A multi-layered protective steel lined teflon pipe

Abstract

The utility model relates to pipeline technical field, and disclose a multilayer protection's steel lining four fluorine pipeline, including the inner lining, the surface fixedly connected with the cover of inner lining has the protection sleeve through the adhesive bonding of cover's surface. The utility model discloses through multilayer protection structure synergy effect, has improved the comprehensive protection performance of pipeline significantly, the porous structure of heat preservation layer in protection sleeve can effectively block the heat exchange inside and outside pipeline, and the stainless steel material of cooperation cover reduces heat conduction, solved the problem that traditional pipeline heat preservation is poor, and energy loss is big, the high density fiber interlaced structure of sound insulation layer can absorb the sound wave produced by fluid impact, reduce noise propagation, improve industrial environment, the chloroprene rubber material of corrosion -resistant outer layer can resist external acid alkali, salt fog erosion, with the stainless steel material of cover forms double protection, greatly improves the service life of pipeline in complex external environment, need not additional equipment heat preservation, sound insulation device, reduced equipment cost and installation complexity.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to a multi-layered protective steel-lined PTFE pipeline. Background Technology

[0002] In the field of industrial fluid transportation, PTFE-lined steel pipes are widely used due to their excellent corrosion resistance, but their overall performance still has obvious defects.

[0003] Existing PTFE-lined steel pipes have poor thermal insulation performance, typically relying on a single PTFE lining or an outer layer of ordinary steel, which cannot effectively prevent heat exchange between the inside and outside of the pipe. When transporting high-temperature or low-temperature media, this can easily lead to significant energy loss, especially in industries such as chemical and pharmaceutical manufacturing where the media is sensitive to temperature. Additional insulation devices are required, increasing equipment costs and installation complexity.

[0004] Insufficient sound insulation is another prominent problem. When pipelines transport high-pressure fluids or gaseous media, the friction and impact between the fluid and the inner wall of the pipeline will generate significant noise. Traditional steel-lined PTFE pipes lack a dedicated sound insulation structure, and noise can easily propagate outward through the metal pipe shell, which not only affects the working environment but may also interfere with the normal operation of surrounding equipment, failing to meet the stringent noise control requirements of modern industry.

[0005] Although PTFE materials possess a certain degree of corrosion resistance, localized corrosion can still occur on the inner wall of pipelines under complex operating conditions, such as when transporting media containing high concentrations of chloride ions or strong oxidizing agents. Furthermore, the limited smoothness of the inner wall of traditional pipelines makes them prone to the accumulation of dirt and scale over long-term use, leading to increased fluid transport resistance and decreased transport efficiency. To maintain normal operation, regular pipeline cleaning and maintenance are required, which not only increases labor costs and downtime but may also further shorten the pipeline's lifespan due to mechanical damage during the cleaning process.

[0006] Therefore, developing a steel-lined PTFE pipe that combines excellent thermal insulation, sound insulation, corrosion resistance, and self-cleaning function has become an urgent need to overcome the shortcomings of existing technologies and meet the higher requirements of industrial fluid transportation. Therefore, those skilled in the art have provided a multi-layered protective steel-lined PTFE pipe to solve the problems mentioned in the background section. Utility Model Content

[0007] To address the issues of traditional PTFE-lined steel pipes lacking a protective layer, resulting in short service life and no self-cleaning capability, this invention provides a multi-layered PTFE-lined steel pipe.

[0008] This utility model provides a multi-layered protective steel-lined PTFE pipe, employing the following technical solution:

[0009] A multi-layered protective steel-lined PTFE pipe includes an inner lining, an outer lining fixedly connected to the surface of the inner lining, a protective sleeve bonded to the surface of the outer lining by an adhesive, the inner lining including a base layer, the inner wall of the base layer being sprayed with a self-cleaning coating, the protective sleeve including an insulation layer fitted onto the surface of the outer lining, the surface of the insulation layer being covered with a sound insulation layer, and the surface of the sound insulation layer being covered with a corrosion-resistant outer layer.

[0010] Optionally, both ends of the inner liner and the outer liner are integrally formed with flanges, and the surface of the flanges is provided with mounting holes.

[0011] Optionally, both ends of the protective sleeve are provided with grooves for use with mounting holes.

[0012] Optionally, the outer jacket is made of stainless steel, and the base layer is made of PTFE.

[0013] Optionally, the self-cleaning coating is applied by spraying with a graphene-based coating.

[0014] Optionally, the thermal insulation layer is made of thermal insulation cotton, and the sound insulation layer is made of sound insulation cotton.

[0015] Optionally, the corrosion-resistant outer layer is made of neoprene rubber.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. This utility model significantly improves the overall protection performance of pipelines through the synergistic effect of a multi-layer protective structure. The porous structure of the insulation layer in the protective sleeve can effectively block heat exchange between the inside and outside of the pipeline. Combined with the stainless steel material of the outer sleeve, it reduces heat conduction and solves the problems of poor insulation and high energy loss in traditional pipelines. The high-density fiber interlaced structure of the sound insulation layer can absorb the sound waves generated by fluid impact, reduce noise transmission, and improve the industrial environment. The neoprene rubber material of the corrosion-resistant outer layer can resist external acid, alkali and salt spray corrosion, forming a double protection with the stainless steel material of the outer sleeve. This greatly extends the service life of the pipeline in complex external environments, eliminating the need for additional insulation and sound insulation devices, and reducing equipment costs and installation complexity.

[0018] 2. The design of the self-cleaning coating of this utility model effectively optimizes fluid transportation efficiency and maintenance convenience. The PTFE material of the substrate layer ensures basic corrosion resistance, while the graphene-based self-cleaning coating on the inner wall utilizes its low surface energy and chemical inertness to reduce the adhesion and scaling of impurities in the fluid, thereby reducing transportation resistance. At the same time, the chemical bonding structure between the self-cleaning coating and the substrate layer ensures long-term stability under high-pressure fluid scouring, reducing the labor costs and downtime of traditional pipeline periodic cleaning. The interference fit between the outer jacket and the inner lining enhances the overall structural strength, enabling the pipeline to remain stable when transporting high-concentration, highly corrosive media, thus balancing corrosion resistance and transportation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the connection structure between the inner lining and the outer lining of this utility model.

[0022] Figure 4 This is a schematic diagram of the internal connection structure of the protective sleeve of this utility model.

[0023] Figure 5 This is a schematic diagram of the internal connection structure of the lining of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Inner lining; 11. Substrate layer; 12. Self-cleaning coating; 2. Outer jacket; 3. Protective sleeve; 31. Thermal insulation layer; 32. Sound insulation layer; 33. Corrosion-resistant outer layer; 4. Mounting holes; 5. Grooves. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] Example 1:

[0028] Please refer to Figure 1-5 A multi-layered protective steel-lined PTFE pipe includes an inner liner 1, an outer jacket 2 fixedly connected to the surface of the inner liner 1, and a protective sleeve 3 bonded to the surface of the outer jacket 2 by an adhesive. The inner liner 1 includes a base material layer 11, the inner wall of which is sprayed with a self-cleaning coating 12. The protective sleeve 3 includes an insulation layer 31 fitted onto the surface of the outer jacket 2, a sound insulation layer 32 covering the surface of the insulation layer 31, and a corrosion-resistant outer layer 33 covering the surface of the sound insulation layer 32.

[0029] In this embodiment: the inner wall of the substrate layer 11 is coated with a uniform self-cleaning coating 12 by a high-pressure spraying process. The self-cleaning coating 12 forms a chemical bond with the molecules of the substrate layer 11, ensuring that it will not fall off under long-term fluid scouring. The inner wall of the outer jacket 2 is tightly attached to the outer wall of the inner lining 1, and the connection is fixed by interference fit. This provides structural support for the inner lining 1 and resists external impact by the high strength of stainless steel. The thermal insulation layer 31 is made of porous thermal insulation cotton. Its inner wall is completely attached to the outer wall of the outer jacket 2 by adhesive. The porous structure blocks heat conduction. The sound insulation layer 32 is a high-density fiber interwoven structure. It is tightly wrapped with the thermal insulation layer 31 by adhesive. It can absorb and scatter the sound waves generated by fluid impact. The corrosion-resistant outer layer 33 is firmly bonded to the sound insulation layer 32 by a vulcanization process, forming an outer layer of protection for the internal structure.

[0030] Example 2:

[0031] Reference Figure 1-5 Both ends of the inner liner 1 and the outer jacket 2 are integrally formed with flanges, and the surface of the flanges is provided with mounting holes 4. Both ends of the protective sleeve 3 are provided with grooves 5 that are used to match the mounting holes 4. The outer jacket 2 is made of stainless steel, the base material layer 11 is made of PTFE, the self-cleaning coating 12 is made of graphene-based coating, the thermal insulation layer 31 is made of thermal insulation cotton, the sound insulation layer 32 is made of sound insulation cotton, and the corrosion-resistant outer layer 33 is made of neoprene rubber.

[0032] In this embodiment: the flange and mounting hole 4 can achieve quick connection between pipes via screws and bolts, ensuring the sealing and structural stability of the connection, preventing media leakage. Simultaneously, the one-piece molding process enhances the connection strength between the flange and the pipe body, resisting tensile forces from the transport pressure. The groove 5 provides space for the flange bolts during pipe connection, preventing the protective sleeve 3 from deforming due to compression, while ensuring the fit between the protective sleeve 3 and the outer sleeve 2, ensuring that the thermal insulation and sound insulation performance are not affected by the connection operation. The high strength of stainless steel provides structural support for the pipe, resisting external impacts and internal pressure. The corrosion resistance of PTFE ensures that the inner lining 1 is adaptable to various chemical media. The complementary properties of the materials enhance the overall durability of the pipeline. The sheet-like structure of graphene enhances the wear resistance and corrosion resistance of the coating, and its low surface energy properties strengthen the self-cleaning effect. It can adapt to complex media containing solid particles and high corrosiveness, extending the service life of the coating. The porous structure of the thermal insulation cotton improves the thermal insulation efficiency, and the fiber structure of the sound insulation cotton enhances the sound wave absorption capacity. Both materials are cost-effective and easy to process, balancing performance and economy. The chloroprene rubber, with its acid and alkali resistance and wear resistance, can resist external environmental erosion. At the same time, the elastic properties of rubber can buffer external impacts, protecting the internal thermal insulation layer 31 and sound insulation layer 32 from mechanical damage and extending the service life of the protective sleeve 3.

[0033] The implementation principle of this utility model is as follows: When in use, the substrate layer 11 of the inner lining 1 is in direct contact with the conveying medium, and its corrosion resistance ensures that the medium does not corrode the main body of the pipeline; the self-cleaning coating 12 of the inner wall reduces the adhesion of impurities in the medium through its low surface energy characteristics, and when the fluid flows, it carries a small amount of impurities away from the inner wall, thereby achieving self-cleaning and reducing the conveying resistance.

[0034] The outer jacket 2 provides structural support for the inner lining 1, resisting internal medium pressure and external impact, while also closely fitting with the inner lining 1 to form a stable inner layer structure.

[0035] The thermal insulation layer 31 of the protective sleeve 3 uses a porous structure to block heat transfer and reduce the temperature loss of the medium; the fiber interlaced structure of the sound insulation layer 32 absorbs the sound waves generated by fluid impact and reduces noise transmission; the corrosion-resistant outer layer 33 resists the corrosion of acids, alkalis and salt spray in the external environment and protects the internal structure.

[0036] The flanges at both ends of the pipeline are connected by bolts to ensure the sealing of the multi-section pipeline connection. The groove 5 of the protective sleeve 3 provides space for connection operation, ensuring that the overall structure can still maintain its heat insulation and sound insulation performance after connection. The various structures work together to achieve efficient, stable and low-maintenance transportation of the medium.

[0037] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A multi-layered protective steel-lined PTFE pipe, comprising an inner lining (1), characterized in that: The inner lining (1) is fixedly connected to the outer cover (2), and the outer cover (2) is bonded to the surface of the protective sleeve (3) by an adhesive. The liner (1) includes a substrate layer (11), the inner wall of which is coated with a self-cleaning coating (12); The protective sleeve (3) includes a thermal insulation layer (31) fitted onto the surface of the outer sleeve (2), the surface of the thermal insulation layer (31) is covered with a sound insulation layer (32), and the surface of the sound insulation layer (32) is covered with a corrosion-resistant outer layer (33).

2. The multi-layered protective PTFE-lined steel pipe according to claim 1, characterized in that: Both ends of the inner liner (1) and the outer liner (2) are integrally formed with flanges, and the surface of the flanges is provided with mounting holes (4).

3. The multi-layered protective PTFE-lined steel pipe according to claim 2, characterized in that: Both ends of the protective sleeve (3) are provided with grooves (5) for use with the mounting holes (4).

4. The multi-layered protective PTFE-lined steel pipe according to claim 1, characterized in that: The outer jacket (2) is made of stainless steel, and the substrate layer (11) is made of PTFE.

5. A multi-layered protective steel-lined PTFE pipe according to claim 1, characterized in that: The self-cleaning coating (12) is formed by spraying graphene-based coating.

6. The multi-layered protective PTFE-lined steel pipe according to claim 1, characterized in that: The thermal insulation layer (31) is made of thermal insulation cotton, and the sound insulation layer (32) is made of sound insulation cotton.

7. A multi-layered protective PTFE-lined steel pipe according to claim 1, characterized in that: The corrosion-resistant outer layer (33) is made of chloroprene rubber.

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