wire or EF wire to one end or both ends of the short pipe as a post-process. These are the characteristics of twisted short pipe PDO oval piping components.

[0055] Furthermore, a short bent PDO oval piping component is a short pipe that has an oval external shape and is formed using a 3D printer or molded, and has continuous curved reinforcing buildup, flat reinforcing buildup, or continuous reinforcing rib-like buildup sections that have the strength to withstand continuous internal pressure formed simultaneously inside the flat section, and has the form of a short bent PDO oval piping component that has the characteristic of changing direction at various angles such as 30 degrees or 45 degrees on the short axis plane or the long axis plane.

[0056] Furthermore, the PDO oval piping component of a short bent pipe is a short pipe having an oval outer shape and formed by 3D printing or molding, and has continuous curved reinforcing buildup, flat reinforcing buildup, or continuous reinforcing rib-like buildup sections that have the strength to withstand continuous internal pressure formed inside the flat section at the same time, and is a bent short pipe that changes direction at various angles such as 30 degrees or 45 degrees on the short axis plane or the long axis plane.It can be supplied as is, or at both ends or one end of the bent short pipe, the shape of one end of a PDO oval socket fitting or EF oval socket fitting without PDO wires and EF wires is simultaneously formed, and the other end of the oval socket fitting has PDO wires and EF wires, or a part of the oval socket fitting is fused to one end or both ends of the short pipe as a post-process and then supplied.

[0057] In addition, the PDO oval piping components for short bent pipes have a variety of bend angles, allowing connections using only PDO oval socket joints to create three-dimensional piping, which has the advantage of reducing the number of various expensive joints required.

[0058] In addition, the PDO oval piping component of the different diameter connection short pipe has an oval outer shape composed of an upper semicircular pipe section, a lower semicircular pipe section and a flat section at one end of the component, and has an oval outer shape formed simultaneously with various continuous reinforcing padding sections that have internal pressure resistance on the inner side of the flat section, a fitting connection oval section having the shape of an oval straight pipe that is inserted into an oval socket fitting and fused, and the other end of the component has a perfect circle that is inserted into a socket fitting or elbow fitting that connects a general perfect circle straight pipe and fused. It is composed of three types of sections: a circular pipe section which has the shape of a straight pipe section, and a different diameter transition section where the diameter transitions from the fitting connection oval section on one end of the component to the circular pipe section. The various continuous reinforcing padding sections on the inner surface of the flat section arranged in the fitting connection oval section gradually decrease as they move to the circular pipe section, until the reinforcing padding disappears at the circular pipe section and becomes the thick wall of the circular pipe section. It has a form which has the characteristic of being made of synthetic resin, and is manufactured all at the same time from one end of the component to the other using mold molding or a 3D printer.

[0059] Furthermore, a PDO oval socket fitting or an EF oval socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, and is an oval socket fitting of various types that is formed by a 3D printer or molded, and is an oval socket fitting composed of a pipe stop plate arrangement groove, one pipe stop plate, one or more PDO wires or EF wires, two or more terminals and one or more indicators, and various PDO oval piping components that are connected are inserted on both sides of the pipe stop plate, and the right and left sides of the pipe stop plate have the form of a PDO oval piping component of a PDO oval socket fitting or EF oval socket fitting that has the characteristics of a PDO oval socket fitting or EF oval socket fitting that is fused by one or more PDO wires or EF wires respectively.

[0060] Furthermore, a PDO oval socket fitting or an EF oval socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, and is an oval socket fitting of various types that is formed by a 3D printer or a mold, and is an oval socket fitting composed of a pipe stop plate arrangement groove, one pipe stop plate, one or more PDO wires or EF wires, two or more terminals and one or more indicators, and various PDO oval piping components that are connected are inserted on both sides of the pipe stop plate, and the right and left sides of the pipe stop plate have the form of a PDO oval piping component of a PDO oval socket fitting or EF oval socket fitting that has the characteristics of a PDO oval socket fitting or EF oval socket fitting that is fused by two or more PDO wires or EF wires respectively.

[0061] In addition, PDO oval socket fittings and EF oval socket fittings can connect a variety of short and long pipes, making it possible to use only this socket even in multi-level piping, and the PDO oval socket fitting or EF oval socket fitting is a PDO oval piping component that has the characteristic of reducing the need for expensive fittings and cutting material costs.

[0062] Furthermore, a PDO oval elbow socket fitting or EF oval elbow socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, is 3D printed or molded, and is a PDO oval elbow fitting that has been turned at various angles such as 30 degrees or 45 degrees. The inner surface of the bent section is equipped with a reinforcing padding section similar to that of a long pipe or short pipe, and the padding section is stopped at a right angle to the pipe axis at the pipe insertion dimension position to form the pipe stop position. Various PDO oval piping materials to be connected are inserted at both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting, and the right and left ends are fused to each other with one or more PDO wires or EF wires, respectively, making it a PDO oval piping component of a PDO oval elbow socket fitting or EF oval elbow socket fitting.

[0063] Furthermore, fittings other than PDO oval sockets and PDO oval elbows are in the form of PDO oval piping components, which have the characteristic that they can also be used as T-shaped branch fittings and caps.

[0064] Furthermore, a PDO oval elbow socket fitting or EF oval elbow socket fitting has an oval outer shape composed of an upper and lower semicircular pipe section and a flat section, is 3D printed or molded, and is a PDO oval elbow fitting that can be turned at various angles such as 30 degrees or 45 degrees. The inner surface of the bent section is equipped with a reinforcing padding section similar to that of a long pipe or short pipe, and the padding section is stopped at a right angle to the pipe axis at the pipe insertion dimension position to form the pipe stop position. Various PDO oval piping materials to be connected are inserted at both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting, and the right and left ends are fused and connected by two or more PDO wires or EF wires, respectively, making it a PDO oval piping component of a PDO oval elbow socket fitting or EF oval elbow socket fitting.

[0065] Furthermore, when the diameter becomes large and the fusion area becomes large, and the length of the PDO or EF line becomes extremely long, by increasing the number of each line and dividing it into multiple blocks, it is possible to shorten the fusion time and construction time by using the form of PDO oval piping components of various socket fittings.

[0066] Furthermore, the materials of the various components of PDO oval piping components, excluding the metal or glass parts associated with the PDO and EF wires, are made of synthetic resins such as polyethylene or PVC, and are colored or colorless. The oval shape of the PDO oval piping components makes them suitable for a wide range of applications other than piping, such as low-load structural materials, fixtures, and decorative materials for buildings and structures.

[0067] Furthermore, when the material of long-pipe PDO oval piping components is made of metal such as aluminum or steel, their oval shape and reinforcing buildup on the flat surfaces give them the form of PDO oval piping components, which have the characteristics to be used as structural materials.

[0068] In addition, its PDO oval piping component form has the distinctive feature that it can be used in a wide range of fields, such as piping for transporting gases such as city gas and hydrogen, piping for transporting liquids such as water and wastewater, and protective pipes for communication and electrical cables.

[0069] Furthermore, its PDO oval piping component form has the unique feature that it can be used as a low-load structural material, fitting material, or decorative material in applications that were not possible with conventional plastic pipes.

[0070] Furthermore, long pipes that can be extruded can be supplied in metals such as aluminum and steel in addition to plastic, and are in the form of PDO oval piping components, which has the characteristic of expanding the range of applications for structural materials, etc. EXAMPLES

[0071] The present invention will be described in Example 1 with reference to Figures 1 to 11. The various piping components of the present invention, except for the PDO and EF wires and terminal fittings, are made of synthetic resins such as polyethylene and PVC, and are colored or colorless. In rare cases, they may be made of metals such as aluminum.

[0072] Next, Figure 1 (a) shows an overall three-dimensional view of a long-pipe PDO elliptical piping component 1 with a continuous curved reinforcing build-up section. (b) shows the plan view, front view, and side view of (a). The characteristic feature is its elliptical shape, and the reinforcing build-up section 2 is formed inside the flat section with continuous curved surfaces and flat surfaces (not shown) that are formed at the same time during extrusion molding.

[0073] Next, Figure 2 shows a plan view, a front view, and a side view of a long PDO oval piping component 1 having a continuous reinforcing rib-like build-up portion 5 formed inside the flat portion at the same time as it is extruded.

[0074] Next, Fig. 3 (c) shows a cross-section of the existing buried pipe 10. This is a diagram of the pipe diameter 11 to be replaced with the pipe diameter indicated by the two-dot chain line. (d) A cross-section of the excavation hole 18 and the drop-drilling hole 18 for inserting the larger diameter pipe 11 is shown. (e) A cross-section of the drop-drilling hole 19 of the long PDO oval pipe component 1 is shown.

[0075] Here, the projected area from the sky of 1 in (e) is the same as that of (c) existing buried pipe 10. DL shown in Figure 1 is the same, but WL is a longer oval shape, and the internal area through which the flow passes is significantly larger than that of a circular pipe with a DL diameter. However, the fluid coefficient is actually slightly less favorable than that of a circular pipe. However, it is clear and important that there is an advantage in that the flow rate can be increased while the projected area from the sky is the same.

[0076] When considering future locations for burying hydrogen transport pipes in addition to the current city gas pipes, various existing pipes exist and the space for new burial is limited. Therefore, the long-pipe PDO oval piping component 1 of the present invention can be used to its full potential to minimize the projected surface area from the sky and ensure the volume of transport, allowing new pipes to be buried.

[0077] Here, the long PDO oval piping component 1 in Figures 1 and 2 has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and is formed by extrusion molding which simultaneously forms various padding sections, such as a continuous curved reinforcing padding section 2 that has the strength to withstand internal pressure on the inner side of the flat section 9, or a continuous flat reinforcing padding section (not shown) or a continuous reinforcing rib-like padding section 5, and is supplied cut to the standard length L or the desired length.

[0078] This feature also allows the use of various PDO oval piping components that can be replaced with oval piping equivalent to larger diameter pipes without changing the projected area from the sky. A comparison of 10 in (c) and 1 in (e) in Figure 3 will explain this at a glance.

[0079] In addition, since the projected area from the sky is smaller than that of a large diameter circular pipe, it is possible to bury a pipe equivalent to a large diameter pipe in a narrow alleyway including many other buried pipes, even in a new construction. This can be explained by referring to 11 in (c) and 1 in (e) of Figure 3.

[0080] In addition, since the long axis 35, which is the right end of the twisted pipe 30 in Figure 4, can be buried horizontally, even if there is an obstacle below that cannot be removed, the PDO elliptical pipe 1, which is equivalent to a larger diameter pipe, can be laid horizontally as a long pipe above with the same soil covering (not shown).

[0081] Furthermore, even if the internal pressure of the pipe is high, the inner surface of the flat portion 9 can be provided with pressure-resistant reinforcing padding 2 or reinforcing rib-like padding 5, making it easy to prevent the flat portion 9 from expanding outward due to internal pressure.

[0082] Furthermore, the flat surface 9 is thicker than the curved reinforcing padding 2, and is effective in terms of strength and buckling resistance. Therefore, it can also be used as a structural material for extremely low loads.

[0083] Also, referring to 18 in (d) and 19 in (e) of Figure 3, excavation is performed on the right side 18 to the lower position of 14, and the pipe is lowered to the bottom of the hole. Next, an excavation hole 18 is required to move 11 from the right to the left. At the same time, hanging curing is required at the site to prevent the existing buried pipe 2 of 14 from falling. 11 that has been moved to the left is raised to the designed soil cover depth and fixed in the replacement position. In this way, large-scale excavation 18 required for dropping due to replacement, excavation under other buried objects 18, and hanging curing of other buried objects are no longer necessary, the amount of excavated soil is reduced, and the backfill compaction, roadbed and road surface restoration process, and pavement area can be reduced, which has a great effect on reducing construction costs and construction period, as well as the problem of the difficulty of compacting the backfill under 14.

[0084] In addition, the long PDO oval piping component 1 in Figure 1 is an invention that may be applicable to steel pipes in the future. This manufacturing method is not shown in the figure.

[0085] Furthermore, the long PDO oval piping component 1 in Figure 2 has an oval outer shape consisting of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and is a long pipe formed by extrusion molding in which one or more continuous reinforcing rib-like padding sections 5 that can withstand internal pressure are simultaneously formed on the inner surface of the flat section, and it is cut to a fixed length L or a desired length and supplied, making it easy to load when transporting the pipe material.

[0086] These extrusion molding processes take advantage of the manufacturing characteristics of extrusion molding to supply cheaper long plastic PDO oval piping components1, which not only reduces material costs but also has a significant effect on roadbed and road surface restoration work.

[0087] Furthermore, the long-pipe PDO elliptical piping component 1 has an elliptical outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and is also a long-pipe PDO elliptical piping component 1 formed by molding or by using a 3D printer, in which various continuous reinforcing padding sections 2 such as 2 and 5 that have internal pressure resistance are simultaneously formed on the inner surface of the flat section.

[0088] Furthermore, the materials of the various PDO oval piping components 1, 20, 30, 40, 50, 80, etc., except for the PDO and EF wires 27 and 28 and the metal or glass parts associated with them, are made of synthetic resins such as polyethylene or PVC, and are colored or colorless. This is a characteristic of long-tube PDO oval piping components 1, which can be used for a wide range of applications other than piping components, such as low-load fixtures and decorative materials for buildings and structures, taking advantage of their oval shape.

[0089] Furthermore, when the material of the long-pipe PDO oval piping component 1 is made of metal such as aluminum or steel, it can be used as a structural material due to its oval shape and the reinforcing padding 2 on the flat surface 9, and it is expected to be effective in preventing buckling, etc.

[0090] In addition, it is a PDO oval piping component that can be used in a wide range of fields, such as piping for transporting gases such as city gas and hydrogen, piping for transporting liquids such as water and wastewater, and protective pipes for communication and electrical cables.

[0091] Furthermore, due to the thickness of the flat surface and the oval shape, this PDO oval piping component has the advantage that it can be used as a low-load structural material, fitting material, or decorative material in applications that were not possible with conventional plastic pipes.

[0092] Colored and colorless plastic pipes are used for decoration and art, taking advantage of their thickness and twisted or bent shapes, eliminating the risk of deterioration over time due to corrosion.

[0093] Furthermore, for long pipes 1 etc. that can be extruded, metal long pipes can be supplied in addition to plastic ones, making it a PDO oval piping component with the characteristic of expanding the range of applications for structural materials, etc. Manufacturing methods that are separate from this invention are omitted here.

[0094] Next, Figure 4 shows an overall three-dimensional diagram of the twisted short pipe PDO oval piping component 30. At the left end of the figure, the long axis is facing vertically. While maintaining the same cross section, this long axis rotates slightly counterclockwise and moves to the right while twisting the pipe axis 35 to 36, 37, and 38. This part is the twisted part 32. This 32, the joint joint tip 31, and the joint joint end 33 make up the twisted short pipe PDO oval piping component 30. Twist angles of 15 degrees, 30 degrees, 45 degrees, and various other angles required on site can be supplied. In addition to standards, custom-made products can also be supplied for complex piping.

[0095] Next, the fitting joint tip 31 and fitting joint end 33 are connected to other pipes by inserting the pipe stop portion 23 and pipe stop plate 26 into various PDO oval piping components 20, 80, and 90, such as oval socket fittings or EF oval socket fittings (single type), into the straight pipe section without twisting of the twisted short pipe 30.

[0096] In addition, the twisted short pipe PDO oval piping component 30 is made of synthetic resin such as polyethylene or PVC, and is colored or colorless. The oval shape allows it to be used in a wide range of applications, such as low-load fixtures and decorative materials for buildings and structures, in addition to being used as piping components, and this is one of the features of the twisted short pipe PDO oval piping component 30.

[0097] Next, the manufacturing method of the twisted short pipe PDO oval piping component 30 has the characteristic that in addition to molding by metal mold, it is formed by a 3D printer.

[0098] In addition, a new manufacturing method that is being considered is a manufacturing method in which the extrusion molding speed and the speed of the receiving side that grabs and moves the extruded part are adjusted, and the receiving side is twisted with little deformation of the cross section while extrusion molding is performed. In addition to the speed, temperature control of heating and cooling of the extruded part is also important. (Not shown.)

[0099] Next, there is the fact that there are some disadvantages in terms of fluid coefficient, but when considering the advantages of the PDO oval piping component of the present invention, it is clear that these advantages will be necessary for future buried piping.

[0100] Furthermore, the twisted short pipe PDO oval piping component 30 has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and various continuous reinforcing padding sections 2 and 5 that have the strength to withstand internal pressure are simultaneously formed on the inner side of the flat section 9, and it is formed by adding twists of various angles such as 30 degrees and 45 degrees while maintaining the same cross-sectional shape around the pipe axis using a mold or a 3D printer.

[0101] In addition, by preparing various twist angles for the twisted short pipe PDO oval piping component 30, it is possible to create three-dimensional piping using only PDO oval socket fittings 20, 80, and 90, which reduces the number of various expensive fittings and therefore reduces material costs.

[0102] Furthermore, the twisted short pipe PDO oval piping component 30 has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and various continuous reinforcing padding sections 2 and 5 that have internal pressure resistance are simultaneously formed on the inner side of the flat section 9. It is twisted at various angles, such as 30 degrees or 45 degrees, while maintaining the same cross-sectional shape around the pipe axis, and is formed by mold molding or a 3D printer. The shape of one end of the PDO oval socket fitting or EF oval socket fitting 20, 80, or 90 without PDO wires and EF wires is simultaneously formed at both ends or one end of the twisted short pipe, and PDO wires and EF wires are arranged on the other side of the socket fitting, or as a post-process, a part of the oval socket fitting 20, 80, or 90 is fused with a PDO wire or EF wire to one end or both ends of the short pipe.

[0103] Next, Figure 5 shows the overall three-dimensional diagram of the short bent pipe PDO oval piping components 40 and 41. The middle part is omitted and the cross-sectional shapes of both ends are used for the general explanation.

[0104] Furthermore, the short bent PDO oval piping components 40 and 41 have an oval outer shape and are bent short pipe PDO oval piping components formed by a 3D printer or by a mold, and are provided with continuous curved reinforcing padding portions 2, flat reinforcing padding portions, and continuous reinforcing rib-like padding portions 5, which have continuous internal pressure resistance, formed simultaneously inside the flat portion 9, and are bent short pipe PDO oval piping components 40 and 41 whose direction is changed at various angles, such as 30 degrees or 45 degrees, on the short axis plane 49 or on the long axis plane 48.

[0105] Furthermore, the short bent PDO elliptical piping components 40 and 41 have an elliptical outer shape, and are short bent PDO elliptical piping components formed by 3D printer or mold. The short bent PDO elliptical piping components 40 and 41 have continuous curved reinforcing padding 2, flat reinforcing padding, and continuous reinforcing rib-like padding 5, which have continuous internal pressure resistance, formed simultaneously inside the flat portion 9, and are arranged in a PDO elliptical piping component with a direction changed at various angles such as 30 degrees or 45 degrees on the short axis plane 49 or the long axis plane 48. The PDO oval piping components 40 and 41 for bent short pipes are characterized in that they can be supplied as is, or the shape of one end of a PDO oval socket fitting 20 or an EF oval socket fitting 20 without PDO wires and EF wires is simultaneously formed at both ends or one end of the bent short pipe, and PDO wires and EF wires are arranged at the other end of the oval socket fitting 20, or a part of the oval socket fitting 20, 80 or 90 is fused to one end or both ends of the short pipe as a post-process before being supplied.

[0106] In addition, the short bent pipes PDO oval piping components 40 and 41 can be prepared with various bending angles and can be connected using only PDO oval socket joints 20, 80, and 90 to create three-dimensional piping, which has the advantage of reducing the number of various expensive joints.

[0107] In addition, the short bent PDO oval piping components 40 and 41 are made of synthetic resins such as polyethylene or PVC, and are colored or colorless. Taking advantage of their oval shape, they can be used for a wide range of applications, such as low-load fixtures and decorative materials for buildings and structures, in addition to being used as piping components.

[0108] Next, the manufacturing method of the short bent pipe PDO oval piping components 40 and 41 has the characteristic that they are formed by a 3D printer in addition to being molded by metal mold.

[0109] In addition, a new manufacturing method that is being considered is a manufacturing method in which the extrusion molding speed and the speed of the receiving side that grabs and moves the extruded part are adjusted, and the receiving side is twisted with little deformation of the cross section while extrusion molding is performed. In addition to the speed, temperature control of heating and cooling of the extruded part is also important. (Not shown.)

[0110] Next, it is true that the bent short pipe also has some disadvantages in terms of fluid coefficient, just like the twisted short pipe 30. However, considering the advantages of the PDO oval piping component of this invention, it is clear that the advantages will be necessary for future buried piping.

[0111] Furthermore, the short bent pipe PDO oval piping components 40 and 41 have an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8 and a flat section 9, and various continuous reinforcing padding sections 2 and 5 that have the strength to withstand internal pressure are simultaneously formed on the inner side of the flat section 9, and various bends such as 30 degrees and 45 degrees are added while maintaining the same cross-sectional shape around the pipe axis, and they are formed by molding or 3D printing.

[0112] Next, Figure 6 shows the overall three-dimensional view of the PDO oval piping component 50 with different diameter transition. Also, Figure 7 shows the plan view, front view, and side view of the PDO oval piping component 50 with different diameter transition. Please refer to both images at the same time.

[0113] Next, the PDO oval piping member 50 for connecting short pipes with different diameters is a member shown on the left side of the drawing, one end of which has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and on the inner side of the flat section 9, various continuous reinforcing padding sections 2 and 5 (see separate drawing for 5) that have internal pressure resistance are simultaneously formed, and has an oval outer shape, and a fitting connection oval section 51 having the shape of an oval straight pipe to be inserted into and fused to an oval socket fitting 20, 80, 90, etc., and a true circular pipe section 53 having the shape of a true circular straight pipe section to be inserted into and fused to a socket fitting or elbow fitting for connecting a general true circular straight pipe, and a different diameter transition section 52 where the diameter transitions from the fitting connection oval section on one end of the component to the circular pipe section.

[0114] Next, the various continuous reinforcing padding sections 2 and 5 on the inner surface of the flat section arranged in the oval connection section of the fitting move towards the circular pipe section, gradually decreasing in size, and reinforcing padding sections 2 and 5 disappear near the boundary between the circular pipe sections 52 and 53, where the wall of the circular pipe section 53 becomes thicker. This structure has the characteristic of being made of synthetic resin, and is manufactured all at the same time from one end of the part to the other by mold molding or a 3D printer.

[0115] In addition, the material of the PDO oval piping component 50 for the different diameter connection short pipe is made of synthetic resin such as polyethylene or PVC, and is colored or colorless.

[0116] Next, Fig. 8(f) shows the entire PDO oval piping component 20, which is an oval socket joint or an EF oval socket joint (single type). Also, Fig. 8(g) shows the front view, plan view, and side view.

[0117] Here, PDO wire uses various light rays such as laser beams and far infrared rays instead of electric current, so it can be fused safely even in a hazardous gas atmosphere, and the effect of the light rays also shortens the melting time of the welded part, so the time can be shortened even if the melting area is large. For example, it takes about an hour to fuse one part of a large-diameter 300 mm pipe with EF wire. By using PDO wire instead of EF wire, melting with far infrared rays or laser beams takes about 10 minutes instead of several minutes, which saves construction time.

[0118] In addition, with EF wire, the melting time can be shortened slightly by dividing it into multiple blocks as shown in Figure 9.

[0119] Next, the PDO oval socket fitting or EF oval socket fitting 20 has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8 and a flat section 9, and is an oval socket fitting 20 formed by 3D printing or molding. It is an oval socket fitting 20 composed of a pipe stop plate arrangement groove 25, one pipe stop plate 26, one or more PDO wires or EF wires 27 and 28, two or more terminals 21 and 22, and one or more indicators 24. Various PDO oval piping components 1 to be connected are inserted on both sides of the pipe stop plate 26, and the right and left sides of the pipe stop plate 26 are fused with one PDO wire or EF wire 27 and 28, respectively. It is a PDO oval piping component of the PDO oval socket fitting or EF oval socket fitting 20 having the characteristics of the PDO oval socket fitting or EF oval socket fitting 20.

[0120] In addition, the pipe stop plate 26 is temporarily fixed in the pipe stop plate groove 25 by the pipe stop plate claws 29. In addition, when connecting and fusing both ends of the insertion pipe, the sockets 20 and 80 arranged on both sides are removed from the pipe stop plate 26 temporarily fixed by 29, and moved temporarily toward the insertion pipe or the pipe to be connected, and after the insertion pipe is arranged, each socket 20 and 80 is returned to a position where it covers each pipe evenly toward the connection part, and the pipe and the insertion pipe can be fused.

[0121] Furthermore, the fusion parts of the PDO oval piping components 1 for various long and short pipes, the PDO oval piping components 50 for short pipes with different diameter connections, the PDO oval piping components 30 for twisted short pipes, the PDO oval piping components (long axis bent on a flat surface) 40 for short elbow pipes, and the PDO oval piping components (short axis bent on a flat surface) 41 for short elbow pipes are cleaned by cutting to remove oxides or by alcohol, etc. The fusion parts of various sockets, etc. can be cleaned with alcohol and then fused.

[0122] In addition, the pipes inserted into various sockets are inserted securely up to the pipe stop plate 26 of the pipe stop section 23. Also, the indicator 24 can be installed in places other than those shown in the figure to visually check the reliable fusion status.

[0123] In addition, the materials of the various PDO oval joints, represented by 20, 80, and 90 in Figures 8, 9, and 10, are as follows: the PDO wire, EF wire, and terminal are made of glass or metal, while the other parts of the body are made of polyethylene or PVC, and are colored or colorless.

[0124] Next, the sockets in Figures 8 and 10 are used for EF wires in conventional welding technology. For sockets for PDO wires, please refer to Patent Document 2, JP 2018-189158 PD Socket.

[0125] Next, Figure 9 illustrates the arrangement of multiple fusion lines on a large diameter pipe. Patent document 1, patent application 2017-100437 (patent registration 6463798), is an invention regarding a socket for a large diameter round pipe, and as an application example, it is applied to a long pipe PDO oval piping component 1 and a PDO oval socket joint or an EF oval socket joint (double type).

[0126] Furthermore, the PDO oval socket fitting or EF oval socket fitting (double type) 80 has an oval outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8, and a flat section 9, and is various oval socket fittings 80 formed by 3D printers or molds. The oval socket fitting 80 composed of a pipe stop plate arrangement groove 85, one pipe stop plate 86, one or more PDO wires or EF wires 87 and 88, two or more terminals 81 and 82, and one or more indicators 84 has various PDO oval piping components 1 to be connected inserted on both sides of the pipe stop plate 86, and is a PDO oval socket fitting or EF oval socket fitting 80 fused to the right and left sides of the pipe stop plate 86 by two or more PDO wires or EF wires 87 and 88, respectively.

[0127] In addition, PDO oval socket fittings or EF oval socket fittings 20 and 80 can connect a variety of short PDO oval piping components and long PDO oval piping components 1, so even when installing in a multi-level configuration, it is possible to use only this socket, which means that the need for expensive fittings is reduced and material costs are also reduced.

[0128] Next, Figure 10 illustrates a PDO elliptical elbow socket joint or EF elliptical elbow socket joint 90. The PDO elliptical elbow socket joint or EF elliptical elbow socket joint 90 has an elliptical outer shape consisting of an upper semicircular pipe section 7, a lower semicircular pipe section 8 and a flat section 9, is 3D printed or molded, and is a PDO elliptical elbow joint 90 whose direction is changed at various angles such as 30 degrees, 45 degrees, or 60 degrees, and has a reinforcing padding section 2 on the inner surface of the bent section similar to that of the PDO piping component 1 for the long pipe or the short pipe, and padding is applied at the pipe insertion dimension position. is stopped at a right angle to the pipe axis to form pipe stop position 23, and various PDO oval piping materials 1, 30, 40 and 50 to be connected are inserted into both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting 90, and the right and left ends are fused with one PDO wire or EF wire 27 and 28, respectively, to form a PDO oval piping component of a PDO oval elbow socket fitting or EF oval elbow socket fitting 90.

[0129] Furthermore, fittings other than the PDO oval sockets 20 and 80 and the PDO oval elbow 90 are PDO oval piping components that can also be used for T-shaped branch fittings and caps.

[0130] Furthermore, the PDO elliptical elbow socket joint or EF elliptical elbow socket joint 90 has an elliptical outer shape composed of an upper semicircular pipe section 7, a lower semicircular pipe section 8 and a flat section 9, is 3D printed or molded, and is a PDO elliptical elbow joint 90 whose direction is changed by 30 degrees, 45 degrees, 60 degrees, etc., and has a reinforcing padding section 2 on the inner surface of the bent section similar to that of a long pipe or a short pipe, and the padding section is stopped at a right angle to the pipe axis at the pipe insertion dimension position 23 to insert the pipe. The stop position is 23, and various PDO oval piping materials 1, 30, 40, and 50 to be connected are inserted into both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting 90, and the right and left ends are fused and connected by two or more PDO wires or EF wires 27 and 28, respectively, to form a PDO oval piping component of a PDO oval elbow socket fitting or EF oval elbow socket fitting.

[0131] Furthermore, 20, 80, and 90 have a large diameter and a large fusion area, and when the PDO or EF line is extremely long, the number of each line can be increased and divided into multiple blocks, which is effective in shortening the fusion time and shortening the construction time. See Figure 9 and Patent Application No. 2017-100437 (Patent Registration 6463798) in Patent Document 1.

[0132] Furthermore, the materials of the various components of PDO oval piping components, excluding the metal or glass parts associated with PDO and EF wires, are made of synthetic resins such as polyethylene or PVC, and are colored or colorless. The oval shape allows for a wide range of applications other than piping, such as low-load fixtures and decorative materials for buildings and structures.

[0133] Furthermore, when the long-pipe PDO oval piping component 1 is made of metal such as aluminum or steel, its oval shape and reinforcing padding on the flat surfaces 2 give it the characteristic of being usable as a structural material.

[0134] In addition, it is a PDO oval piping component that can be used in a wide range of fields, such as piping for transporting gases such as city gas and hydrogen, piping for transporting liquids such as water and wastewater, and protective pipes for communication and electrical cables.

[0135] Furthermore, it has the advantage that it can be used as a low-load structural material, construction material, or decorative material, which was not possible with conventional plastic pipes.

[0136] Furthermore, for long pipes such as PDO oval piping components 1 that can be extruded, it is possible to supply long pipes made of metal in addition to plastic, which has the advantage of expanding the range of applications for structural materials, etc. (Manufacturing method not shown) [Industrial Applicability]

[0137] This invention has the potential to be used as a low-load structural, construction, and decorative material, which was not possible with conventional plastic pipes.

[0138] Furthermore, by creating a manufacturing method for long metal pipes other than resin, it is possible to supply long oval pipes such as PDO oval piping components that can be extruded, which has the advantage of expanding the range of applications for structural materials, etc. (Manufacturing method not shown).

[0139] In addition, this invention is a domestic invention, and the spread of domestically produced TRON-based operating systems for manufacturing equipment, fusion equipment, and other devices will also contribute to the development of domestic industry. [Explanation of symbols]

[0140] 1 Long pipe PDO oval piping components 2 Curved reinforcement padding 3 Pipe wall thickness 5 Reinforcing rib-shaped padding 7 Upper semicircular tube 8 Lower semicircular tube 9 Plane part 10 Replacement of existing piping (gas, hydrogen, water, etc.) 11 New installation and replacement piping (gas, hydrogen, water, etc.) 13 Existing buried piping 1 (water, electricity, etc.) 14 Existing buried piping 2 (communications, sewage, etc.) 18 Drilling and drop drilling 19 Drop-in drilling hole 20 PDO oval piping components for oval socket joints or EF oval socket joints (single type) 21 Terminal 1 22 Terminal 2 23 Pipe stop 24 Indicators 25 Pipe stop plate groove 26 Pipe stop plate 27 PDO line 1 or EF line 1 28 PDO line 2 or EF line 2 29 Tube stopper plate jaw 30 Twisted short pipe PDO oval piping components 31 Joint joint tip 32 Twisted section 33 Joint joint end 34 Short axis 35 Long axis 36 Long axis rotation 1 37 Long axis rotation 2 38 Long axis rotation 3 39 End of long axis rotation 40 Elbow short pipe PDO oval piping component (bent on the long axis plane) 41 Elbow short pipe PDO oval piping component (bending on short axis plane) 43 Short axis 45 Long axis 48 Long axis plane 49 Minor axis plane 50 PDO oval piping components for short pipes with different diameters 51 Fitting connection oval section 52 Different diameter transition section 53 Round tube section 80 PDO oval piping components for oval socket joints or EF oval socket joints (double type) 81 Terminal 1 82 Terminal 2 84 Indicator 85 Pipe stop plate groove 86 Pipe stop plate 87 PDO line 1 and EF line 1 88 PDO line 2 and EF line 2 90 Elbow socket joint or EF elliptical elbow socket joint PDO elliptical piping component GL ground DL Outer diameter of true circle part WL Oval outer diameter L Long pipe PDO oval piping component length

Claims

1. A long-tube oval PDO piping component has an oval outer shape composed of an upper and lower semicircular tubular section and a flat section, and is a long tube formed by extrusion molding in which a continuous curved reinforcing buildup section capable of withstanding internal pressure, or a continuous flat reinforcing buildup section, is simultaneously formed on the inner surface of the flat section, and is characterized in that it can be cut to a fixed or desired length before supply.

2. The long-tube oval PDO piping component according to claim 1 has an oval outer shape composed of an upper semicircular tubular section, a lower semicircular tubular section, and a flat section, and is formed by extrusion molding in which one or more continuous reinforcing rib-like build-up sections capable of withstanding internal pressure are simultaneously formed on the inner surface of the flat section, and the long-tube oval PDO piping component according to claim 1 has the characteristic that it is supplied cut to a fixed or desired length.

3. The long-tube oval PDO piping component according to claims 1 to 2 has an oval outer shape composed of an upper semicircular tubular section, a lower semicircular tubular section, and a flat section, and is formed by molding using a die or a 3D printer, in which various continuous reinforcing padding sections that can withstand internal pressure are simultaneously formed on the inner surface of the flat section.

4. The twisted short pipe PDO oval piping component according to claims 1 to 3 has an oval outer shape composed of an upper semicircular pipe section, a lower semicircular pipe section, and a flat section, and various continuous reinforcing padding sections capable of withstanding internal pressure are simultaneously formed on the inner surface of the flat section, and the twisted short pipe is formed by adding a twist of 30 degrees, 45 degrees, etc. around the pipe axis while maintaining the same cross-sectional shape, and is formed by molding using a mold or a 3D printer.

5. The twisted short pipe PDO oval piping component has an oval outer shape composed of an upper semicircular pipe section, a lower semicircular pipe section, and a flat section, and various continuous reinforcing padding sections capable of withstanding internal pressure are simultaneously formed on the inner surface of the flat section, and twisted at an angle of 30 degrees, 45 degrees, etc. around the pipe axis while maintaining the same cross-sectional shape, and formed by mold molding or 3D printer, and the shape of one side of a PDO oval socket fitting or an EF oval socket fitting without PDO wires and EF wires is simultaneously formed at both ends or one end of the twisted short pipe, and PDO wires and EF wires are provided on the other side of the socket fitting, or a part of the oval socket fitting is fused to one end or both ends of the short pipe with a PDO wire or EF wire as a post-process and supplied.

6. The bent short pipe oval PDO piping component is a short pipe having an oval outer shape, which is formed by a 3D printer or a mold, and which has continuous curved reinforcing buildup, flat reinforcing buildup, or continuous reinforcing rib-like buildup sections that are capable of withstanding continuous internal pressure and are simultaneously formed inside the flat parts, and which has the characteristic of changing direction at various angles, such as 30 degrees or 45 degrees, on the short axis plane or the long axis plane. The bent short pipe oval PDO piping component according to claims 1 to 5.

7. The PDO oval piping component of the bent short pipe is a short pipe having an oval outer shape and formed by a 3D printer or a mold, and has continuous curved reinforcing buildup, flat reinforcing buildup, or continuous reinforcing rib-like buildup sections that have continuous internal pressure resistance and are simultaneously formed inside the flat section, and is a bent short pipe whose direction is changed at various angles such as 30 degrees or 45 degrees on the short axis plane or the long axis plane, and at both ends or one end of the bent short pipe, the shape of one side of a PDO oval socket fitting or an EF oval socket fitting without a PDO wire and an EF wire is simultaneously formed, and the other end of the oval socket fitting is provided with a PDO wire and an EF wire, or a part of the oval socket fitting is fused to one end or both ends of the short pipe as a post-process. The PDO oval piping component of the bent short pipe according to claims 1 to 6.

8. The PDO oval piping component of the different diameter connection short pipe has an oval outer shape at one end side of the component composed of an upper semicircular pipe section, a lower semicircular pipe section and a flat section, and has an oval outer shape formed simultaneously with various continuous reinforcing padding sections having internal pressure resistance on the inner surface side of the flat section, and has a fitting connection oval section having the shape of an oval straight pipe that is inserted into and fused to an oval socket fitting; and a true circular pipe portion having a shape of a true circular straight pipe portion, the other end of which is inserted into and fused to a socket joint or elbow joint for connecting a general true circular straight pipe, and a transitional section where the diameter changes from the oval joint section at one end of the member to the circular pipe section. The oval PDO piping component according to any one of claims 1 to 7, characterized in that various continuous reinforcing build-up portions on the inner surface of the flat portion disposed in the oval joint connection portion gradually decrease in thickness as they move to the circular pipe portion and disappear immediately adjacent to the circular pipe portion, thereby becoming the thick wall of the circular pipe portion, and that the component is made of synthetic resin and is manufactured simultaneously from one end of the component to the other end by mold molding or a 3D printer.

9. The PDO oval socket fitting or EF oval socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, and is one of various oval socket fittings formed by 3D printers or molds. The oval socket fitting is composed of a pipe stop plate arrangement groove, one pipe stop plate, one or more PDO wires or EF wires, two or more terminals, and one or more indicators, and various PDO oval piping components to be connected are inserted on both sides of the pipe stop plate, and the right and left sides of the pipe stop plate are fused to each other by one PDO wire or EF wire, respectively. A PDO oval socket fitting or EF oval socket fitting according to claims 1 to 8,

10. The PDO oval socket fitting or EF oval socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, and is one of various oval socket fittings formed by 3D printers or molds. The oval socket fitting is composed of a pipe stop plate arrangement groove, one pipe stop plate, one or more PDO wires or EF wires, two or more terminals, and one or more indicators, and various PDO oval piping components to be connected are inserted on both sides of the pipe stop plate, and the right and left sides of the pipe stop plate are fused to each other by two or more PDO wires or EF wires, respectively. A PDO oval socket fitting or EF oval socket fitting according to claims 1 to 9,

11. The PDO oval elbow socket fitting or EF oval elbow socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, is 3D printer molded or molded, and is a PDO oval elbow fitting whose direction is changed by 30 degrees, 45 degrees, etc., has a reinforcing padding section similar to that of a long pipe or short pipe on the inner surface of the bent section, and the padding is stopped perpendicular to the pipe axis at the pipe insertion dimension position to form the pipe stop position, and various PDO oval piping materials to be connected are inserted into both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting, and the right end and left end sides are fused to each other with a single PDO wire or EF wire, respectively. A PDO oval piping component according to claims 1 to 10.

12. A PDO oval elbow socket fitting or an EF oval elbow socket fitting has an oval outer shape composed of an upper semicircular pipe section and a lower semicircular pipe section and a flat section, is 3D printer molded or molded, and is a PDO oval elbow fitting whose direction is changed by 30 degrees, 45 degrees, etc., has a reinforcing padding section similar to that of a long pipe or short pipe on the inner surface of the bent section, and the padding is stopped perpendicular to the pipe axis at the pipe insertion dimension position to form the pipe stop position, and various PDO oval piping materials to be connected are inserted into both ends of the PDO oval elbow socket fitting or EF oval elbow socket fitting, and is connected by fusion with two or more PDO wires or EF wires on the right end side and the left end side, respectively. A PDO oval piping component according to claims 1 to 11.

13. The oval PDO piping component according to claims 1 to 12 has the characteristic that it can be used in a wide range of fields, such as piping for transporting gases such as city gas and hydrogen, liquids such as water and wastewater, and protective pipes for communications and electricity.

14. The oval PDO piping component according to any one of claims 1 to 13, characterized in that it can be used as a low-load construction material or decorative material.

15. The PDO oval piping component mainly made of PDO wire has a feature clearly classified with various technologies and component names by using the prefix PDO as described in claims 1 to 14.

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