Large-diameter plastic composite pipe
By using PE, PP, or PVC sheet and strip composite pipes with concrete, the problem of existing drainage and sewage pipes being unable to simultaneously achieve corrosion resistance, long service life, large pipe diameter, high ring stiffness, easy connection, and low cost is solved, achieving the effects of excellent corrosion resistance, smooth inner wall, long service life, large pipe diameter, and high stiffness.
Patent Information
- Application Number
- CN202521927518.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2035-09-08
Smart Images
Figure CN224549297U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline technology, and in particular to a large-diameter plastic-hybrid composite pipeline. Background Technology
[0002] Drainage and sewage pipelines are an important component of urban underground infrastructure, and their performance directly affects urban operational efficiency and ecological environmental safety. However, in practical engineering applications, designing and manufacturing a pipeline system that can simultaneously meet multiple ideal performance requirements presents significant technical challenges and practical contradictions at both the structural and material levels.
[0003] Existing drainage and sewage pipe structures cannot simultaneously achieve the characteristics of corrosion resistance, long service life, large pipe diameter, high ring stiffness, easy connection, and low cost. Utility Model Content
[0004] The purpose of this utility model is to provide a large-diameter plastic-concrete composite pipe to address the problem that existing drainage and sewage pipe structures cannot simultaneously achieve corrosion resistance, long service life, large pipe diameter, high ring stiffness, and low cost.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A large-diameter plastic-concrete composite pipe includes a strip and concrete; the strip is made of PE, PP or PVC material, and includes a horizontal connecting plate and at least one vertical partition plate. The vertical partition plate is connected to the horizontal connecting plate, and the horizontal connecting plate can be wound to form the inner wall of the pipe. The vertical partition plate is wound with the horizontal connecting plate to form a spiral groove; the concrete is filled in the spiral groove, and fiber mesh or wire mesh is embedded in the concrete.
[0006] This invention discloses a large-diameter plastic-concrete composite pipe. The inner wall of the pipe is made of plastic materials such as PE, PP, or PVC, which have excellent corrosion resistance. No other anti-corrosion measures are needed for the inner wall, and the smooth inner wall reduces frictional resistance, minimizing debris accumulation. The outer wall is mainly made of concrete, which also exhibits good corrosion resistance when buried underground. Therefore, this composite pipe has a long service life, exceeding 50 years. A pipe blank is formed by winding the strips, and the pipe blank also serves as a concrete casting mold. The pipe diameter is determined by the size of the wound strips, achieving a diameter of DN200. With a large pipe diameter of ~DN5000mm, it can meet almost all drainage project needs; the performance of the concrete is improved by fiber mesh or steel wire mesh, and the plastic-concrete composite overcomes the disadvantage of low ring stiffness of traditional plastic pipes. That is, the spiral concrete can provide high ring stiffness to the pipe, reaching SN16 or above; at the same time, the protection of the concrete overcomes the disadvantage of easy cracking at the weld of the spirally wound transverse connecting plate; since the price of concrete is significantly lower than that of plastic, the cost of this composite pipe is low; the composite pipe has a simple structure, is easy to use, and has good performance.
[0007] As a preferred technical solution of this utility model, the two ends of the transverse connecting plate are respectively provided with a first overlapping part and a second overlapping part, and the first overlapping part and the second overlapping part of the adjacent transverse connecting plates can be welded.
[0008] This structural design ensures that the thickness of the transverse connecting plates remains consistent when they are wound into a spiral tube through overlapping. It also facilitates the hot-melt welding of adjacent first and second overlapping portions into a single unit, reducing the risk of cracking at the weld joint.
[0009] As a preferred technical solution of this utility model, the vertical partition plate has a head end at one end away from the horizontal connecting plate, and the width of the head end is greater than the width of the vertical partition plate body.
[0010] By adopting this structural design, the area of the end of the vertical partition plate is increased by setting the head end, which is wider than the width of the vertical partition plate body. This makes it easier to heat-melt connect with external plastic structures such as tie rods. At the same time, the head end is embedded in the concrete relative to the body of the vertical partition plate, which increases the restraint between the plate strip and the concrete and reduces the risk of them separating.
[0011] As a preferred technical solution of this utility model, the strip is formed in one step by an extruder.
[0012] As a preferred technical solution of this utility model, the strip is wound into a tube blank by a winding machine.
[0013] As a preferred embodiment of this invention, the concrete includes reinforcing fibers.
[0014] The reinforcing fibers include steel fibers, polypropylene fibers, polyethylene fibers, glass fibers, carbon fibers, basalt fibers, or natural fibers (such as hemp, coconut shell, and bamboo fibers).
[0015] As a preferred technical solution of this utility model, a tie rod is provided along the length of the pipe. The tie rod is made of PE, PP or PVC material, and several tie rods are arranged at intervals along the circumference of the pipe. The tie rod is connected to the end of the vertical partition plate away from the horizontal connecting plate.
[0016] With this structural design, all the vertical partition plates are connected as a whole by the tie rods, and the horizontal connecting plates are fixed by the friction between the vertical partition plates and the concrete, thus preventing the horizontal connecting plates, which serve as the inner wall of the pipe, from collapsing.
[0017] As a preferred technical solution of this utility model, the end of the tube blank formed by the plate and strip is cut flat, and a plurality of embedded plates are provided in the spiral groove at the end of the tube blank. An end plate is provided at the end of the tube blank, and the end plate is circular. The end plate and the embedded plate are connected by bolts.
[0018] With this structural design, by setting the end plates with flat heads and mouths, adjacent pipes can be heat-fused and welded together during construction, which can effectively prevent leakage.
[0019] As a further preferred technical solution of this utility model, both the end plate and the bolt are made of PE, PP or PVC material, the end plate is provided with countersunk holes, the bolt is placed in the countersunk holes, and the countersunk holes are sealed with PE, PP or PVC material.
[0020] As a further preferred technical solution of this utility model, the concrete outer wall at the end of the tube blank is provided with a cover plate. The cover plate is made of PE, PP or PVC material. The cover plate is connected to the end of the vertical partition plate away from the horizontal connecting plate. The end plate is welded to the inner wall of the horizontal connecting plate and the outer wall of the cover plate to form a weld bead.
[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This utility model discloses a large-diameter plastic-concrete composite pipe. The inner wall of the pipe is made of plastic materials such as PE, PP, or PVC, which have excellent corrosion resistance. No other anti-corrosion measures are needed for the inner wall, and the smooth inner wall reduces frictional resistance, minimizing debris accumulation. The outer wall is mainly made of concrete, which also exhibits good corrosion resistance when buried underground. Therefore, this composite pipe has a long service life, exceeding 50 years. A pipe blank is formed by winding the strips, and the pipe blank also serves as a concrete casting mold. The pipe diameter is determined by the size of the wound strips, achieving diameters up to DN200. With a large pipe diameter of DN5000mm, it can meet almost all drainage project needs. The performance of the concrete is improved by using fiber mesh or steel wire mesh. Through plastic-concrete composite, the low ring stiffness of traditional plastic pipes is overcome. The spiral concrete can provide the pipe with high ring stiffness, reaching SN16 or higher. At the same time, the concrete protects against the tendency of the welded joints of the spirally wound transverse connecting plates to crack easily. Since the price of concrete is significantly lower than that of plastic, the cost of this composite pipe is low. The composite pipe has a simple structure, is easy to use, and has good performance. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of a plate and strip structure; Figure 2 This is a schematic diagram of the strip connection; Figure 3 This is a schematic diagram of another type of plate and strip structure; Figure 4 This is a cross-sectional structural diagram of a large-diameter plastic-plastic composite pipe. Figure 5 for Figure 4 Sectional view of AA; Figure 6 This is a schematic cross-sectional view of the end of a large-diameter plastic-plastic composite pipe.
[0023] Marked in the image: 1-Strip, 11-Transverse connecting plate, 111-First overlap, 112-Second overlap, 12-Vertical partition plate, 121-Head end; 2-Concrete; 3-Stretching; 4-End plate, 41-Counterhead hole; 5-Cover plate; 6-Embedded plate; 7- Bolts; 8-Weld bead. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0025] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0026] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0027] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0028] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0029] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0030] In related technologies, existing drainage and sewage pipe structures struggle to simultaneously achieve the characteristics of corrosion resistance, long service life, large pipe diameter, high ring stiffness, easy connection, and low cost. Therefore, the technical solution of this application was developed, which is described below in conjunction with... Figures 1 to 6 To elaborate.
[0031] Example 1 like Figures 1 to 6 As shown, the large-diameter plastic-concrete composite pipe of this utility model includes a strip plate 1, concrete 2, and reinforcing bars 3.
[0032] The strip 1 and the tie rod 3 are made of the same plastic material, such as PE, PP or PVC. Figure 1 As shown, the strip 1 includes a horizontal connecting plate 11 and a vertical partition plate 12. The bottom of the vertical partition plate 12 is connected to the top middle position of the horizontal connecting plate 11 to form an inverted T-shaped component. In some optional embodiments, the horizontal connecting plate 11 and the vertical partition plate 12 can be produced separately and then connected to form the strip 1, or the strip 1 can be extruded in one step by an extruder.
[0033] like Figure 2 and Figure 4 As shown, the strip 1 is wound into a tube blank by a winding machine, wherein the transverse connecting plate 11 can be wound to form the inner wall of the pipe, and the vertical partition plate 12 is wound with the transverse connecting plate 11 to form a spiral groove.
[0034] like Figure 3 As shown, two vertical partition plates 12 are connected to one of the horizontal connecting plates 11, which can form a double helical groove. Therefore, under the premise of satisfying the winding of the winding machine, a number of vertical partition plates 12 can be set on one of the horizontal connecting plates 11, which can improve the winding efficiency of large-diameter pipes.
[0035] In some alternative implementations, such as Figures 1 to 4As shown, the two ends of the transverse connecting plate 11 are respectively provided with a first overlapping portion 111 and a second overlapping portion 112. The first overlapping portion 111 and the second overlapping portion 112 of adjacent transverse connecting plates 11 can be welded. With this structure, the thickness of the transverse connecting plate 11 remains consistent when it is wound into a spiral tube by overlapping. It is also easy to heat-melt weld adjacent first overlapping portion 111 and second overlapping portion 112 into a whole, reducing the risk of cracking at the weld.
[0036] like Figure 4 and Figure 5 As shown, the concrete 2 is filled in the spiral groove, and a fiber mesh or steel wire mesh is embedded in the concrete 2. The tie rod 3 is installed along the entire length of the pipe, and several tie rods 3 are spaced apart along the circumference of the pipe. The tie rod 3 is connected to the end of the vertical partition plate 12 away from the horizontal connecting plate 11. With this structure, all the vertical partition plates 12 are connected as a whole by the tie rods 3, and the horizontal connecting plate 11 is fixed by the friction between the vertical partition plates 12 and the concrete 2, preventing the horizontal connecting plate 11, which serves as the inner wall of the pipe, from collapsing. In this embodiment, Figure 5 An example is provided showing the case where four tie rods 3 are set at equal intervals.
[0037] In some alternative embodiments, the surface of the concrete 2 is provided with a fiber mesh.
[0038] In an optional embodiment, the concrete 2 includes reinforcing fibers, including steel fibers, polypropylene fibers, polyethylene fibers, glass fibers, carbon fibers, basalt fibers, or natural fibers (such as hemp, coconut shell, bamboo fiber).
[0039] In some alternative implementations, such as Figures 1 to 4 As shown, the vertical partition plate 12 has a head end 121 at one end away from the horizontal connecting plate 11. The width of the head end 121 is greater than the width of the vertical partition plate 12. With this structural arrangement, by setting the head end 121 with a width greater than the width of the vertical partition plate 12, the area of the end of the vertical partition plate 12 is increased, which facilitates the heat fusion connection with the tie rod 3 and other external plastic structures. At the same time, the head end 121 is embedded in the concrete 2 relative to the body of the vertical partition plate 12, which increases the mutual restraint between the plate strip 1 and the concrete 2 and reduces the risk of them separating.
[0040] like Figure 6As shown, the end of the tube blank formed by the strip 1 is cut flat, and a plurality of embedded plates 6 are provided in the spiral groove at the end of the tube blank. An end plate 4 is provided at the end of the tube blank, and a cover plate 5 is provided on the outer wall of the concrete 2 at the end of the tube blank. The end plate 4 and the embedded plate 6 are connected by bolts 7. The embedded plate 6 can be made of fiberglass plate. The thickness of the end plate 4 is 8mm~12mm, the thickness of the cover plate 5 is 4mm~6mm, and the width of the cover plate 5 is 120mm~150mm. The two ends of the cover plate 5 in the length direction are hot-melt welded to the end side of the tie rod 3.
[0041] The end plate 4, the cover plate 5, the bolt 7, and the strip 1 are all made of the same plastic material, such as PE, PP, or PVC. The end plate 4 is annular and has a countersunk hole 41. The bolt 7 is placed in the countersunk hole 41, which is sealed by the same plastic material as the end plate 4. The cover plate 5 is connected to the end of the vertical partition plate 12 away from the horizontal connecting plate 11. The end plate 4 is welded to the inner wall of the horizontal connecting plate 11 and the outer wall of the cover plate 5 to form a weld 8. With this structure, the weld 8 can enhance the stability of the plastic tube blank connected to the end plate 4, and the embedded plate 6 can effectively connect the end plate 4 to the concrete 2.
[0042] This embodiment describes a large-diameter plastic-concrete composite pipe. The inner wall of the pipe is made of plastic materials such as PE, PP, or PVC, which have excellent corrosion resistance. No other anti-corrosion measures are needed for the inner wall, and the smooth inner wall reduces frictional resistance, minimizing debris accumulation. The outer wall is mainly made of concrete 2, which also has good corrosion resistance when buried underground. Therefore, this composite pipe has a long service life, exceeding 50 years. A pipe blank is formed by winding the strip 1, and the pipe blank also serves as a casting mold for the concrete 2. The pipe diameter is determined by the size of the winding strip 1, allowing for large diameters from DN200 to DN5000 mm, meeting almost all drainage project needs. Fiber mesh or wire mesh improves the performance of the concrete 2. Through plastic-concrete composite, it overcomes the disadvantage of low ring stiffness of traditional plastic pipes. That is, the spiral-shaped concrete 2 can provide high ring stiffness to the pipe, reaching SN16 or above. At the same time, the protection of the concrete 2 overcomes the disadvantage of easy cracking at the weld of the spirally wound transverse connecting plate 11. Since the price of the concrete 2 is significantly lower than that of plastic, the cost of this composite pipe is low. By setting the end plates 4 with flat ends, adjacent pipes can be heat-fused and welded together during construction, which can effectively prevent leakage and facilitate connection. This composite pipe has a simple structure, is easy to use, and has good performance.
[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A large-diameter plastic-plastic composite pipe, characterized in that, include: The strip (1) is made of PE, PP or PVC material. The strip (1) includes a horizontal connecting plate (11) and at least one vertical partition plate (12). The vertical partition plate (12) is connected to the horizontal connecting plate (11). The horizontal connecting plate (11) can be wound to form the inner wall of the pipe. The vertical partition plate (12) is wound with the horizontal connecting plate (11) to form a spiral groove. Concrete (2) is filled in the spiral groove, and fiber mesh or wire mesh is embedded in the concrete (2).
2. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, The two ends of the transverse connecting plate (11) are respectively provided with a first overlapping part (111) and a second overlapping part (112), and the first overlapping part (111) and the second overlapping part (112) of the adjacent transverse connecting plates (11) can be welded.
3. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, The vertical partition plate (12) has a head end (121) at one end away from the horizontal connecting plate (11), and the width of the head end (121) is greater than the width of the vertical partition plate (12).
4. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, The strip (1) is formed in one step by an extruder.
5. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, The strip (1) is wound into a tube blank by a winding machine.
6. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, The concrete (2) includes reinforcing fibers.
7. The large-diameter plastic-plastic composite pipe according to claim 1, characterized in that, A tie rod (3) is provided along the length of the pipe. The tie rod (3) is made of PE, PP or PVC material. Several tie rods (3) are arranged at intervals along the circumference of the pipe. The tie rod (3) is connected to the end of the vertical partition plate (12) away from the horizontal connecting plate (11).
8. The large-diameter plastic-plastic composite pipe according to any one of claims 1-7, characterized in that, The tube blank formed by the plate strip (1) is cut flat at the end, and a number of embedded plates (6) are provided in the spiral groove at the end of the tube blank. An end plate (4) is provided at the end of the tube blank. The end plate (4) is circular. The end plate (4) and the embedded plate (6) are connected by bolts (7).
9. The large-diameter plastic-plastic composite pipe according to claim 8, characterized in that, The end plate (4) and the bolt (7) are both made of PE, PP or PVC. The end plate (4) is provided with a countersunk hole (41), and the bolt (7) is located in the countersunk hole (41). The countersunk hole (41) is sealed with PE, PP or PVC material.
10. The large-diameter plastic-plastic composite pipe according to claim 9, characterized in that, The outer wall of the concrete (2) at the end of the tube blank is provided with a cover plate (5). The cover plate (5) is made of PE, PP or PVC material. The cover plate (5) is connected to the end of the vertical partition plate (12) away from the horizontal connecting plate (11). The end plate (4) is welded to the inner wall of the horizontal connecting plate (11) and the outer wall of the cover plate (5) to form a weld (8).