KR101093180B1 - Double wall plastic pipe - Google Patents

Abstract

PURPOSE: A dual-wall synthetic resin pipe is provided to reduce damage by impact and radial force by supporting outer side and inner side of a hollow pipe using a reinforcing member. CONSTITUTION: A dual-wall synthetic resin pipe comprises a hollow pipe(20), bonding resin(30), a reinforcing member(40), and an outer cover. The hollow pipe is wound in a tube-wall(14) a spiral form. The inside flow path is formed inside the hollow pipe. The bonding resin is spread between the sides of the hollow pipe in order to block up a clearance. The bonding resin is made of synthetic resin reinforced with reinforced fibers of 10~100wt.% based on synthetic resin of 100wt.%. The reinforcing member is inserted into the internal space of the hollow pipe in order to reinforce strength against radial load. A plurality of supporting plates(42) of the reinforcing member interlinks the outer cover and inner cover of the hollow pipe. The outer cover surrounds the outer surface of the tube-wall.

Description

Double Wall Synthetic Resin Pipe {DOUBLE WALL PLASTIC PIPE}

The present invention relates to a double-walled synthetic resin pipe, and more particularly to a double-walled synthetic resin pipe reinforced by inserting a reinforcing member for strength reinforcement inside the hollow tube forming the pipe wall.

In general, synthetic resin pipes are not corroded to sewage, wastewater, seawater and chemicals, and can be used semi-permanently because they do not rust or decay in corrosive substances present in the soil. In addition, it is resistant to external shocks and external pressures and has a low risk of breakage even in ground subsidence, which is suitable for landfilling.

Synthetic resin pipes are manufactured in various structures to reduce the raw material and have a relatively strong strength, and the representative one of them is the double wall synthetic resin pipe. Double-walled synthetic resin pipes are used as sewage pipes or storm pipes to guide the flow of fluid in a certain direction to reach a destination, and they are usually installed underground without being exposed to the surface of the earth.

The double walled synthetic resin pipe is manufactured through processes such as extrusion, molding, cooling, drawing, cutting, etc., and in order to obtain high strength while using less material, it is necessary to create an appropriate atmosphere for stable plastic deformation of structural materials. Looking at the process of manufacturing a double-walled synthetic resin pipe as follows.

First, a square hollow tube is formed in a mold while heating the synthetic resin. The molded hollow tube is cooled to maintain its shape and spirally wound on the outside of the rotating drum. When the hollow tube is spirally wound, a circular double walled synthetic resin tube can be formed by supplying a molten bonded resin between the hollow tubes.

However, in the conventional double walled synthetic resin pipe, the hollow pipe forming the pipe wall is hollow, so that the pipe wall may be cracked due to the load or external impact from the ground.

In addition, there is a problem that the strength is weak at the junction point connecting the hollow tube by supplying the molten joint resin between the hollow tube.

Since the double-walled synthetic resin pipe is installed in the ground, if a crack or damage occurs in the pipe wall or the junction point, it is difficult to find it, and even if a problem is found, it is difficult to repair or replace it. For this reason, various attempts have been made to reinforce the strength of the double wall synthetic resin pipe.

The present invention has been made in view of this point, and an object of the present invention is to provide a double-walled synthetic resin pipe that can reduce the risk of breakage due to load or external impact by reinforcing the strength of the pipe wall and the junction point.

Double wall synthetic resin tube according to an aspect of the present invention for achieving the above object is that a joint resin is applied between the sides of the spirally wound hollow tube is provided with an inner flow path through which fluid can flow, radial load In order to reinforce the strength of the reinforcing member is inserted into the inner space of the hollow tube is connected to a plurality of support plates for connecting the outer surface and the inner surface of the hollow tube continuously.

The reinforcing member may be connected to the plurality of support plates in a zigzag form.

The plurality of support plates may be disposed to be perpendicular to the outer surface and the inner surface of the hollow tube.

The double-walled synthetic resin tube according to another aspect of the present invention for achieving the above object is a hollow tube, which forms a pipe wall provided with an inner flow path through which the fluid flows inside the spiral, between the sides of the hollow tube spirally wound Bonded resin applied to block the gap of the tube wall, a plurality of support plates inserted into the inner space of the hollow tube and connected between the outer surface and the inner surface of the hollow tube to reinforce the strength against the radial load of the tube wall are continuously connected It includes a reinforcing member, the shell surrounding the outer surface of the tube wall.

The outer shell may be made of synthetic resin.

The bonding resin may be made of a synthetic resin reinforced with reinforcing fibers.

Double wall synthetic resin pipe according to the present invention is because the reinforcing member is disposed inside the hollow tube forming the pipe wall to support the outer surface and the inner surface of the hollow tube, it is very resistant to radial load or impact and there is little risk of breakage, Strength can be further improved by contacting with synthetic resin reinforced with reinforcing fibers.

In addition, because it is resistant to radial load, even if used for a long time, there is little risk of leakage of fluid through this, it is possible to increase the reliability of the product.

1 is a perspective view showing a partially cut double-walled synthetic resin tube according to an embodiment of the present invention.
Figure 2 is a side view showing a partially cut double wall synthetic resin tube according to an embodiment of the present invention.
3 is a perspective view showing a portion of the double-walled synthetic resin pipe according to an embodiment of the present invention.
Figure 4 is a perspective view showing a partially cut double-walled synthetic resin tube according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in detail with respect to the double-wall synthetic resin tube according to an embodiment of the present invention.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

As shown in Figures 1 to 3, the double-walled synthetic resin tube 10 according to an embodiment of the present invention is a spiral-wound hollow tube 20, the joint resin 30 is applied between the hollow tube 20 And a reinforcing member 40 inserted into the hollow tube 20. Inside the double-walled synthetic resin tube 10 is provided with an internal flow path 12 through which fluid can flow.

The hollow tube 20 has a substantially rectangular cross section, and is wound spirally so that adjacent sides thereof are in contact with each other to form a tube wall 14 of a circular double wall synthetic resin tube 10. The inner space 22 is provided inside the hollow tube 20. Bonding resin 30 is applied between the adjacent side of the hollow tube 20 to prevent the gap between the side of the hollow tube (20).

As the bonding resin 30, pure synthetic resin or synthetic resin reinforced with reinforcing fibers may be used. Using synthetic resin reinforced with reinforcing fibers can further improve the strength of the double wall synthetic resin tube 10.

When using a synthetic resin reinforced with a reinforcing fiber as a bonding resin, the ratio of the synthetic resin and the reinforcing fiber is preferably in the range of 10 to 100 parts by weight of the reinforcing fiber based on 100 parts by weight of the synthetic resin. When the ratio of the reinforcing fiber is less than 10 parts by weight, there is a problem that the strength reinforcing effect to be achieved cannot be sufficiently exerted, and when the ratio of the reinforcing fiber exceeds 100 parts by weight, the bonding force is relatively low, and thus the joint is opened or dropped. It is not suitable because of the possibility of problems.

The reinforcing fibers include natural fibers, glass fibers, carbon fibers, graphite fibers, metal fibers, aramid fibers, Pan (Polyacrylonitrile) fibers, arylene fibers, PEEK (Poly Ether Ether Ketone) fibers, rayon fibers, basalt fibers and these Mixtures of fibers and the like can be used.

As shown in FIG. 3, the reinforcing member 40 is inserted into the inner space 22 of the hollow tube 20. The reinforcing member 40 is for reinforcing the strength of the pipe wall 14 with respect to the radial load of the double-walled synthetic resin pipe 10, and includes a plurality of support plates 42.

The support plate 42 is continuously connected in a zigzag shape to form the reinforcing member 40. Each support plate 42 connects the outer surface 24 and the inner surface 26 of the hollow tube 20 to distribute the load applied to the outside of the tube wall 14. In order to increase the strength reinforcement efficiency of the pipe wall 14 by the reinforcing member 40, the support plate 42 is preferably arranged perpendicular to the outer surface 24 and the inner surface 26. Here, the outer surface 24 of the hollow tube 20 is a surface disposed on the outer side in the radial direction of the double-walled synthetic resin tube 10, the inner surface 26 of the hollow tube 20 is relatively relative to the outer surface 24 The surface arrange | positioned inside is shown.

The reinforcing member 40 may be formed of a synthetic resin and inserted into the inner space 22 of the hollow tube 20 when the hollow tube 20 is extruded. Of course, the material of the reinforcing member 40 need not be limited to synthetic resin, and inserted into the inner space 22 of the hollow tube 20 to support the outer surface 24 and the inner surface 26 of the hollow tube 20. Various materials may be used to provide the strength that can be achieved.

In the process of inserting the reinforcing member 40 into the inner space 22 of the hollow tube 20, adhesive on both ends of the support plate 42 in contact with the outer surface 24 and the inner surface 26 of the hollow tube 20 It is also possible to insert the reinforcing member 40 into the inner space 22 of the hollow tube 20 by applying the support plate 42 is attached to the outer surface 24 and the inner surface 26 of the hollow tube 20 By doing so, it can be made more stable perpendicular to the outer surface 24 and the inner surface 26. In addition, the reinforcing member 40 is made of a synthetic resin and is extrusion molded at the same time as the extrusion process of the hollow tube 20 is inserted into the hollow tube 20 can be integrally combined with the uncooled hollow tube 20.

In addition, although the support plate 42 constituting the reinforcing member 40 is shown to be somewhat separated from the inner surface of the hollow tube 20 in the drawing, the support plate 42 is the outer surface 24 and the inner surface of the hollow tube 20. (26) as well as may be made in size and shape in contact with both inner surfaces of the hollow tube (20).

In addition to this method, the double wall synthetic resin tube 10 according to an embodiment of the present invention may be manufactured by various methods.

Figure 4 shows a double-walled synthetic resin tube according to another embodiment of the present invention.

The double-walled synthetic resin tube 50 shown in Figure 4 is wound in a spiral to form a hollow tube 20, a hollow tube 20, the inner side of the hollow tube 20 is provided with an inner flow passage 12 through which fluid can flow Bonding resin 30 is applied between the gap between the pipe wall 14, the reinforcing member 40 is inserted into the inner space of the hollow tube 20 to reinforce the strength against the radial load of the pipe wall 14, It includes a shell 51 surrounding the outer surface of the tube wall 14. Here, the hollow tube 20, the joint resin 30, the reinforcing member 40 is the same as the double-walled synthetic resin tube 10 according to an embodiment of the present invention, so description thereof will be omitted.

The outer shell 51 is made of a synthetic resin material to wrap the tube wall 14, thereby improving the strength and durability of the double wall synthetic resin tube 50. That is, by not directly exposing the tube wall 14, the tube wall 14 can be protected from physical damage from the outside, and the strength and durability can be improved by playing a role of distributing the load. In addition, even if fluid leaks from the pipe wall and the joint part due to cracks in the pipe wall and the joint part, the outer shell completely surrounds the pipe wall, thereby preventing the fluid from leaking to the outside.

The double wall synthetic resin pipe according to the present invention described above is provided with a reinforcing member 40 inside the hollow tube 20 forming the pipe wall to support the outer surface 24 and the inner surface 26 of the hollow tube 20. Therefore, it is very resistant to the radial load or impact of the double-walled synthetic resin pipe, and there is little risk of breakage, thereby increasing the reliability of the product.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

10,50: double wall synthetic resin pipe 12: internal flow path
14: pipe wall 20: hollow tube
22: inside space 24: outside
26: inner surface 30: bonded resin
40: reinforcing member 42: support plate
51: jacket

Claims (9)

delete delete delete A hollow tube spirally wound to form a pipe wall for providing an inner flow path through which a fluid can flow;
It is applied between the sides of the hollow pipe spirally wound to prevent the gap of the pipe wall, the joint resin made of a synthetic resin reinforced with 10 to 100 parts by weight of reinforcing fibers based on 100 parts by weight of synthetic resin;
A reinforcing member inserted into an inner space of the hollow tube to reinforce strength against a radial load of the tube wall, and having a plurality of support plates continuously connected to the outer and inner surfaces of the hollow tube; And
Double wall synthetic resin tube comprising a; covering the outer surface of the pipe wall.
The method of claim 4, wherein
The reinforcing member is a double wall synthetic resin tube, characterized in that the plurality of supporting plates are connected in a zigzag form.
The method of claim 4, wherein
The plurality of support plates is a double-walled synthetic resin tube, characterized in that arranged to be perpendicular to the outer surface and the inner surface of the hollow tube.
delete delete The method of claim 4, wherein
The reinforcing fibers, natural fibers, glass fibers, carbon fibers, graphite fibers, metal fibers, aramid fibers, Pan (Polyacrylonitrile) fibers, arylene fibers, PEEK (Poly Ether Ether Ketone) fibers, rayon fibers, basalt fibers and these Double wall synthetic resin tube, characterized in that selected from the mixture of.

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