Ship pipeline system, preheating insulation heat preservation pipe and insulation protection sleeve

Abstract

The invention provides a ship pipeline system, a preheating insulation heat preservation pipe and an insulation protection sleeve. The ship pipeline system comprises a flange, the insulation protection sleeve, a circulation pipeline, a heat preservation layer, an insulation heat preservation outer sleeve, an internal heat tracing band guide pipe and an external heat tracing band protection pipe. The two axial ends of the circulation pipeline penetrate through the insulation protection sleeves to be in butt joint with the flanges respectively, any two adjacent preheating insulation protection pipes are fixedly connected through the adjacent flanges, one ends of the insulation protection sleeves are in butt joint with the flanges, and therefore the insulation protection sleeves are fixed to the flanges, and the heat preservation layers are arranged between the insulation protection sleeves and the circulation pipeline. The insulation heat preservation outer sleeve wraps the area, located outside the insulation protection sleeve, of the circulation pipeline, the insulation protection sleeve comprises fixing bases, the external heat tracing band protection pipe is connected with the fixing bases of any two adjacent preheating insulation heat preservation pipes, and therefore connection of internal heat tracing band guide pipes between the two adjacent insulation heat preservation pipes is achieved. And the continuity of the heat tracing band conduit in the whole ship pipeline is realized.

Description

Technical Field

[0001] The present application belongs to the technical field of thermal insulation of ship piping systems, and in particular relates to a ship piping system, a preheating insulation pipe and an insulation protective sleeve. Background Art

[0002] Insulation and heat tracing are required in ship piping systems. When the medium transported in ship piping systems is a low-temperature medium such as fresh water, fuel oil (especially heavy oil), sewage, etc., it may freeze due to low ambient temperature in cold seas (or winter), resulting in pipe blockage or rupture. Or, the medium transported is a high-freezing point medium: heavy oil, lubricating oil, etc., which increases viscosity or solidifies at low temperatures, affecting transportation. When a ship sails to low-temperature seas, the ambient temperature may be lower than the insulation capacity of the insulation material, and pre-heating needs to be turned on.

[0003] There are multiple pre-insulated thermal insulation pipes in the ship piping system. Adjacent pre-insulated thermal insulation pipes are connected by flanges. The continuity of electric heating cannot be achieved at the flange connection of the pre-insulated pipe ends. Currently, in order to achieve continuity, the only way is to weld the heating pipes. However, the removal after welding is cumbersome and the subsequent maintenance is difficult. Summary of the invention

[0004] The present application provides a ship piping system, which can realize the connection of the heating pipe between two adjacent insulating and heat-preserving pipes, realize the continuity of the heating pipe in the entire ship piping, is relatively convenient to dismantle, and is simple to maintain later.

[0005] On the one hand, the present application provides a ship piping system, comprising a plurality of preheating insulating and heat-insulating pipes, each of which is provided with flanges at both axial ends thereof, and any two adjacent preheating insulating and heat-insulating pipes are connected via the flanges, and each of the preheating insulating and heat-insulating pipes comprises: an insulating protective sleeve, one end of which is connected to the flange, and an accommodating space is provided inside, including a fixing seat; a circulation pipeline, both axial ends of which respectively penetrate the insulating protective sleeve and are connected to the flange; an insulation layer is provided between the insulating protective sleeve and the circulation pipeline; an insulating and heat-insulating outer jacket, which wraps the circulation pipeline in an area outside the insulating protective sleeve; an internal heating tape duct, which penetrates the insulating and heat-insulating outer jacket and the insulation layer and is connected to the fixing seat of the insulating protective sleeve; and an external heating tape protection pipe, which connects the fixing seats of any two adjacent preheating insulating and heat-insulating pipes.

[0006] In some optional embodiments, the thickness of the insulating thermal insulation jacket is greater than the thickness of the thermal insulation layer, and the insulating thermal insulation jacket at least covers a portion of the insulating protective jacket close to itself.

[0007] In some optional embodiments, the insulating protective cover also includes a sleeve-shaped body, the sleeve-shaped body has a accommodating space inside, the wall forming the sleeve-shaped body has at least one mounting hole, the mounting hole is connected to the accommodating space, the fixing seat has a through hole, which is connected to the mounting hole, the through hole is connected to the mounting hole, the number of the fixing seats is less than or equal to the number of the mounting holes, and the fixing seats and the mounting holes are arranged in a one-to-one correspondence.

[0008] In some optional embodiments, the material between the insulation layer and the insulating outer jacket is an insulating foam material, and the insulating foam material is any one of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, foam glass, foam cement, aerogel felt, melamine foam and bio-based foam material.

[0009] In some optional embodiments, the sleeve-shaped body includes a variable diameter segment protective sleeve and a constant diameter segment protective sleeve, the variable diameter segment protective sleeve has an increasing diameter in its own axial direction, and the maximum diameter of the variable diameter segment protective sleeve is the same as the diameter of the constant diameter segment protective sleeve.

[0010] In some optional embodiments, the mounting holes are provided in the reducing segment protective sleeve, and a plurality of the mounting holes are evenly arranged in the circumference of the sleeve-shaped body.

[0011] In some optional embodiments, the surface of the sleeve-shaped body surrounding the mounting hole is provided with threads, the end of the fixing seat that interfaces with the mounting hole is provided with threads, and the fixing seat and the mounting hole are threadedly connected.

[0012] In some optional embodiments, the reducing section protective sleeve is located on the peripheral side of the mounting hole and is welded to the fixing seat.

[0013] In some optional embodiments, the fixing seat is a cylindrical fixing sleeve, the through hole is set in the axial direction of the cylindrical fixing sleeve, one end of the cylindrical fixing sleeve is set on the sleeve-shaped body, and the other end is inclined toward the direction of the flange, and the angle between the central axis of the cylindrical fixing sleeve and the central axis of the sleeve-shaped body is in the range of 30° to 80°.

[0014] On the other hand, the present application provides an insulating protective cover, which is the insulating protective cover mentioned in any one of the above items.

[0015] The beneficial effects brought by this application are as follows:

[0016] The ship piping system includes flanges, insulating protective sleeves, flow pipes, insulation layers, insulating jackets, internal heating tape ducts and external heating tape protective pipes. The insulating protective sleeve has a accommodating space inside, and the two axial ends of the circulation pipeline respectively penetrate the insulating protective sleeve and are connected with the flange. Any two adjacent preheating insulating protective pipes are fixedly connected through adjacent flanges. One end of the insulating protective sleeve is connected with the flange, thereby realizing that the insulating protective sleeve is fixed to the flange. The insulation layer is arranged between the insulating protective sleeve and the circulation pipeline. The insulating thermal insulation jacket wraps the circulation pipeline in the area outside the insulating protective sleeve. The insulation layer and the insulating thermal insulation jacket are used to insulate and heat the circulation pipeline to ensure temperature stability throughout the whole process. The insulating protective sleeve includes a fixing seat, and the internal heating tape duct penetrates the insulating thermal insulation jacket and the insulation layer is connected with the fixing seat of the insulating protective sleeve to avoid direct exposure to the external environment and reduce the risk of mechanical damage or corrosion. The number of fixing seats is less than or equal to the number of mounting holes. The fixing seats and the mounting holes are arranged one by one, allowing flexible configuration of the position of the internal heating tape duct. The external heating tape protection pipe is connected to the fixing seats of any two adjacent preheating insulating thermal insulation pipes for connection, thereby realizing the heating pipe connection between the two adjacent insulating thermal insulation pipes, realizing the continuity of the internal heating tape duct in the entire ship pipeline, and being convenient to dismantle and simple to maintain in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the separation of the connection area of ​​two adjacent pre-insulated thermal insulation pipes provided in one embodiment of the present application;

[0018] Figure 2 A schematic diagram of the partial structure of a pre-insulated thermal insulation pipe provided in one embodiment of the present application.

[0019] In the figure, 1-flange; 2-insulating protective sleeve; 21-sleeve-shaped body; 211-mounting hole; 212-variable diameter segment protective sleeve; 213-constant diameter segment protective sleeve; 22-fixing seat; 221-through hole; 3-circulation pipeline; 4-insulating layer; 5-insulating thermal insulation jacket; 6-internal heating tape duct; 7-external heating tape protective pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Insulation and heat tracing are required in ship piping systems. When the medium transported in ship piping systems is a low-temperature medium such as fresh water, fuel oil (especially heavy oil), sewage, etc., it may freeze due to low ambient temperature in cold seas (or winter), resulting in pipe blockage or rupture. Or, the medium transported is a high-freezing point medium: heavy oil, lubricating oil, etc., which increases viscosity or solidifies at low temperatures, affecting transportation. When a ship sails to low-temperature seas, the ambient temperature may be lower than the insulation capacity of the insulation material, and pre-heating needs to be turned on.

[0022] There are multiple pre-insulated thermal insulation pipes in the ship piping system. Adjacent pre-insulated thermal insulation pipes are connected by flange 1. The continuity of electric heating cannot be achieved at the connection of the pre-insulated pipe end flange 1. Currently, in order to achieve continuity, the only way is to weld the heating pipes. However, the removal after welding is cumbersome and the subsequent maintenance is difficult.

[0023] This application is combined with the drawings in the specification Figure 1 and Figure 2 Detailed description of ship piping system, preheating insulation pipe and insulation protective cover

[0024] The present application provides a ship piping system, which can realize the connection of the heating pipe between two adjacent preheating insulation pipes, realize the continuity of the heating pipe in the entire ship piping, is relatively convenient to dismantle, and is simple to maintain later.

[0025] The present application provides a ship piping system, including a plurality of preheating insulation pipes, each of which is provided with flanges 1 at both ends of the axial direction, and any two adjacent preheating insulation pipes are connected by the flanges 1, and each preheating insulation pipe includes: an insulating protective sleeve 2, one end of which is connected to the flange 1, including a sleeve body 21 and a fixing seat 22, the sleeve body 21 has a receiving space inside, and the wall forming the sleeve body 21 has at least one mounting hole 211, and the mounting hole 211 is connected to the receiving space; the fixing seat 22 has a through hole 221, which is connected to the mounting hole 211, and the through hole 221 and the mounting The holes 211 are connected, the number of the fixing seats 22 is less than or equal to the number of the mounting holes 211, and the fixing seats 22 and the mounting holes 211 are arranged one by one; the circulation pipeline 3, the two axial ends of which respectively penetrate the insulating protection sleeve 2 and are connected to the flange 1; the thermal insulation layer 4 is arranged between the insulating protection sleeve 2 and the circulation pipeline 3; the insulating thermal insulation jacket 5, wraps the circulation pipeline 3 and is located outside the insulating protection sleeve 2; the internal heating belt duct 6, penetrates the insulating thermal insulation jacket 5 and the insulation layer 4 and is connected to the fixing seat 22 of the insulating protection sleeve 2; the external heating belt protection pipe 7, connects any two adjacent preheating insulating thermal insulation pipes and the fixing seats 22.

[0026] Specifically, the preheating insulating and heat-preserving pipe includes: a flange 1, an insulating protective sleeve 2, a circulation pipeline 3, an insulating layer 4, an insulating and heat-preserving jacket 5, an internal heating tape duct 6 and an external heating tape protective pipe 7. The insulating protective sleeve 2 has a accommodating space inside, and the two axial ends of the circulation pipeline 3 respectively pass through the insulating protective sleeve 2 and dock with the flange 1. Any two adjacent preheating insulating and heat-preserving pipes are fixedly connected through the adjacent flanges 1. One end of the insulating protective sleeve 2 docks with the flange 1, thereby fixing the insulating protective sleeve 2 to the flange 1. The insulating layer 4 is arranged between the insulating protective sleeve 2 and the circulation pipeline 3. The insulating and heat-preserving jacket 5 wraps the circulation pipeline 3 located outside the insulating protective sleeve 2. The insulating layer 4 and the insulating and heat-preserving jacket 5 are used to insulate and keep the circulation pipeline 3 warm to ensure temperature stability throughout the entire process. The insulating protective sleeve 2 includes a sleeve-shaped body 21 and a fixing seat 22. The wall forming the sleeve-shaped body 21 has at least one mounting hole 211. The mounting hole 211 and the accommodating space The fixing seat 22 has a through hole 221 connected to the mounting hole 211, and the internal heating tape duct 6 passes through the insulating thermal insulation jacket 5 and the insulating layer 4 and is connected to the fixing seat 22 of the insulating protective sleeve 2 to avoid direct exposure to the external environment and reduce the risk of mechanical damage or corrosion. The number of the fixing seats 22 is less than or equal to the number of the mounting holes 211, and the fixing seats 22 and the mounting holes 211 are arranged in a one-to-one correspondence, allowing for flexible configuration of the position of the internal heating tape duct 6. The external heating tape protection tube 7 is connected to the fixing seats 22 of any two adjacent preheating insulating thermal insulation pipes for connection, thereby realizing the connection of the internal heating tape duct 6 between the two adjacent insulating thermal insulation pipes, realizing the continuity of the internal heating tape duct in the entire ship pipeline, being convenient to dismantle, and being simple to maintain in the later stage.

[0027] In some optional embodiments, the thickness of the insulating outer jacket 5 is greater than the thickness of the thermal insulation layer 4 , and the insulating outer jacket 5 at least covers a portion of the insulating protective jacket 2 close to itself.

[0028] Specifically, the insulating thermal insulation jacket 5 is used to protect the insulating layer 4. The insulating layer 4 is arranged between the insulating protective sleeve 2 and the circulation pipe 3. The insulating thermal insulation jacket 5 wraps the circulation pipe 3 in the area outside the insulating protective sleeve 2. The insulating thermal insulation jacket 5 at least covers the part of the insulating protective sleeve 2 close to itself, thereby achieving the docking between the insulating layers, avoiding the formation of gaps between the insulating layer 4 and the insulating thermal insulation jacket 5, thereby affecting the insulation effect. The insulating thermal insulation jacket 5 fully wraps the exposed part of the circulation pipe 3, adapts to the outdoor or large temperature difference environment, and prevents condensation or thermal bridge effect.

[0029] In some optional embodiments, the material between the thermal insulation layer 4 and the insulating outer jacket 5 is an insulating foaming material.

[0030] Specifically, the interior of the insulating foam thermal insulation material is filled with a closed-cell structure, which effectively blocks heat conduction and reduces heat exchange between the medium in the pipeline and the outside. The thermal insulation layer 4 is arranged between the insulating protective sleeve 2 and the circulation pipeline 3, and the insulating thermal insulation jacket 5 wraps the circulation pipeline 3 in the area outside the insulating protective sleeve 2. The insulating thermal insulation jacket 5 at least covers the part of the insulating protective sleeve 2 close to itself, avoiding the appearance of a gap in the area where the insulating layer 4 and the insulating thermal insulation jacket 5 are connected, eliminating the thermal bridge effect, and ensuring temperature uniformity. The insulating foam thermal insulation material blocks water vapor penetration and prevents condensed water from corroding the metal surface of the pipeline.

[0031] In some optional embodiments, the insulating foam material is any one of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, foam glass, foam cement, aerogel felt, melamine foam and bio-based foam material.

[0032] Specifically, polyurethane foam has good stability at low temperatures, remains elastic at -196°C, has a closed-cell rate of >90%, and is waterproof and condensation-proof. Polyethylene foam is resistant to low-temperature impact, has good flexibility, and is suitable for dynamically bent pipes. Phenolic foam has a temperature resistance of over 200°C, a fire rating of Class A, and produces low smoke and is non-toxic when burned. Foam glass is resistant to high temperatures of 400°C, is non-flammable, and resistant to chemical corrosion, making it suitable for extreme environments. The thermal conductivity of aerogel felt is as low as 0.015W / m·K, and it has both high temperature resistance of 650°C and ultra-thin characteristics, saving space. Melamine foam is flame retardant B1, has sound absorption and noise reduction, and is recyclable. Bio-based foaming materials, such as corn starch, are degradable, low-carbon and environmentally friendly.

[0033] In some optional embodiments, the sleeve 21 includes a variable diameter segment protective sleeve 212 and a constant diameter segment protective sleeve 213 . The variable diameter segment protective sleeve 212 has an increasing diameter in its own axial direction, and the maximum diameter of the variable diameter segment protective sleeve 212 is the same as the diameter of the constant diameter segment protective sleeve 213 .

[0034] Furthermore, the diameter of the variable diameter segment protective sleeve 212 in its own axial direction becomes larger and larger. The end with a smaller diameter of the variable diameter segment protective sleeve 212 is connected to the flange 1, and the larger diameter end of the variable diameter segment protective sleeve 212 is connected to the constant diameter segment protective sleeve 213. The smooth diameter change of the variable diameter segment protective sleeve 212 can disperse the stress caused by thermal expansion and contraction or mechanical vibration, avoid cracks at the connection between the flange 1 and the protective sleeve, and compared with the right-angle variable diameter structure, the fatigue life is increased by more than 30%. The variable diameter design of the variable diameter segment protective sleeve 212 allows the thickness of the foam material of the insulation layer 4 to change synchronously and gradually, preventing the insulation layer from cracking due to sudden changes in thickness. The large end diameter of the variable diameter segment protective sleeve 212 is consistent with the diameter of the constant diameter segment protective sleeve 213, forming a natural assembly reference, which is convenient for the rapid positioning and installation of the flange 1 or the internal heating tape duct 6, and reduces the manual adjustment time.

[0035] In some optional embodiments, the mounting holes 211 are disposed on the variable-diameter segment protective cover 212 , and a plurality of mounting holes 211 are evenly disposed in the circumferential direction of the variable-diameter segment protective cover 212 .

[0036] Specifically, multiple mounting holes 211 are evenly distributed along the circumference of the variable diameter segment protective cover 212, so that the internal heating cable conduit 6 can symmetrically surround the flow pipe 3 to eliminate local low temperature points. The even arrangement of the mounting holes 211 avoids the local strength weakening of the variable diameter segment protective cover 212 due to the openings.

[0037] In some optional embodiments, the surface of the reducing segment protective cover 212 surrounding the mounting hole 211 is provided with threads, the end of the fixing seat 22 docking with the mounting hole 211 is provided with threads, and the fixing seat 22 and the mounting hole 211 are threadedly connected; or, the reducing segment protective cover 212 is located on the peripheral side of the mounting hole 211 and is welded to the fixing seat 22.

[0038] Furthermore, the surface of the fixing seat 22 surrounding the through hole 221 is provided with threads, and the external heating tape protection tube 7 is threadedly connected to the fixing seat 22, so as to realize the connection of the internal heating tape conduit 6 between any two adjacent insulating and heat-insulating pipes, realize the continuity of the internal heating tape conduit 6 in the entire ship pipeline, and is relatively convenient to remove and simple to maintain later. The insulating and heat-insulating jacket 5 is used to protect the thermal insulation layer 4.

[0039] In some optional embodiments, the fixing seat 22 is a cylindrical fixing sleeve, and the cylindrical fixing sleeve has a through hole 221 that passes through the sleeve in its own axial direction. One end of the cylindrical fixing sleeve is arranged on the sleeve body 21, and the other end is inclined toward the direction of the flange 1. The angle between the central axis of the cylindrical fixing sleeve and the central axis of the sleeve body 21 ranges from 30° to 80°.

[0040] Specifically, the diameter of the variable diameter segment protective cover 212 gradually increases, resulting in different heat dissipation rates at different positions, with faster heat dissipation at the small end and slower heat dissipation at the large end. The inclined fixing seat 22 can make the internal heating belt duct 6 closer to the end with a smaller diameter of the variable diameter segment protective cover 212. The end with a smaller diameter of the variable diameter segment protective cover 212 is a high heat dissipation area, which enhances local heating and avoids the formation of low temperature points. When the internal heating belt duct 6 is heated, expanded, contracted, or vibrated, the inclined fixing seat 22 can disperse stress and avoid root fracture. The inclination angle enhances the shear resistance of the fixing seat 22.

[0041] On the other hand, the present application provides a preheating insulation pipe, which is the preheating insulation pipe mentioned in any of the above items.

[0042] Specifically, the preheating insulating and heat-preserving pipe includes a flange 1, an insulating protective sleeve 2, a circulation pipeline 3, an insulating layer 4, an insulating and heat-preserving jacket 5, an internal heating tape duct 6 and an external heating tape protective pipe 7. The insulating protective sleeve 2 has a containing space inside, and the two axial ends of the circulation pipeline 3 respectively pass through the insulating protective sleeve 2 and dock with the flange 1. Any two adjacent preheating insulating and heat-preserving pipes are fixedly connected through the adjacent flanges 1. One end of the insulating protective sleeve 2 docks with the flange 1, thereby fixing the insulating protective sleeve 2 to the flange 1. The insulating layer 4 is arranged between the insulating protective sleeve 2 and the circulation pipeline 3. The insulating and heat-preserving jacket 5 wraps the circulation pipeline 3 located outside the insulating protective sleeve 2. The insulating layer 4 and the insulating and heat-preserving jacket 5 are used to insulate and heat the circulation pipeline 3 to ensure temperature stability throughout the process. The insulating protective sleeve 2 includes a sleeve-shaped body 21 and a fixing seat 22. The wall forming the sleeve-shaped body 21 has at least one mounting hole 211. The mounting hole 211 and the containing space The fixing seat 22 has a through hole 221 connected to the mounting hole 211, and the internal heating tape duct 6 passes through the insulating thermal insulation jacket 5 and the insulating layer 4 and is connected to the fixing seat 22 of the insulating protective sleeve 2 to avoid direct exposure to the external environment and reduce the risk of mechanical damage or corrosion. The number of the fixing seats 22 is less than or equal to the number of the mounting holes 211, and the fixing seats 22 and the mounting holes 211 are arranged in a one-to-one correspondence, allowing for flexible configuration of the position of the internal heating tape duct 6. The external heating tape protection tube 7 is connected to the fixing seats 22 of any two adjacent preheating insulating thermal insulation pipes for connection, thereby realizing the connection of the internal heating tape duct 6 between the two adjacent insulating thermal insulation pipes, realizing the continuity of the internal heating tape duct 6 in the entire ship pipeline, being convenient to dismantle, and being simple to maintain in the later stage.

[0043] On the other hand, the present application provides an insulating protective cover 2, which is the insulating protective cover 2 mentioned in any one of the above items.

[0044] Specifically, the preheating insulating and thermal insulation pipe includes a circulation pipe 3, a flange 1, an internal heating tape duct 6, an insulating protective sleeve 2, an insulating layer 4 and an insulating and thermal insulation jacket 5. The two axial ends of the circulation pipe 3 respectively pass through the insulating protective sleeve 2 and are connected to the flange 1. One end of the insulating protective sleeve 2 is connected to the flange 1. The insulating layer 4 is arranged between the insulating protective sleeve 2 and the circulation pipe 3. The circulation pipe 3 is located outside the insulating protective sleeve 2 and is wrapped with the insulating and thermal insulation jacket 5. The insulating protective sleeve 2 includes: a sleeve-shaped body 21, which has a accommodating space inside. The wall forming the sleeve-shaped body 21 has at least one mounting hole 211, and the mounting hole 211 is connected to the accommodating space; a fixing seat 22, which has a through hole 221, which is connected to the mounting hole 211, and the through hole 221 is connected to the mounting hole 211. The number of the fixing seats 22 is less than or equal to the number of the mounting holes 211, and the fixing seats 22 and the mounting holes 211 are arranged one by one.

[0045] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A ship piping system, characterized in that: It comprises a plurality of preheating insulation and heat preservation pipes, each of which is provided with flanges (1) at both ends of the axial direction, and any two adjacent preheating insulation and heat preservation pipes are connected via the flanges (1), and each of the preheating insulation and heat preservation pipes comprises: An insulating protective sleeve (2), one end of which is butted against the flange (1), and has a receiving space inside, including a fixing seat (22); The circulation pipeline (3) has two axial ends that respectively penetrate the insulating protective sleeve (2) and are butt-jointed with the flange (1); A heat-insulating layer (4) is disposed between the insulating protective sleeve (2) and the circulation pipe (3); An insulating and heat-insulating outer jacket (5) wrapping the area of ​​the circulation pipe (3) located outside the insulating protective jacket (2); An internal heating tape conduit (6) passes through the insulating thermal insulation jacket (5) and the thermal insulation layer (4) and is connected to the fixing seat (22) of the insulating protective sleeve (2); The external heating tape protection pipe (7) is connected to the fixing seats (22) of any two adjacent preheating insulation pipes.

2. The ship piping system according to claim 1, characterized in that: The thickness of the insulating heat-insulating outer jacket (5) is greater than the thickness of the heat-insulating layer (4), and the insulating heat-insulating outer jacket (5) at least covers a portion of the insulating protective jacket (2) close to itself.

3. The ship piping system according to claim 2, characterized in that: The material between the thermal insulation layer (4) and the insulating thermal insulation jacket (5) is an insulating foam thermal insulation material, and the insulating foam thermal insulation material is any one of polyurethane foam, polystyrene foam, phenolic foam, polyethylene foam, foam glass, foam cement, aerogel felt, melamine foam and bio-based foam material.

4. The ship piping system according to claim 1, characterized in that: The insulating protective sleeve (2) further comprises a sleeve-shaped body (21), the sleeve-shaped body (21) has an accommodation space inside, the wall forming the sleeve-shaped body (21) has at least one mounting hole (211), the mounting hole (211) is connected to the accommodation space, the fixing seat (22) has a through hole (221) connected to the mounting hole (211), the through hole (221) is connected to the mounting hole (211), the number of the fixing seats (22) is less than or equal to the number of the mounting holes (211), and the fixing seats (22) and the mounting holes (211) are arranged in a one-to-one correspondence.

5. The ship piping system according to claim 4, characterized in that: The sleeve-shaped body (21) comprises a variable diameter segment protection sleeve (212) and a constant diameter segment protection sleeve (213); the diameter of the variable diameter segment protection sleeve (212) in its own axial direction increases, and the maximum diameter of the variable diameter segment protection sleeve (212) is the same as the diameter of the constant diameter segment protection sleeve (213).

6. The ship piping system according to claim 5, characterized in that: The mounting holes (211) are arranged on the diameter-changing segment protective sleeve (212), and a plurality of the mounting holes (211) are evenly arranged in the circumferential direction of the diameter-changing segment protective sleeve (212).

7. The ship piping system according to claim 6, characterized in that: The surface of the reducing segment protective sleeve (212) surrounding the mounting hole (211) is provided with threads, the end of the fixing seat (22) butting against the mounting hole (211) is provided with threads, and the fixing seat (22) and the mounting hole (211) are threadedly connected; or, the reducing segment protective sleeve (212) is located on the peripheral side of the mounting hole (211) and is welded to the fixing seat (22).

8. The ship piping system according to claim 7, characterized in that: The fixing seat (22) is a cylindrical fixing sleeve, the cylindrical fixing sleeve has the through hole penetrating the sleeve in its axial direction, one end of the cylindrical fixing sleeve is arranged on the sleeve-shaped body (21), and the other end is inclined toward the direction of the flange (1), and the angle between the central axis of the cylindrical fixing sleeve and the central axis of the sleeve-shaped body (21) is in the range of 30° to 80°.

9. A preheating insulation pipe, characterized in that: The preheating insulation pipe according to any one of claims 1 to 8.

10. An insulating protective cover, characterized in that: The insulating protective cover (2) according to any one of claims 1 to 8.

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