Double-wall corrugated pipe with enhanced compression resistance

Abstract

The utility model relates to the technical field of corrugated pipes, in particular to a double-wall corrugated pipe with enhanced compression resistance, which comprises an inner pipe and an outer pipe, a plurality of support rods are arranged between the inner pipe and the outer pipe, the support rods are uniformly distributed along the axial direction of the corrugated pipe to form a continuous support network, and the integral rigidity of the corrugated pipe is enhanced. The supporting rod comprises a connecting part and a wave-shaped reinforcing rib, and the reinforcing rib is made of a glass fiber reinforced composite material. The outer surface of the outer pipe is coated with three anti-ultraviolet protection layers, and the inner wall and the outer wall are provided with high-elasticity rubber buffer pads, so that impact force is effectively absorbed. Flanges and bolt holes are arranged at the two ends of the corrugated pipe, and sealing performance and stability of the connecting position are guaranteed. The compressive strength, rigidity and weather resistance of the corrugated pipe are improved.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline manufacturing technology, specifically a double-wall corrugated pipe with enhanced pressure resistance. Background Technology

[0002] Double-wall corrugated pipes are widely used in drainage, sewage, and cable protection due to their advantages such as lightweight, corrosion resistance, and low cost. However, traditional double-wall corrugated pipes have significant shortcomings in pressure resistance, especially under heavy external loads, making them prone to deformation and breakage, affecting their performance and lifespan. Furthermore, existing double-wall corrugated pipes have limitations in material selection and structural design, making it difficult to meet the requirements of high pressure resistance and long service life applications. Therefore, developing a double-wall corrugated pipe with enhanced pressure resistance is not only crucial for improving its stability and reliability under complex working conditions but also for expanding its application range, possessing significant practical importance and application value. Utility Model Content

[0003] The purpose of this invention is to provide a double-walled corrugated pipe with enhanced compressive strength, which solves the problem that traditional corrugated pipes are prone to deformation and breakage when subjected to large external forces, and has comprehensive technical effects.

[0004] A double-walled corrugated pipe with enhanced pressure resistance includes an inner pipe and an outer pipe, with several supporting structures between them. Each supporting structure includes multiple support rods vertically positioned between the inner and outer pipes, evenly distributed along the axial direction of the corrugated pipe. The corrugated portions of the inner and outer pipes are connected by these support rods, forming a continuous support network that enhances the overall rigidity of the corrugated pipe. Both the inner and outer pipes are made of high-strength polyethylene, and the outer surface of the outer pipe is coated with a UV-resistant protective layer. This layer effectively prevents UV damage to the corrugated pipe, extending its service life.

[0005] Each support rod includes a connecting part fixed at both ends to the inner and outer tubes respectively, and a reinforcing rib disposed between the connecting parts. The reinforcing rib is corrugated to increase the compressive strength of the support rod. The reinforcing rib is made of glass fiber reinforced composite material, which has good mechanical properties and corrosion resistance.

[0006] It also includes connecting devices at both ends of the bellows. The connecting devices include flanges at the ends of the inner and outer pipes and several bolt holes on the flanges. The flanges are connected to the flanges of adjacent bellows by bolts and nuts to ensure the sealing and stability of the bellows at the connection.

[0007] The support structure also includes multiple buffer pads installed on the inner and outer walls of the bellows. The buffer pads are made of highly elastic rubber material and can effectively absorb the impact force of the bellows when it is under pressure, reducing the deformation of the bellows.

[0008] The UV protection layer includes a base coating layer on the outer surface of the outer tube, an intermediate coating layer on the base coating layer, and a top coating layer on the intermediate coating layer. The base coating layer and the top coating layer are made of polyurethane resin, and the intermediate coating layer is made of alumina. The three-layer structure can effectively block ultraviolet rays while providing excellent mechanical properties and weather resistance.

[0009] This design presents a double-walled corrugated pipe with enhanced compressive strength. By adding support rods and reinforcing ribs, a continuous support network is formed, effectively improving the compressive strength and rigidity of the corrugated pipe. Simultaneously, the use of an UV-protective layer and a buffer pad further enhances the weather resistance and impact resistance of the corrugated pipe, resulting in a multi-functional technical effect. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the double-walled corrugated pipe with enhanced compressive strength in an embodiment of this utility model.

[0011] Figure 2 This is a partial cross-sectional view of the bellows in an embodiment of the present invention, showing the detailed structure of the support structure.

[0012] Figure 3 This is a schematic diagram of the support rod and reinforcing rib in an embodiment of the present invention.

[0013] Figure 4 This is a schematic diagram of the connection device structure at both ends of the corrugated pipe in an embodiment of this utility model.

[0014] Figure 5 This is a schematic diagram of the structure of the UV-protective layer in an embodiment of this utility model.

[0015] The attached diagram is labeled as follows: 1. Inner tube; 2. Outer tube; 3. Support rod; 4. Reinforcing rib; 5. Flange; 6. Bolt hole; 7. Buffer pad; 8. Primer coating; 9. Intermediate coating; 10. Topcoat coating. Detailed Implementation

[0016] This invention provides a double-walled corrugated pipe with enhanced compressive strength. By adding support rods and reinforcing ribs, a continuous support network is formed, effectively improving the compressive strength and rigidity of the corrugated pipe. Simultaneously, the use of an anti-UV protective layer and a buffer pad further enhances the weather resistance and impact resistance of the corrugated pipe, achieving multi-functional technical effects. The specific structure and working principle of this invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the double-walled corrugated pipe with enhanced compressive strength in an embodiment of this utility model. Figure 1As shown, the double-wall corrugated pipe of this invention includes an inner pipe 1 and an outer pipe 2, with several supporting structures between the inner pipe 1 and the outer pipe 2. Both the inner pipe 1 and the outer pipe 2 are made of high-strength polyethylene, which has good corrosion resistance and mechanical properties. The outer surface of the outer pipe 2 is coated with an anti-ultraviolet protective layer, which includes a base coating 8, an intermediate coating 9, and a top coating 10. This three-layer structure can effectively block ultraviolet rays while providing excellent mechanical properties and weather resistance. The base coating 8 and the top coating 10 are made of polyurethane resin, and the intermediate coating 9 is made of alumina.

[0018] Specifically, the corrugated sections of the inner tube 1 and the outer tube 2 are connected by support rods 3, forming a continuous support network. The support rods 3 are evenly distributed along the axial direction of the corrugated tube, ensuring the rigidity and compressive strength of the corrugated tube in all directions. Each support rod 3 includes a connecting portion fixed at both ends to the inner tube 1 and the outer tube 2, and a reinforcing rib 4 disposed between the connecting portions. The reinforcing rib 4 is corrugated to increase the compressive strength of the support rod 3. The reinforcing rib 4 is made of glass fiber reinforced composite material, which has good mechanical properties and corrosion resistance. Through this structural design, the double-wall corrugated tube of this invention can effectively disperse pressure when subjected to large external forces, reducing the risk of deformation and rupture of the corrugated tube.

[0019] Figure 2 This is a partial cross-sectional view of the bellows in an embodiment of the present invention, showing the detailed structure of the support structure. For example... Figure 2 As shown, the corrugated portions of the inner tube 1 and the outer tube 2 are connected by support rods 3. The number and distribution density of the support rods 3 can be adjusted according to the actual application scenario and required compressive strength of the corrugated pipe. In this embodiment, there are 20 support rods 3, evenly distributed along the axial direction of the corrugated pipe. The connecting parts of the support rods 3 are connected to the inner tube 1 and the outer tube 2 respectively by welding or mechanical fixing to ensure the firmness and stability of the connection. The reinforcing ribs 4 are wavy, and their crests and troughs are tightly connected to the connecting parts of the support rods 3 to form an integral support structure, which effectively improves the compressive strength and rigidity of the corrugated pipe.

[0020] Figure 3 This is a schematic diagram of the support rod and reinforcing rib in an embodiment of this utility model. Figure 3As shown, the connecting part of the support rod 3 includes two fixed ends, an inner fixed end 11 and an outer fixed end 12. The inner fixed end 11 is fixed to the corrugated part of the inner tube 1, and the outer fixed end 12 is fixed to the corrugated part of the outer tube 2. The inner fixed end 11 and the outer fixed end 12 can be connected to the inner tube 1 and the outer tube 2 by welding, bonding, or mechanical fixing. The corrugated structure of the reinforcing rib 4 includes several crests 13 and troughs 14. The spacing and height between the crests 13 and troughs 14 can be adjusted according to actual needs to achieve the best compressive strength. The reinforcing rib 4 is made of glass fiber reinforced composite material, which has high mechanical strength and good corrosion resistance, effectively preventing the support rod 3 from losing its supporting effect due to corrosion during long-term use.

[0021] Multiple buffer pads 7 are also provided on the inner and outer walls of the bellows. These buffer pads 7 are made of highly elastic rubber material and can effectively absorb the impact force when the bellows is under pressure, reducing its deformation. The number and distribution density of the buffer pads 7 can be adjusted according to the actual application scenario of the bellows. In this embodiment, there are 10 buffer pads 7, evenly distributed along the axial direction of the bellows. The buffer pads 7 are fixed to the corrugated parts of the inner tube 1 and outer tube 2 by adhesive bonding or mechanical fixing, ensuring their effective function when the bellows is under pressure. The buffer pads 7 are 5mm thick, providing sufficient deformation space under pressure to effectively absorb impact force and protect the inner tube 1 and outer tube 2 of the bellows from damage.

[0022] Figure 4 This is a schematic diagram of the connecting device structure at both ends of the corrugated pipe in an embodiment of this utility model. Figure 4 As shown, the bellows has connecting devices at both ends, including flanges 5 at the ends of the inner pipe 1 and the outer pipe 2, and several bolt holes 6 on the flanges 5. The flanges 5 are connected to the flanges 5 of adjacent bellows via bolts and nuts, ensuring the sealing and stability of the bellows at the connection. There are four flanges 5, located at both ends of the inner pipe 1 and the outer pipe 2. There are eight bolt holes 6, evenly distributed along the circumference of the flanges 5. The bolt and nut connection ensures the sealing and stability of the bellows at the connection, preventing leakage and detachment due to loose connections.

[0023] The UV protection layer includes a base coating 8, an intermediate coating 9, and a top coating 10 applied to the outer surface of the outer tube 2. The base coating 8 and the top coating 10 are made of polyurethane resin, and the intermediate coating 9 is made of aluminum oxide. Figure 5 This is a schematic diagram of the structure of the UV-protective layer in an embodiment of this utility model. Figure 5As shown, the thickness of the base coating 8 is 50 μm, the thickness of the intermediate coating 9 is 100 μm, and the thickness of the top coating 10 is 50 μm. The base coating 8 provides initial UV protection, the intermediate coating 9 further enhances the UV protection while providing excellent mechanical properties, and the top coating 10 provides final UV protection and aesthetic appeal. This three-layer UV protection effectively prevents UV damage to the bellows, extending its service life. Furthermore, the UV protection layer also exhibits good weather resistance and chemical corrosion resistance, enabling long-term use in various harsh environments without losing its protective effect.

[0024] In specific applications, the double-wall corrugated pipe of this invention can be used in underground pipelines, cable sheaths, industrial drainage, and other fields. For example, during the laying of underground pipelines, due to long-term soil compaction and frequent vehicle traffic, the pipeline needs to possess high compressive strength and weather resistance. The double-wall corrugated pipe of this invention, by adding support rods 3 and reinforcing ribs 4, forms a continuous support network, effectively improving the overall rigidity and compressive strength of the pipeline, making it less prone to deformation and breakage under significant external forces. Simultaneously, the use of an anti-UV protective layer and a buffer pad 7 further enhances the pipeline's weather resistance and impact resistance, ensuring that the pipeline maintains good performance and structural stability during long-term use.

[0025] In cable sheath applications, the double-walled corrugated pipe of this invention can effectively protect cables from the influence of the external environment. Since cable sheaths need to be used outdoors for extended periods, exposed to ultraviolet radiation and the natural environment for long periods, the use of an ultraviolet-resistant protective layer is particularly important. The three-layer structure of the ultraviolet-resistant protective layer effectively prevents ultraviolet damage to the corrugated pipe, extending its service life. Furthermore, the use of the buffer pad 7 effectively absorbs the impact force on the cable sheath when under pressure, reducing the deformation of the corrugated pipe and protecting the internal wiring of the cable from damage.

[0026] In industrial drainage applications, the double-wall corrugated pipe of this invention can effectively handle large-flow drainage problems. Since industrial drainage pipes need to withstand significant internal water pressure and external pressure, the design of the support rod 3 and reinforcing rib 4 effectively disperses the internal and external pressures, improving the pipe's pressure resistance and rigidity. Simultaneously, the high-strength polyethylene material of the inner pipe 1 and outer pipe 2 has excellent corrosion resistance, preventing damage from corrosion during long-term use. The design of the flange 5 and bolt holes 6 ensures the sealing and stability of the pipe connections, preventing leakage and detachment caused by loose connections.

[0027] In practical operation, when the double-walled corrugated pipe of this invention is subjected to external pressure, the support rod 3 and reinforcing rib 4 can effectively disperse the pressure and reduce the deformation of the corrugated pipe. The connecting part of the support rod 3 is connected to the inner tube 1 and the outer tube 2 by welding or mechanical fixing, ensuring that it can effectively transmit pressure when under pressure and prevent local deformation of the inner tube 1 and the outer tube 2 of the corrugated pipe. The corrugated structure of the reinforcing rib 4 can further increase the compressive strength of the support rod 3, ensuring that the corrugated pipe maintains structural stability when subjected to large external forces. At the same time, the buffer pad 7 can effectively absorb the impact force, reduce the deformation of the corrugated pipe, and protect the inner tube 1 and the outer tube 2 from damage.

[0028] When corrugated pipes are used for underground pipeline laying, they require high compressive strength and weather resistance due to long-term soil compaction and vehicle traffic. This invention's double-wall corrugated pipe, through the design of support rods 3 and reinforcing ribs 4, effectively improves the overall rigidity and compressive strength of the pipeline. The use of an anti-UV protective layer effectively prevents UV damage to the pipeline, extending its service life. The use of a buffer pad 7 effectively absorbs the impact force of the pipeline under pressure, reducing pipeline deformation and protecting the inner pipe 1 and outer pipe 2 from damage.

[0029] When corrugated pipes are used as cable sheaths, the cable sheaths need to be used outdoors for extended periods, exposed to ultraviolet radiation and the natural environment for long periods. Therefore, the use of a UV-protective layer is particularly important. A three-layer UV-protective layer effectively prevents UV damage to the corrugated pipe, extending its service life. Simultaneously, the use of the buffer pad 7 effectively absorbs the impact force on the cable sheath under pressure, reducing corrugated pipe deformation and protecting the internal wiring of the cable from damage.

[0030] When corrugated pipes are used for industrial drainage, the pipes need to withstand significant internal water pressure and external pressure. Therefore, the design of the support rod 3 and reinforcing rib 4 effectively disperses the internal and external pressures, improving the pipe's pressure resistance and rigidity. Simultaneously, the high-strength polyethylene material of the inner pipe 1 and outer pipe 2 provides excellent corrosion resistance, preventing damage from corrosion during long-term use. The design of the flange 5 and bolt holes 6 ensures the sealing and stability of the pipe connections, preventing leakage and detachment caused by loose connections.

[0031] In summary, this utility model provides a double-walled corrugated pipe with enhanced compressive strength. By adding support rods 3 and reinforcing ribs 4, a continuous support network is formed, effectively improving the compressive strength and rigidity of the corrugated pipe. The use of an anti-UV protective layer and a buffer pad 7 further enhances the weather resistance and impact resistance of the corrugated pipe, ensuring its good performance and structural stability in various application scenarios. In this embodiment, the inner tube 1 and outer tube 2 of the corrugated pipe are both made of high-strength polyethylene, the support rods 3 and reinforcing ribs 4 are made of glass fiber reinforced composite material, the buffer pad 7 is made of high-elasticity rubber material, and the anti-UV protective layer includes a base coating 8, an intermediate coating 9, and a top coating 10, which are respectively made of polyurethane resin, alumina, and polyurethane resin. Through this structural design, the double-walled corrugated pipe of this utility model has broad application prospects and good market potential.

[0032] This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0033] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0034] 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 double-wall bellows with enhanced pressure resistance, comprising an inner tube (1) and an outer tube (2), characterized in that, A plurality of support structures are arranged between the inner tube (1) and the outer tube (2), the support structures comprising a plurality of support rods (3) arranged vertically between the inner tube (1) and the outer tube (2), the support rods (3) being uniformly distributed along the axial direction of the bellows, and the corrugated portions of the inner tube (1) and the outer tube (2) being connected by the support rods (3) to form a continuous support network.

2. A double wall corrugated pipe with enhanced pressure resistance according to claim 1, characterized in that, Each support rod (3) comprises two connecting portions fixed respectively on the inner tube (1) and the outer tube (2), and a reinforcing rib (4) arranged between the two connecting portions, the reinforcing rib (4) being in a wave shape, and the reinforcing rib (4) being made of glass fiber reinforced composite material.

3. The double wall corrugated pipe with enhanced pressure resistance according to claim 1, characterized in that, The inner tube (1) and the outer tube (2) are made of high-strength polyethylene, and the outer surface of the outer tube (2) is coated with an ultraviolet protection layer.

4. A double wall corrugated pipe with enhanced pressure resistance according to claim 3, characterized in that, The ultraviolet protection layer comprises a base coat (8) arranged on the outer surface of the outer tube (2), an intermediate coat (9) arranged on the base coat (8), and a top coat (10) arranged on the intermediate coat (9), the base coat (8) and the top coat (10) being made of polyurethane resin material, and the intermediate coat (9) being made of aluminum oxide material.

5. The double wall corrugated pipe with enhanced pressure resistance according to claim 1, characterized in that, The connecting device comprises flanges (5) arranged at the ends of the inner tube (1) and the outer tube (2), and a plurality of bolt holes (6) arranged on the flanges (5), the flanges (5) being connected to the flanges (5) of adjacent bellows by bolts and nuts.

6. The double wall corrugated pipe with enhanced pressure resistance according to claim 1, characterized in that, A plurality of buffer pads (7) are arranged on the inner wall and the outer wall of the bellows, the buffer pads (7) being made of high-elastic rubber material and being uniformly distributed along the axial direction of the bellows.

7. A double wall corrugated pipe with enhanced pressure resistance according to claim 6, characterized in that, The thickness of the buffer pad (7) is 5mm, and the buffer pad (7) is fixed on the corrugated portions of the inner tube (1) and the outer tube (2) by adhesion or mechanical fixation.

8. The double wall corrugated pipe with enhanced pressure resistance according to claim 4, characterized in that, The thickness of the base coat (8) is 50μm, the thickness of the intermediate coat (9) is 100μm, and the thickness of the top coat (10) is 50μm.

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