An ultra-high pressure pipe insulation structure

Abstract

The utility model discloses an ultrahigh pressure pipeline heat preservation structure, including heat preservation layer subassembly, support subassembly, sealing assembly and protection layer subassembly. Heat preservation layer subassembly adopts the flame -retardant polyurethane hard foam pipe shell, is fixed through stainless steel silk and stainless steel band, support subassembly is by the hoop type support ring and rubber gasket and is composed, adjusts interval according to pipe diameter, sealing assembly realizes joint sealing and thermal expansion and contraction compensation with the use of deep -cold adhesive and expansion joint filling material, protection layer subassembly provides mechanical strength and weather resistance with glass -steel and flame -retardant malthite coating. The application can effectively improve the heat preservation performance of ultrahigh pressure pipeline, prevent heat loss and material drop, and facilitate overhauling and maintenance, ensure long -term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline insulation technology, and in particular to an ultra-high pressure pipeline insulation structure. Background Technology

[0002] With the development of industrial pipeline systems, especially those operating under complex conditions such as high temperature and high pressure, the requirements for pipeline insulation structures are becoming increasingly stringent. Pipeline insulation structures not only need to possess excellent insulation performance but must also be able to withstand the mechanical and thermal stresses under ultra-high pressure environments to ensure the safety and stability of the system. However, existing pipeline insulation technologies have significant performance bottlenecks and application limitations under ultra-high pressure conditions.

[0003] Existing pipe insulation structures generally suffer from the following shortcomings: First, they lack structural reinforcement designs for ultra-high pressure environments, making them difficult to withstand high-pressure impacts; second, the stability of insulation materials is poor under the combined effects of high pressure and high temperature, making them prone to deformation or detachment; and third, they fail to effectively solve the problem of integrated sealing and insulation at high-pressure pipe connections, resulting in significant local heat loss and a high risk of structural failure.

[0004] Therefore, there is an urgent need to develop a new type of pipeline insulation structure specifically designed for ultra-high pressure conditions to overcome the aforementioned deficiencies and improve the safety, stability, and energy efficiency of pipeline systems. This invention is based on a design using flame-retardant rigid polyurethane foam as the insulation layer and fiberglass as the protective layer. It incorporates innovative measures such as layered insulation, support ring installation, expansion joint filling, and a removable insulation layer. The aim is to solve the problems existing in the current technology and meet the high-performance requirements of ultra-high pressure pipelines under complex operating conditions. Utility Model Content

[0005] The purpose of this invention is to provide an ultra-high pressure pipeline insulation structure.

[0006] To achieve the above objectives, this utility model is implemented according to the following technical solution:

[0007] This utility model includes an insulation layer assembly, a support assembly, a sealing assembly, and a protective layer assembly. The insulation layer assembly is disposed on the outer surface of the pipe, the support assembly is disposed below the insulation layer assembly of the riser, the sealing assembly is disposed at the joint of the insulation layer assembly, and the protective layer assembly covers the outermost layer of the insulation layer assembly. Further, the insulation layer assembly includes a flame-retardant rigid polyurethane foam shell, stainless steel wire fasteners, and stainless steel strapping fasteners. The flame-retardant rigid polyurethane foam shell is directly wrapped around the outer surface of the pipe and fixed every 300mm by stainless steel wire fasteners with a diameter of 1.6mm. The two ends of the stainless steel wire fasteners are twisted together and embedded inside the flame-retardant rigid polyurethane foam shell. When the insulation layer thickness is ≥80mm, a multi-layer insulation structure is adopted, and the outermost layer is fixed using 12×0.6 stainless steel strapping fasteners. Preferably, the joints of the insulation layer assembly are staggered by at least 50mm, the upper and lower layers are pressed together, no gaps are left at the end faces, and the final gap is filled with foamed polyurethane material.

[0008] Furthermore, the support assembly includes a clamp-type support ring and a rubber gasket. The clamp-type support ring is installed on the outside of the riser insulation layer. When the riser height exceeds 4m, the first support ring is installed 100mm above the lowest flange. For longer risers, the support spacing is adjusted according to the pipe diameter: 4m for pipe diameter ≤ 20mm, and 3m for pipe diameter ≥ 25mm. The inner side of the clamp-type support ring is lined with a rubber gasket to prevent corrosion or stress concentration caused by direct contact between different materials. The support ring avoids nozzles, branch pipes, or other obstacles to ensure flexible and stable installation.

[0009] Furthermore, the sealing assembly includes a cryogenic adhesive and an expansion joint filler. The cryogenic adhesive is used to seal the longitudinal joints of the insulation layer, with the joints arranged in an alternating pattern to enhance the sealing effect. Expansion joints are installed every 10m to 12m, with a joint width of 30mm, and are filled with polyurethane foam to ensure insulation performance and structural stability. The sealing assembly can effectively cope with the thermal expansion and contraction problem under ultra-high pressure environments, while preventing the insulation material from falling off or failing due to long-term use.

[0010] The protective layer assembly includes a fiberglass protective layer and a flame-retardant mastic coating. The fiberglass protective layer covers the outermost layer of the insulation layer assembly, providing mechanical strength and weather resistance. After the fiberglass protective layer is installed, two layers of 1.5-3mm thick flame-retardant mastic are applied using a paddle-painting method. A screen or fiberglass cloth is laid between each layer, with the joints facing downwards and overlapping by at least 50mm to ensure a smooth and flat surface. As an improvement, for valves, flanges, and other components requiring maintenance, a detachable insulation box design is used. The insulation box is made of polyurethane material and fixed with stainless steel wire mesh, facilitating maintenance while ensuring consistent insulation performance.

[0011] The beneficial effects of this utility model are:

[0012] This invention relates to an ultra-high pressure pipeline insulation structure. Compared with existing technologies, this invention achieves efficient insulation, stable support, excellent sealing, and comprehensive protection through the synergistic effect of insulation layer components, support components, sealing components, and protective layer components. In practical applications, this insulation structure is suitable for ultra-high pressure pipeline systems under various complex operating conditions, such as petrochemical, natural gas transmission, and industrial refrigeration fields. Its construction process strictly follows the above implementation steps, ensuring that each step meets design requirements and technical specifications, thereby providing a reliable guarantee for the safe operation and long-term use of ultra-high pressure pipelines. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 This is a utility model Figure 1 Enlarged view of part A in the middle;

[0015] Figure 3 This is a utility model Figure 1 Enlarged view of part B in the middle section;

[0016] Figure 4 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the external structure on the other side of this utility model.

[0018] In the diagram: 1. Insulation layer assembly; 2. Support assembly; 3. Sealing assembly; 4. Protective layer assembly; 5. Flame-retardant rigid polyurethane foam tube shell; 6. Stainless steel wire fastener; 7. Stainless steel strap binding; 8. Clamp-type support ring; 9. Rubber gasket; 10. Cryogenic adhesive; 11. Expansion joint filler; 12. Fiberglass protective layer; 13. Flame-retardant mastic coating; 14. Detachable insulation box; 15. Riser. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0020] This utility model relates to an ultra-high pressure pipeline insulation structure, the specific implementation of which will be described in conjunction with the attached diagram. Figure 1 To be continued Figure 5A detailed description is provided below. This insulation structure consists of an insulation layer assembly 1, a support assembly 2, a sealing assembly 3, and a protective layer assembly 4. These components work together in practical applications to ensure the insulation performance, mechanical strength, sealing performance, and durability of the pipeline. The specific embodiments of this utility model will be described in detail below with reference to the specific structures and markings shown in the accompanying drawings.

[0021] First, regarding the implementation of insulation layer component 1, it is directly wrapped around the outer surface of the ultra-high pressure pipeline, and its core material is flame-retardant rigid polyurethane foam shell 5. This material has excellent thermal insulation performance and flame-retardant properties, effectively reducing heat loss and meeting safety requirements. In actual construction, the flame-retardant rigid polyurethane foam shell 5 is cut to a suitable length according to the outer diameter of the pipeline and directly wrapped around the pipeline surface. To ensure the stability of the insulation layer, stainless steel wire fasteners 6 with a diameter of 1.6mm are used for fixing every 300mm. The two ends of the stainless steel wire fasteners 6 are twisted and embedded inside the insulation layer, thus avoiding corrosion or loosening problems caused by exposed fasteners. When the insulation layer thickness reaches or exceeds 80mm, a multi-layer insulation structure design is adopted, that is, a second or even more insulation layers are superimposed on the first insulation layer, and each layer is seamlessly connected by a seam pressing treatment. The specific method for sealing the joints involves staggering the joints of the upper and lower insulation layers by at least 50mm, leaving no gaps at the ends, and filling the gaps at the final ends with polyurethane foam to ensure the integrity and sealing of the insulation layer. Furthermore, the outermost insulation layer is reinforced with 12×0.6 stainless steel strapping 7 to further improve its tensile strength and stability.

[0022] Secondly, the main function of support component 2 is to provide support for the insulation layer of the riser 15, preventing deformation or detachment of the insulation layer due to its own weight or external vibration. The core components of support component 2 are the clamp-type support ring 8 and the rubber gasket 9. During installation, when the height of the riser 15 exceeds 4m, the first clamp-type support ring 8 is installed 100mm above the weld seam of the lowest elbow. For longer risers 15, the support spacing is adjusted according to the pipe diameter: when the pipe diameter is less than or equal to 20mm, the support spacing is 4m; when the pipe diameter is greater than or equal to 25mm, the support spacing is 3m. The inner side of the clamp-type support ring 8 is lined with a rubber gasket 9. This design effectively avoids direct contact between different materials, preventing damage caused by electrochemical corrosion or stress concentration. At the same time, the installation position of the clamp-type support ring 8 must avoid pipe nozzles, branch pipes, or other obstacles to ensure installation flexibility and stability. In practical applications, the clamp-type support ring 8 is fixed to the outside of the riser 15 by bolt fastening. The fastening force should be moderate to avoid excessive compression or loosening of the insulation layer.

[0023] Next, the main function of sealing component 3 is to enhance the sealing performance of the insulation layer, preventing the penetration of hot and cold air and the intrusion of moisture. Sealing component 3 includes cryogenic adhesive 10 and expansion joint filler 11. In actual construction, cryogenic adhesive 10 is used to seal the longitudinal joints of the insulation layer. The joints are arranged in a staggered manner to enhance the sealing effect and distribute stress. An expansion joint is set every 10m to 12m, with a joint width of 30mm. The expansion joint is filled with foamed polyurethane material as expansion joint filler 11. This design can effectively cope with the thermal expansion and contraction of pipelines caused by temperature changes under ultra-high pressure environment, while preventing the insulation material from falling off or failing due to long-term use. When filling the expansion joint, it is necessary to ensure that the foamed polyurethane material completely fills the gap and is compacted to ensure sealing and structural stability. In addition, the application of cryogenic adhesive 10 should be uniform and cover the entire joint area to form a continuous sealing layer.

[0024] Finally, the main function of the protective layer assembly 4 is to provide mechanical and weather-resistant protection for the insulation layer. The protective layer assembly 4 includes a fiberglass protective layer 12 and a flame-retardant mastic coating 13. In actual construction, the fiberglass protective layer 12 covers the outermost layer of the insulation layer assembly 1. The construction method involves manually laying fiberglass cloth and applying resin, which cures to form a robust protective layer. The fiberglass protective layer 12 has high mechanical strength and corrosion resistance, effectively resisting the impact of the external environment on the insulation layer. After the fiberglass protective layer 12 is completed, two layers of flame-retardant mastic coating 13 are applied using a padding method, each layer being 1.5-3mm thick. During the coating process, a screen or fiberglass cloth must be laid between each layer to enhance the adhesion and crack resistance of the coating. The joints of the screen or fiberglass cloth must face downwards and overlap by at least 50mm to ensure a smooth and even coating surface. Furthermore, for components such as valves and flanges requiring maintenance, a removable insulation box 14 is used. The detachable insulation box 14 is made of polyurethane material, which facilitates maintenance and operation while ensuring consistent insulation performance. In practical applications, the installation of the detachable insulation box 14 must ensure a tight fit with the surrounding insulation layer to avoid gaps or looseness.

[0025] In summary, the ultra-high pressure pipeline insulation structure of this invention achieves efficient insulation, stable support, good sealing, and comprehensive protection through the synergistic effect of the insulation layer component 1, support component 2, sealing component 3, and protective layer component 4. In practical applications, this insulation structure is suitable for ultra-high pressure pipeline systems under various complex operating conditions, such as petrochemical, natural gas transmission, and industrial refrigeration fields. Its construction process strictly follows the above implementation steps, ensuring that each step meets design requirements and technical specifications, thereby providing a reliable guarantee for the safe operation and long-term use of ultra-high pressure pipelines.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A thermal insulation structure for ultra-high pressure pipelines, characterized in that: The device includes an insulation layer assembly (1), a support assembly (2), a sealing assembly (3), and a protective layer assembly (4). The insulation layer assembly (1) is disposed on the outer surface of the riser (15), the support assembly (2) is disposed on the lower side of the insulation layer assembly (1) of the riser (15), the sealing assembly (3) is disposed at the joint of the insulation layer assembly (1), and the protective layer assembly (4) covers the outermost layer of the insulation layer assembly (1).

2. The ultra-high pressure pipeline insulation structure according to claim 1, characterized in that: The insulation layer assembly (1) includes a flame-retardant polyurethane rigid foam tube shell (5), a stainless steel wire fastener (6), and a stainless steel strap tie (7). The flame-retardant polyurethane rigid foam tube shell (5) is directly wrapped around the outer surface of the riser (15). It is fixed every 300mm by a stainless steel wire fastener (6) with a diameter of 1.6mm. The two ends of the stainless steel wire fastener (6) are twisted together and embedded inside the flame-retardant polyurethane rigid foam tube shell (5). When the thickness of the insulation layer assembly (1) is greater than or equal to 80mm, a multi-layer flame-retardant polyurethane rigid foam tube shell (5) insulation structure is adopted, and a 12×0.6 stainless steel strap tie (7) is used to fix the outermost layer.

3. The ultra-high pressure pipeline insulation structure according to claim 2, characterized in that: The joints of the insulation layer assembly (1) are staggered by at least 50mm, the upper and lower layers are pressed together, the end faces are not left with gaps, and the gaps at the final ends are filled with foamed polyurethane material.

4. The ultra-high pressure pipeline insulation structure according to claim 1, characterized in that: The support assembly (2) includes a clamp-type support ring (8) and a rubber gasket (9). The clamp-type support ring (8) is installed on the outside of the riser (15). When the height of the riser (15) exceeds 4m, the first clamp-type support ring (8) is set 100mm above the lowest flange. For longer risers (15), the support spacing is adjusted according to the pipe diameter. When the pipe diameter is less than or equal to 20mm, the support spacing is 4m. When the pipe diameter is greater than or equal to 25mm, the support spacing is 3m. The inner side of the clamp-type support ring (8) is lined with a rubber gasket (9).

5. The ultra-high pressure pipeline insulation structure according to claim 1, characterized in that: The sealing component (3) includes a cryogenic adhesive (10) and an expansion joint filler (11). The cryogenic adhesive (10) is used to seal the longitudinal joints of the insulation layer component (1), with the joints arranged in an alternating pattern. An expansion joint is set every 10m to 12m, with a joint width of 30mm, and the interior is filled with polyurethane foam as the expansion joint filler (11).

6. The ultra-high pressure pipeline insulation structure according to claim 1, characterized in that: The protective layer assembly (4) includes a fiberglass protective layer (12) and a flame-retardant mastic coating (13). The fiberglass protective layer (12) covers the outermost layer of the insulation layer assembly (1) and is coated with two layers of flame-retardant mastic coating (13), each layer being 1.5-3mm thick. A screen or glass cloth is laid between each layer, with the joints facing downwards and overlapping by at least 50mm.

7. The ultra-high pressure pipeline insulation structure according to claim 6, characterized in that: For valves or flange components that require maintenance, a detachable insulation box (14) is used, which is made of polyurethane material.

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