Plastic S-shaped supporting rib winding reinforced corrugated pipe

Abstract

The utility model relates to a plastic S-shaped supporting rib winding reinforced corrugated pipe which comprises a pipe body and a plastic corrugated profile, the plastic corrugated profile is spirally wound on the outer side of the pipe body to form an outer corrugated shape, and the plastic corrugated profile comprises a hollow body and a plastic S-shaped supporting rib. The plastic S-shaped supporting rib is located in the body and divides a cavity in the body into two parts, the plastic S-shaped supporting rib is provided with a continuous bent face, and the upper bent face and the lower bent face of the plastic S-shaped supporting rib are connected with the upper end and the lower end of the body. The pipe is high in ring stiffness, resistant to abrasion and fracture and easy to manufacture, and the drainage pipe manufactured through the pipe is stable in whole structure, high in ring stiffness, light in weight per meter and suitable for producing pipes with large calibers.

Description

[Technical Field]

[0001] This utility model relates to a spiral corrugated pipe, which is a type of buried pipe and is widely used in the laying of various drainage pipes. [Background Technology]

[0002] Chinese patent number ZL 201220119995.X, entitled "A Strip and its Preparation of an Internally Ribbed Reinforced Spiral Winding Tube," discloses a strip comprising a face sheet, an arc-shaped body, and vertical ribs. The arc-shaped body is located outside the face sheet and forms a cavity between the face sheet and the arc-shaped body. The vertical ribs are located in the cavity between the arc-shaped body and the face sheet and divide the cavity in two. The two sides of the face sheet are overlapping portions. The face sheet, arc-shaped body, and vertical ribs in the strip are formed by a single extrusion molding process. The tube body is a tubular body formed by winding and fusion welding the strip. The arc-shaped body forms an outer corrugated shape on the outside of the tube body, and pipe joints are plastic-welded to both ends of the tube body.

[0003] The aforementioned strip and the internally ribbed reinforced spiral wound tubes prepared therefrom have the following defects:

[0004] 1. Because the extruded material is a hollow strip with overlapping edges, the heat inside the hollow cavity cannot be released during the production of the strip. In addition, the overlapping parts and vertical ribs on both sides need to be formed, so the production speed of this strip will be very slow and cannot achieve real benefits.

[0005] 2. Since the strip is pre-formed and then the two sides of the cold strip are overlapped and welded to form the pipe, the overlap part of the pipe is the weakest point and is exposed on the outside of the pipe. It is greatly affected by changes in climate temperature, transportation and installation. The tensile strength of the overlap part is insufficient and it is easy to break, and the corrugation is spring-like.

[0006] 3. The ring stiffness of this pipe mainly depends on the thickness of the vertical ribs. However, increasing the thickness of the vertical ribs will inevitably lead to an increase in the weight per meter of the pipe. This is a contradiction and a difficult problem that has always been difficult to overcome in the field of spiral corrugated pipes.

[0007] Chinese Patent No. 201110121186.2, entitled "Inner Rib Reinforced Outer Corrugated Plastic Spiral Wound Structure Wall Pipe and its Manufacturing Method," discloses an inner rib reinforced corrugated plastic spiral wound structure wall pipe. This pipe is formed by spirally winding and fusion-bonding tubular protrusions with hollow cavities on both sides of the plastic profiled strip. The two hollow cavities between adjacent spirally wound plastic profiled strips are fused together to form hollow reinforcing ribs. An upright reinforcing inner rib is formed at the fusion point in the middle of the hollow reinforcing rib. The pipe body includes a cylindrical pipe wall, a spirally wound hollow reinforcing rib, and a reinforcing inner rib perpendicular to the pipe wall located within the hollow reinforcing rib. The reinforcing inner rib divides the hollow reinforcing rib into two parallel hollow cavities, and the fusion joint is located at the reinforcing inner rib. The tube is formed by spirally winding and fusion bonding of plastic profiled strips with tubular protrusions containing hollow cavities on both sides. The two hollow cavities between adjacent spirally wound plastic profiled strips are fused together to form hollow reinforcing ribs, and vertical reinforcing inner ribs are formed at the fusion part in the middle of the hollow reinforcing ribs.

[0008] The aforementioned internally ribbed, externally corrugated plastic spiral wound structured wall pipe and its manufacturing method have the following defects:

[0009] 1. Its welding surface is the entire circumferential cross-section, which reduces the ring stiffness of the structural wall pipe. If the process is not properly controlled, it is easy to cause insufficient tensile strength of the pipe, making it easy to break, and the corrugations will be spring-like.

[0010] 2. The materials used in the molten adhesive and the pipe materials are different. The difference in tensile strength between the two materials will lead to a decrease in hot melt strength and affect the ring flexibility of the structural wall pipe.

[0011] 3. The reinforcing inner ribs are formed by molten adhesive, which results in inconsistent width of the reinforcing inner ribs. This means that the ring stiffness of the entire structural wall pipe cannot be guaranteed, and the weight per meter of the pipe increases. [Utility Model Content]

[0012] To address the aforementioned problems, the purpose of this utility model is to provide a plastic S-shaped support rib wound reinforced corrugated pipe, which is a pipe with high ring stiffness, wear resistance, fracture resistance, and easy manufacturing. Drainage pipes manufactured using this material have a stable overall structure, high ring stiffness, and light weight per meter, making them suitable for producing pipes with larger diameters.

[0013] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a plastic S-shaped support rib wound reinforced corrugated pipe, comprising a pipe body and a plastic corrugated profile, wherein the plastic corrugated profile is spirally wound on the outside of the pipe body to form an outer corrugated shape, the plastic corrugated profile comprising a hollow body and plastic S-shaped support ribs, the plastic S-shaped support ribs being located in the body and dividing the cavity inside the body into two, the plastic S-shaped support ribs having continuous bending surfaces, and the upper and lower bending surfaces of the plastic S-shaped support ribs being connected to the upper and lower ends of the body.

[0014] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured such that the width of the upper and lower bending surfaces of the plastic S-shaped support rib matches the upper and lower end faces of the main body. The width of the upper and lower bending surfaces of the plastic S-shaped support rib is determined by the required ring stiffness of the pipe; the wider the bending surface, the higher the ring stiffness of the pipe.

[0015] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured as follows: an upper positioning groove is provided at the upper end of the main body, and a lower positioning groove is provided at the lower end of the plastic corrugated profile, the width of the upper positioning groove and the lower positioning groove matching the width of the plastic S-shaped support rib.

[0016] The plastic S-shaped support rib winding reinforced corrugated pipe of this utility model is further configured such that: the body and the plastic S-shaped support rib are co-extruded composite molded, and the upper positioning groove and the lower positioning groove are fused with the plastic S-shaped support rib as one piece.

[0017] The plastic S-shaped support rib winding reinforced corrugated pipe of this utility model is further configured such that: the plastic S-shaped support rib is provided with through holes parallel to the rib body.

[0018] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured such that: the plastic S-shaped support rib has a side hole in the plate surface.

[0019] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured as follows: the pipe body is a tubular body formed by hot winding and welding of plastic sheet, and the bottom of the plastic corrugated profile is fused with the plastic sheet at the welding point and then wound together to form a corrugated pipe.

[0020] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured such that: the middle part of the bottom of the plastic corrugated profile is thermally fused with the weld seam of the plastic sheet.

[0021] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured such that the connection method of the pipe is a one-time injection molded socket and spigot structure.

[0022] The plastic S-shaped support rib wound reinforced corrugated pipe of this utility model is further configured such that the two sides of the plastic sheet adopt an interlocking structure with upper and lower overlaps.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The plastic S-shaped support ribs are formed first, so that the bending angle and height can be determined according to the required ring stiffness of the corrugated pipe, that is, the width and height of the plastic S-shaped support ribs after bending are determined, thereby ensuring the ring stiffness of the corrugated pipe. The plastic S-shaped support ribs and the body are co-extruded and compounded, which not only facilitates heat dissipation, but also greatly improves the extrusion production speed.

[0025] 2. The upper and lower ends of the corrugated plastic profile are respectively provided with upper positioning grooves and lower positioning grooves. When the corrugated plastic profile and the plastic S-shaped support rib are made of the same material, they can achieve stable fusion. Even when the corrugated plastic profile and the plastic S-shaped support rib are made of different materials, the presence of the upper and lower positioning grooves can ensure that they can be reliably connected, thereby effectively preventing the corrugated plastic profile from collapsing due to torsional force during spiral winding.

[0026] 3. The middle part of the bottom of the plastic corrugated profile is hot-fused and wrapped with the plastic sheet at the connection point, thereby effectively hot-forming the weak part of the corrugated pipe, which greatly improves the strength and axial pull-out force of the corrugated pipe.

[0027] 4. The plastic S-shaped support ribs are provided with through holes parallel to the rib body or with side holes located in the plate surface, which reduces the weight per meter of the plastic S-shaped support ribs per unit length, thereby reducing the weight per meter of the corrugated pipe.

[0028] 5. The continuous wave formed by the plastic S-shaped support ribs after bending creates a triangular support force; the support strength increases with the bending angle, and is 2 to 3 times that of the original plate of the same thickness; because the plastic S-shaped support ribs are a continuous wave shape, they can extend with bending during the bending and winding process without affecting the ring stiffness of the pipe, reducing the risk of the entire pipe losing ring stiffness due to excessive yield force on the support ribs during spiral winding; in practice, the ring stiffness of the plastic S-shaped support ribs wound and reinforced corrugated pipe of the same diameter is 1.5 to 2 times stronger than that of the currently used wound corrugated pipe; and under the premise of the same diameter pipe and the same ring stiffness, the same raw materials are saved by 13-30%, making a contribution to society. [Attached Image Description]

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] Figure 2 yes Figure 1Enlarged structural diagram of section A in the middle;

[0031] Figure 3 yes Figure 1 Enlarged structural diagram of section B in the middle;

[0032] Figure 4 This is a schematic diagram of the structure of the plastic S-shaped support rib in this utility model;

[0033] Figure 5 This is another structural schematic diagram of the plastic S-shaped support rib in this utility model;

[0034] Figure 6 This is another structural schematic diagram of the plastic S-shaped support rib in this utility model;

[0035] In the diagram: 1. Pipe body, 2. Corrugated plastic profile, 3. Body, 4. Plastic S-shaped support rib, 41. Side, 42. Bending surface, 5. Through hole, 6. Upper positioning groove, 7. Lower positioning groove, 8. Side hole.

Detailed Implementation Methods

[0036] The following detailed description of a plastic S-shaped support rib wound reinforced corrugated pipe according to the present invention will be provided through specific embodiments.

[0037] like Figure 1 As shown, a plastic S-shaped support rib wound reinforced corrugated pipe includes a pipe body 1 and a plastic corrugated profile 2. The plastic corrugated profile 2 is spirally wound around the outside of the pipe body 1 to form an outer corrugated shape. The plastic corrugated profile 2 includes a hollow body 3 and plastic S-shaped support ribs 4, as shown. Figure 3 As shown, the plastic S-shaped support rib 4 is located in the body 3 and divides the cavity inside the body 3 into two parts, as... Figure 4 , Figure 5 , Figure 6 As shown, the plastic S-shaped support rib 4 has a continuous bending surface 42, and the upper and lower bending surfaces 42 of the plastic S-shaped support rib 4 are connected to the upper and lower ends of the body 3.

[0038] As a preferred option, such as Figure 2 , Figure 3 As shown, the width of the upper and lower bending surfaces 42 of the plastic S-shaped support rib 4 matches the upper and lower end faces of the body 3. This provides the strongest support to the body of the plastic corrugated profile 2, improving the overall ring stiffness of the pipe 1. The width of the upper and lower bending surfaces 42 of the plastic S-shaped support rib 4 is determined by the required ring stiffness of the pipe; the wider the bending surface, the higher the ring stiffness of the pipe.

[0039] As a preferred option, such as Figure 3As shown, the upper end of the main body 3 is provided with an upper positioning groove 6, and the lower end of the plastic corrugated profile 2 is provided with a lower positioning groove 7. The widths of the upper positioning groove 6 and the lower positioning groove 7 are matched with the width of the plastic S-shaped support rib. The upper and lower ends of the plastic corrugated profile 2 are respectively provided with upper positioning groove 6 and lower positioning groove 7. When the plastic corrugated profile 2 and the plastic S-shaped support rib 4 are made of the same material, they can achieve stable fusion. Even when the plastic corrugated profile 2 and the plastic S-shaped support rib 4 are made of different materials, the presence of the upper positioning groove 6 and the lower positioning groove 7 ensures a reliable connection, effectively preventing the plastic corrugated profile 2 from collapsing due to torsional force during spiral winding.

[0040] As a preferred embodiment, the body 3 and the plastic S-shaped support rib 4 are co-extruded composite molded, and the upper positioning groove 6 and the lower positioning groove 7 are fused together with the plastic S-shaped support rib 4.

[0041] In this embodiment, as a preferred solution, such as Figure 5 As shown, the plastic S-shaped support rib 4 is provided with through holes 5 parallel to the rib body. The through holes 5 reduce the weight per meter of the plastic S-shaped support rib 4 per unit length, thereby reducing the weight per meter of the corrugated pipe. As another embodiment of this application, as... Figure 6 As shown, a side hole 8 is provided in the side 41 of the plastic S-shaped support rib 4. The side hole 8 can also reduce the weight per meter of the plastic S-shaped support rib 4 per unit length, thereby reducing the weight per meter of the corrugated pipe.

[0042] In this embodiment, as Figure 3 As shown, the tube body 1 is a tubular body formed by hot winding and welding of plastic sheets. The bottom center of the plastic corrugated profile 2 is fused with the plastic sheet at the weld point and then wound together to form a corrugated pipe. This effectively combines the corrugated pipe with its weakest point through hot winding, greatly improving the strength and axial pull-out force of the corrugated pipe.

[0043] As a preferred embodiment, the pipe is connected by a one-time injection-molded socket and spigot structure to facilitate the connection between pipes.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the protection scope of the present invention.

Claims

1. A plastic S-shaped support rib wound reinforced corrugated pipe, comprising a pipe body and a plastic corrugated profile, wherein the plastic corrugated profile is spirally wound around the outside of the pipe body to form an outer corrugated shape, characterized in that: The corrugated plastic profile includes a hollow body and plastic S-shaped support ribs. The plastic S-shaped support ribs are located in the body and divide the cavity inside the body into two. The plastic S-shaped support ribs have continuous bending surfaces, and the upper and lower bending surfaces of the plastic S-shaped support ribs are connected to the upper and lower ends of the body.

2. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 1, characterized in that: The width of the upper and lower bending surfaces of the plastic S-shaped support rib matches the upper and lower end faces of the body.

3. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 1, characterized in that: The upper end of the main body is provided with an upper positioning groove, and the lower end of the plastic corrugated profile is provided with a lower positioning groove. The width of the upper positioning groove and the lower positioning groove are matched with the width of the plastic S-shaped support rib.

4. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 3, characterized in that: The main body and the plastic S-shaped support rib are co-extruded composite molded together, and the upper positioning groove and the lower positioning groove are fused together with the plastic S-shaped support rib.

5. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 1, characterized in that: The plastic S-shaped support rib has through holes parallel to the rib body.

6. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 1, characterized in that: The plastic S-shaped support rib has side holes in its plate surface.

7. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 1, characterized in that: The tube body is a tubular body formed by hot winding and welding of plastic sheets. The bottom of the plastic corrugated profile is fused with the plastic sheet at the welding point and then wound together to form a corrugated pipe.

8. The plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 5, characterized in that: The bottom center of the corrugated plastic profile is thermally fused with the weld seam of the plastic sheet.

9. A plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 5, characterized in that: The connection method of the pipe body is a one-time injection molding of the socket and spigot structure.

10. A plastic S-shaped support rib wound reinforced corrugated pipe as described in claim 7, characterized in that: The plastic sheet has an overlapping, staggered structure on both sides.

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