Surface-modified solid waste reinforced mpve bellows

Abstract

This utility model relates to the field of corrugated pipe technology, and more particularly to a surface-modified solid waste reinforced MPVE corrugated pipe. The technical solution includes a corrugated pipe, a rubber ring, and clamping blocks. The corrugated pipe has equidistantly distributed corrugated sections at its middle end. A rubber ring is disposed inside the corrugated pipe, and the inner wall of the rubber ring has an annularly arrayed assembly groove. A spring is disposed on the inner wall of each assembly groove, and clamping blocks are disposed on the inner wall of each spring. The corrugated sections, viewed from the inside out, form an annular groove that is concave inwards. The rubber ring is located inside the inner groove. A positioning rod is disposed on the outer wall of the clamping blocks, and a positioning cylinder connected to the assembly groove is sleeved on the outer wall of the positioning rod. The positioning cylinder and the positioning rod are located inside the spring. This utility model provides positioning assistance for installation and fixation by installing a suitable rubber ring inside the mating end of the corrugated pipe, using the rubber ring's own elasticity for self-positioning, and cooperating with the clamping blocks elastically supported by the inner wall of the rubber ring to clamp the outer wall of the mating end.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, and in particular to a surface-modified solid waste reinforced MPVE corrugated pipe. Background Technology

[0002] Corrugated pipes are tubular products with a periodic corrugated structure on their walls. Through a special molding process, the pipe wall is formed with alternating concave and convex corrugations, which gives the pipe flexibility, pressure resistance, and deformation resistance. Unlike traditional straight pipes with smooth walls, they are used for municipal drainage, building rainwater pipes, farmland irrigation, etc. They can adapt to deformation caused by foundation settlement or temperature changes. As protective sleeves, they are used to lay cables and optical cables to prevent external compression or corrosion. Common corrugation shapes are U-shaped, V-shaped, or Ω-shaped.

[0003] MPVE is a composite material preparation technology. Its core is to improve the performance of MPVE materials through specific processes. Solid waste is added to MPVE as a reinforcing filler, and the rigidity or fibrous structure of solid waste is used to improve the mechanical properties of the material, such as strength, stiffness, and impact resistance. At the same time, it realizes the resource utilization of solid waste. MPVE has both rigidity and toughness. The corrugated pipe itself is a hollow corrugated structure, which is prone to slight deformation of radial bending and axial expansion and contraction when subjected to force. If the interface lacks a rigid positioning structure, it is difficult to maintain a stable alignment. Corrugated pipes are connected by flanges, hot melt, plug-in and adhesive methods. During the connection, the inconvenience of positioning will affect the installation. To solve this problem, we propose a surface-modified solid waste reinforced MPVE corrugated pipe. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a surface-modified solid waste reinforced MPVE corrugated pipe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surface-modified solid waste reinforced MPVE corrugated pipe, comprising a corrugated pipe, a rubber ring, and clamping blocks. The corrugated pipe has equidistantly distributed corrugated sections at its middle end. A rubber ring is disposed inside the corrugated pipe. The inner wall of the rubber ring has assembly grooves arranged in a ring array. A spring is disposed on the inner wall of the assembly groove. Clamping blocks are disposed on the inner wall of each spring.

[0006] Preferably, the corrugated section, viewed from the inside out, forms an annular groove that is concave inward, and the rubber ring is located inside the groove. The groove is a structure inherent to the corrugated end of the corrugated pipe, requiring no changes to the existing corrugated pipe structure, and can be directly utilized for modular rubber ring positioning structures.

[0007] Preferably, the outer wall of the clamping block is provided with a positioning rod, and a positioning cylinder connected to the assembly groove is sleeved on the outer wall of the positioning rod. Both the positioning cylinder and the positioning rod are located inside the spring. The positioning rod and the positioning cylinder are slidably installed to position the telescopic spring, preventing excessive displacement of the spring. Together with the restriction of the clamping block by the assembly groove, this helps the clamping block to effectively perform its clamping function.

[0008] Preferably, symmetrically distributed ball bearings are rotatably mounted inside the clamping block, and an operating section located on the rubber ring is provided between the assembly grooves. The ball bearings reduce the resistance of the clamping block as it passes through the outer wall of the corrugated pipe mating end, and the operating section can be bent to facilitate the bending and assembly of the rubber ring into the inner groove.

[0009] Preferably, one end of the corrugated pipe is provided with a mating interface, and the other end of the corrugated pipe is provided with a mating tube facing away from the mating interface. The outer wall of the mating tube is provided with a mesh pattern. The mating tube is inserted into the mating interface, and the mesh pattern increases the friction of the mating surfaces.

[0010] Preferably, the corrugated pipe includes an inner protective layer on the inside, a self-healing functional layer on the outside of the inner protective layer, and a reinforced load-bearing layer on the outside of the self-healing functional layer.

[0011] Preferably, the outer layer of the reinforced load-bearing layer is provided with a surface-modified solid waste MPVE base layer, and the outer layer of the surface-modified solid waste MPVE base layer is provided with an outer weather-resistant layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model features corrugated sections between the corrugated pipes. Each corrugated section has an inner groove that protrudes outward from the outside and recesses inward from the inside. The inner groove is annular, and a suitable rubber ring is installed inside the annular inner groove. The inner wall of the rubber ring is provided with elastic support clamps arranged in a circular array. When the corrugated pipes are fixed by insertion, bonding, or heat fusion, the elastic clamps are fitted onto the outer wall of the corrugated pipe joint. Under the clamping force of the elastic support clamps, the corrugated pipes are positioned, which helps with the installation of the corrugated pipes, reduces manual adjustment time, and ensures accurate positioning so that the joint is subjected to uniform force, avoids stress concentration, and improves project quality and efficiency. Attached Figure Description

[0013] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a side sectional three-dimensional structural diagram of the corrugated section of this utility model; Figure 3 This is a side view of the three-dimensional structure of the rubber ring of this utility model; Figure 4 This is a side view of the three-dimensional structure of the clamping block of this utility model; Figure 5This is a schematic diagram of the three-dimensional structure of the corrugated section of this utility model.

[0014] Reference numerals: 1. Corrugated pipe; 2. Connecting joint; 3. Connecting pipe; 4. Mesh pattern; 5. Corrugated section; 6. Rubber ring; 7. Inner groove; 8. Clamping block; 9. Ball bearing; 10. Positioning rod; 11. Positioning cylinder; 12. Spring; 13. Operating section; 14. Assembly groove; 15. Inner protective layer; 16. Self-healing functional layer; 17. Reinforced load-bearing layer; 18. Surface-modified solid waste MPVE base layer; 19. Outer weather-resistant layer. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1-5 As shown, the present invention proposes a surface-modified solid waste reinforced MPVE corrugated pipe, including a corrugated pipe 1, a rubber ring 6 and clamping blocks 8. The corrugated pipe 1 has equidistantly distributed corrugated sections 5 at the middle end. The corrugated pipe 1 has a rubber ring 6 inside. The inner wall of the rubber ring 6 has an assembly groove 14 distributed in a ring array. The inner wall of the assembly groove 14 is provided with a spring 12. The inner wall of the spring 12 is provided with clamping blocks 8. When viewed from the inside out, the corrugated section 5 forms an inner groove 7 that is concave inward and ring-shaped, and the rubber ring 6 is located inside the inner groove 7. A positioning rod 10 is provided on the outer wall of the clamping block 8. A positioning cylinder 11 connected to the assembly groove 14 is sleeved on the outer wall of the positioning rod 10. Both the positioning cylinder 11 and the positioning rod 10 are located inside the spring 12. The clamping block 8 is rotatably mounted with symmetrically distributed balls 9, and the assembly groove 14 is provided with an operating section 13 located on the rubber ring 6; One end of the corrugated pipe 1 is provided with a connecting port 2, and the other end of the corrugated pipe 1 is provided with a connecting pipe 3 facing away from the connecting port 2. The outer wall of the connecting pipe 3 is provided with a grid pattern 4. Based on the implementation steps of Example 1: The rubber ring 6 is made of EPDM rubber, which has excellent aging resistance. It is bent by the operating section 13 and fed into the inner groove 7 of the mating end, forming a modular positioning structure within the inner groove 7. This facilitates the insertion of the mating tube 3 and the mating interface 2. The spring 12 is made of 65Mn high-strength spring steel, with a large elastic deformation range, adapting to the tolerances of the mating tube 3 with small strokes. The clamping block 8 is made of wear-resistant nylon and, together with the rotating steel ball bearings 9, ensures the centered positioning of the mating tube 3 through elastic clamping force. It can reduce the insertion resistance and improve the installation efficiency. The positioning rod 10 and the positioning cylinder 11 are both made of ABS engineering plastic, which can limit the excessive lateral displacement of the spring 12. The rubber ring 6 is slightly tilted by its own material, but the clamping block 8 is restricted by the assembly groove 14, which ensures that the clamping block 8 effectively clamps the connector 3. The outer wall mesh pattern 4 of the connector 3 is integrally molded with polyethylene material, which forms a mechanical interlock with the MPVE material of the inner wall of the connector 2. Combined with the elastic compression of the rubber ring 6, the pull-out force is improved, which meets the anti-displacement requirements of the buried environment. When connecting the bellows 1, align the connecting pipe 3 at one end with the connecting port 2 at the other end. During the insertion process, the outer wall of the connecting pipe 3 presses against the ball bearing 9 of the clamping block 8, forcing the clamping block 8 to retract into the assembly groove 14. At this time, the spring 12 is compressed, and the positioning rod 10 slides along the positioning cylinder 11 to ensure the axial deformation of the spring 12. The reaction force of the spring 12 pushes the clamping block 8 to fit tightly against the outer wall of the connecting pipe 3, so that the connecting pipe 3 and the connecting port 2 remain coaxial, solving the positioning offset problem. After the connecting pipe 3 is fully inserted, the mesh pattern 4 engages with the inner wall of the connecting port 2, and at the same time, the rubber ring 6 is squeezed into the inner groove 7. During the pipe installation process, it provides effective positioning assistance and helps the installation of the bellows 1. During hot-melt connection, the MPVE material at the interface is heated to a molten state. It is soft and lacks rigid support, making it prone to axial misalignment or radial tilting during pressure application or cooling. Once it has shifted after melting, it cannot be easily adjusted like a mechanical connection. After cooling, it will form permanent defects such as uneven interface thickness and local incomplete fusion, reducing connection strength and sealing performance. Precise positioning can ensure a sealed structure and uniform force distribution. During insertion, the rubber ring 6 is evenly squeezed without shifting or wrinkling. The molten layer thickness is consistent during hot-melt, avoiding local incomplete fusion. The axially concentric connection allows the corrugated pipe 1 to transmit force evenly along the pipe body when subjected to soil pressure and cable tension, reducing the risk of breakage at the interface and reducing the manpower and material costs of rework and maintenance. It is especially suitable for long-term cable protection projects.

[0017] like Figures 1-5As shown, compared with Embodiment 1, the surface-modified solid waste reinforced MPVE corrugated pipe 1 proposed in this utility model further includes: the corrugated pipe 1 includes an inner protective layer 15, a self-healing functional layer 16 located outside the inner protective layer 15, and a reinforced load-bearing layer 17 located outside the self-healing functional layer 16. A surface-modified solid waste MPVE base layer 18 is provided outside the reinforced load-bearing layer 17, and an outer weather-resistant layer 19 is provided outside the surface-modified solid waste MPVE base layer 18.

[0018] In this embodiment, the inner protective layer 15 is 0.5-1mm thick and uses modified MPVE with added antioxidants and lubricants. It directly contacts the cable, providing a smooth inner wall to reduce frictional damage during cable installation. It also has acid and alkali resistance and corrosion resistance to prevent the cable sheath from being corroded by trace media that may be present in the pipeline. The self-healing functional layer 16 is 1-2mm thick and contains water- and air-expanding microcapsules mixed into the MPVE matrix. The expandable microcapsules are water-soluble polyurethane prepolymer, curing agent and catalyst. The capsule wall is a polyoxymethylene film. When the pipeline breaks, the microcapsules break along with the pipe wall, releasing the internal repair agent. They react quickly and expand upon contact with water or air, automatically filling the gaps. The reinforced load-bearing layer 17 is 2-3mm thick and is a composite layer of glass fiber reinforced construction waste recycled particles and MPVE. Through the surface modification of solid waste and the good compatibility with MPVE after treatment with silane coupling agent, the overall rigidity and impact resistance of the pipeline are improved, allowing it to withstand soil pressure, loads and other external forces in the buried environment. The surface-modified solid waste MPVE base layer 18 is 1.5-2.5mm thick and consists of low-content surface-modified solid waste, such as fly ash microspheres, blended with MPVE. Its function is to serve as a transition layer between the reinforced load-bearing layer 17 and the outer weather-resistant layer 19. The solid waste reduces material costs by filling the gaps, and at the same time, it alleviates stress caused by the difference in deformation between the outer and reinforced layers by adjusting the flexibility of MPVE. The outer weather-resistant layer 19 is 0.8-1.2mm thick and is made of MPVE with added carbon black, ultraviolet absorbers, and anti-aging agents. It can resist the influence of external environment, such as material aging caused by ultraviolet radiation, microbial corrosion in the soil, and thermal expansion and contraction caused by extreme temperatures, thus extending the service life of the pipeline. The microcapsules in the self-healing functional layer 16 have a diameter of 50-100μm and are uniformly dispersed in the MPVE matrix. When the pipe breaks or cracks due to external force, the capsule wall breaks along with the pipe wall, releasing the water-soluble polyurethane prepolymer and latent curing agent inside. If the rupture comes into contact with water, the prepolymer reacts with water to form urea bonds. At the same time, the isocyanate derivative curing agent crosslinks rapidly under the triggering of water, air, or oxygen to form an elastic gel that fills the gap. If it only comes into contact with air, the prepolymer cures under the action of organotin compound catalyst to seal the gap. During the reaction process, the repair agent expands in volume, ensuring a tight fit with the pipe wall and forming a watertight and airtight sealing layer. The gel has a certain degree of elasticity, which can adapt to the slight deformation of the pipeline caused by temperature changes, preventing secondary cracking. The core requirement of cable protection is to isolate water, mud, and corrosive media. The self-healing function can quickly block external intrusion after the pipeline breaks, preventing cable short circuits and insulation aging, and reducing the risk of power or communication failures. Traditional corrugated pipes require excavation and repair after a break, especially in complex environments such as buried pipes and tunnels, which is costly and time-consuming. The automatic filling function can achieve passive repair, reduce the need for emergency repairs, and extend the pipeline maintenance cycle. For micro-cracks in pipelines caused by unforeseen external forces such as earthquakes and foundation settlement, the self-healing function can automatically seal the potential problem in its early stages, preventing small damage from developing into large fractures and improving the long-term stability of the project.

[0019] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A surface-modified solid waste reinforced MPVE bellows comprising a bellows (1), a rubber ring (6) and a clamp block (8), characterized in that: The corrugated pipe (1) has equidistantly distributed corrugated sections (5) at the middle end. A rubber ring (6) is provided inside the corrugated pipe (1). The inner wall of the rubber ring (6) has an assembly groove (14) arranged in a ring array. A spring (12) is provided on the inner wall of the assembly groove (14). A clamp (8) is provided on the inner wall of each spring (12).

2. A surface-modified solid-waste reinforced MPVE bellows (1) according to claim 1, characterized in that: The corrugated section (5) forms an inner groove (7) that is concave inward when viewed from the inside out, and the rubber ring (6) is located inside the inner groove (7).

3. A surface-modified solid waste reinforced MPVE bellows (1) according to claim 1, characterized in that: The clamping block (8) is provided with a positioning rod (10) on its outer wall. The positioning rod (10) is sleeved with a positioning cylinder (11) connected to the assembly groove (14). Both the positioning cylinder (11) and the positioning rod (10) are located inside the spring (12).

4. A surface-modified solid waste reinforced MPVE bellows (1) as claimed in claim 1, wherein: The clamping block (8) is rotatably mounted with symmetrically distributed balls (9), and the assembly grooves (14) are provided with an operating section (13) located on the rubber ring (6).

5. A surface-modified solid waste reinforced MPVE bellows (1) as claimed in claim 1, wherein: The corrugated pipe (1) has a connecting port (2) at one end and a connecting pipe (3) facing away from the connecting port (2) at the other end. The outer wall of the connecting pipe (3) is provided with a grid pattern (4).

6. A surface-modified solid waste reinforced MPVE bellows (1) according to claim 1, characterized in that: The corrugated pipe (1) includes an inner protective layer (15) on the inside, a self-healing functional layer (16) on the outside of the inner protective layer (15), and a reinforced load-bearing layer (17) on the outside of the self-healing functional layer (16).

7. A surface-modified solid-waste reinforced MPVE bellows (1) according to claim 6, characterized in that: The outer layer of the reinforced load-bearing layer (17) is provided with a surface-modified solid waste MPVE base layer (18), and the outer layer of the surface-modified solid waste MPVE base layer (18) is provided with an outer weather-resistant layer (19).

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