CN112901866B

CN112901866B - Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose

Info

Publication number: CN112901866B
Application number: CN202110136932.9A
Authority: CN
Inventors: 陈严飞; 张晔; 董绍华; 何明畅; 阎宇峰; 宗优; 刘昊
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-11-16
Anticipated expiration: 2041-02-01
Also published as: CN112901866A

Abstract

The invention relates to a profiled bar, a compression-resistant armor layer and a flexible hose for a marine non-bonded composite flexible hose, wherein the profiled bar comprises a steel belt with a GF-shaped cross section, and the steel belt comprises a first vertical arm, a first cross arm, a second vertical arm, a second cross arm, a third vertical arm, a third cross arm, a fourth vertical arm and a fourth cross arm which are sequentially connected into a whole; the pressure-resistant armor layer is formed by winding and interlocking a plurality of the profiled bars; the flexible hose comprises a framework layer, a lining layer, a pressure-resistant armor layer, a first wear-resistant layer, a first tensile armor layer, a second wear-resistant layer, a second tensile armor layer, an anti-twisting layer and an outer covering layer which are sequentially arranged from inside to outside. The profiled bars are connected in a winding and interlocking manner, so that the slippage between adjacent steel belts of the compression-resistant armor layer can be effectively prevented, a gap between the interlocking structures allows relative sliding, the marine composite flexible hose is ensured to have good flexibility, the internal pressure load is resisted by dynamic movement deformation, and the marine composite flexible hose is suitable for a severe marine environment in deep sea.

Description

Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose

Technical Field

The invention relates to a marine composite flexible hose, in particular to a profiled bar and a compression-resistant armor layer for a marine non-bonded composite flexible hose, and belongs to the technical field of marine oil and gas resource transportation.

Background

Along with the continuous exploration and development of onshore oil and gas fields, the onshore oil and gas yield is continuously reduced, and the abundant marine oil and gas resources gradually arouse the attention of people. Valid data show that the world ocean oil and gas resources account for one third of the total oil, while the ocean oil resources, which are not yet explored, account for 70% of the total oil resources. A large amount of marine oil and gas resources are still asleep, and people are urgently waiting for development and utilization.

The marine pipeline is one of the most important tools in marine oil and gas resource transportation, and can be roughly divided into two categories, namely a steel pipe and a composite flexible pipeline. In recent years, the marine non-bonding composite flexible hose started to be made up abroad has better flexibility and adaptability than a steel pipe due to the advantages of softness, environmental protection, recoverability, convenient installation, corrosion resistance, high pressure resistance, special structure with independent layers and relative movement, long service life, low maintenance cost and the like, and becomes a necessary pipeline for marine development, particularly deep sea development.

At present, the non-bonding composite flexible hose is widely applied to the ocean flexible pipeline market, and the prospect is very wide. The non-bonding composite flexible hose mainly comprises a framework layer, an inner liner layer, a compression-resistant armor layer, a wear-resistant layer, a tensile armor layer and an outer cladding layer from inside to outside, and sometimes structural aids such as an insulating layer and an insulating layer are added according to different functional requirements and sea conditions. The pressure-resistant armor layer is used as an important metal layer, mainly resists the internal pressure load of a transmission medium in the pipeline, simultaneously resists partial hydrostatic external pressure load, and does not have remarkable capacity of bearing axial load and bending. The pressure-resistant armor layer is formed by winding a steel belt with metal interlocking special-shaped thickness of 4-12 mm and a pipe body axis at a spiral angle of 88-90 degrees, and provides radial rigidity for a pipeline. Due to the asymmetry of the cross section profile of the pressure-resistant armor layer, a common failure mode is unlocking, metal surfaces in the armor layer are in direct contact and move relatively, abrasion failure often occurs, and fatigue fracture can occur when the pipeline moves dynamically to cause large load change.

Disclosure of Invention

In view of the above problems, it is an object of the present invention to provide a profiled bar for marine non-bonded composite flexible hose, which is connected by winding interlocking, wherein a gap is formed between the interlocking structures to allow relative movement, so as to ensure good flexibility of the composite hose, and is not easy to unlock, and resists internal pressure load by dynamic movement deformation; another purpose of the invention is to provide a pressure-resistant armor layer structure formed by winding and interlocking a plurality of the profiled bars; it is a third object of the present invention to provide a marine unbonded composite flexible hose comprising the above compressive armour layer.

In order to achieve the purpose, the invention adopts the following technical scheme: a profiled bar for marine non-bonded composite flexible hoses comprises a steel belt with a GF-shaped cross section, wherein the steel belt comprises a first vertical arm, a first cross arm, a second vertical arm, a second cross arm, a third vertical arm, a third cross arm, a fourth vertical arm and a fourth cross arm which are sequentially connected into a whole;

wherein the third cross arm and the fourth cross arm are equal in lateral length and longitudinal width, the third vertical arm and the fourth vertical arm are equal in lateral width and inner surface longitudinal length, and the longitudinal length of the inner surface of the third vertical arm is slightly greater than the longitudinal width of the fourth cross arm; the transverse widths of the second vertical arm and the third vertical arm are equal; the transverse width of the second vertical arm is equal to the longitudinal width of the first cross arm;

the inner surface of the first vertical arm forms a slope with an inclination, the transverse width of the first vertical arm at the lowest point of the slope is equal to that of the second vertical arm, and the transverse width of the first vertical arm at the lowest point of the slope is defined as the transverse width of the first vertical arm; the transverse width of the first vertical arm at the highest point of the slope is about 0.8 times the transverse width of the first vertical arm;

the transverse length of the second cross arm is about 2.6 times the transverse length of the first cross arm, the transverse length of the second cross arm is about 9.5 times the transverse width of the third vertical arm, and the transverse length of the second cross arm is about 3 times the transverse length of the third cross arm;

the longitudinal width of the second cross arm is about 2 times that of the third cross arm, the longitudinal width of the first cross arm is about 1.2 times that of the third cross arm, the transverse width of the first vertical arm is slightly greater than that of the third cross arm, and the longitudinal length of the first vertical arm is about 2.2 times that of the first cross arm;

the upper surfaces of the second cross arm, the third cross arm, the first cross arm and the fourth cross arm are distributed from high to low in the vertical direction and are parallel to each other, the lower surfaces of the second cross arm, the third cross arm and the fourth cross arm are distributed from high to low in the vertical direction and are parallel to each other, and the lower surfaces of the first cross arm and the fourth cross arm are at the same vertical height.

In the profile, preferably, the inner connection point and the outer connection point of the first vertical arm and the first cross arm, the inner connection point of the first cross arm and the second vertical arm, the inner connection point of the second vertical arm and the second cross arm, the inner connection point of the second cross arm and the third vertical arm, the inner connection point of the third vertical arm and the third cross arm, the inner connection point of the third cross arm and the fourth vertical arm, and the inner connection point of the fourth vertical arm and the fourth cross arm all adopt rounded transitions with the same radius.

Preferably, the outer joints of the first cross arm and the second vertical arm, the outer joints of the second vertical arm and the second cross arm, the outer joints of the second cross arm and the third vertical arm, and the outer joints of the fourth vertical arm and the fourth cross arm all adopt rounded corner transitions with the same radius.

Preferably, the two corner edges of the first vertical arm, the two corner edges of the third transverse arm and the two corner edges of the fourth transverse arm are all rounded with the same radius.

Preferably, the profiled bar is provided with a first wear-resistant gasket, a second wear-resistant gasket and a third wear-resistant gasket at the arc tops of the first vertical arm, the third cross arm and the fourth cross arm respectively, the first wear-resistant gasket, the second wear-resistant gasket and the third wear-resistant gasket are mutually embedded with the steel strip through three grooves respectively, and the first wear-resistant gasket, the second wear-resistant gasket and the third wear-resistant gasket are provided with a concentric elliptical arc outer surface and a concentric circular arc inner surface.

The profiled bar is characterized in that preferably, half of the length of the minor axis of the elliptic arc of the first wear-resistant gasket and the second wear-resistant gasket is equal to the length of the radius of the circular arc, and the length of the major axis of the elliptic arc is about 2 times of the length of the minor axis; meanwhile, the longitudinal width of the first wear-resistant gasket is about 0.25 times of the longitudinal width of the first cross arm, the transverse width of the second wear-resistant gasket is about 0.25 times of the transverse width of the third vertical arm, and the third wear-resistant gasket is identical to the second wear-resistant gasket.

Preferably, the first wear-resistant pad, the second wear-resistant pad and the third wear-resistant pad are all made of wear-resistant polymer materials.

A compression-resistant armor layer is formed by winding and interlocking a plurality of profiles, namely a first vertical arm of a first steel strip and a first vertical arm of a second steel strip are buckled with each other, a fourth cross arm of the first steel strip is inserted between a second cross arm and a third cross arm of a third steel strip, the third cross arm of the first steel strip is inserted between the third cross arm and the fourth cross arm of the third steel strip, and the like to form a winding and interlocking structure.

The utility model provides a compound flexible hose of ocean non-bonding, includes framework layer, inner liner, resistance to compression armor, first wearing layer, first tensile armor, second wearing layer, the second is resisted and is drawn armor, anti-twist layer and outer cladding that from interior to exterior set gradually, the resistance to compression armor adopts above-mentioned resistance to compression armor.

The marine non-bonded composite flexible hose is characterized in that preferably, one side of the pressure-resistant armor layer, which is close to the inner liner, is provided with a groove, and the groove and the outer surface of the joint device are correspondingly raised, so that the inner liners are mutually embedded.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. the cross section of the profiled bar provided by the invention is GF-shaped, and the profiled bar can be wound and interlocked, so that the composite hose is ensured to have good flexibility, and the profiled bar can be effectively prevented from sliding out.

2. The space allowance of the profiles of the invention, due to the gaps existing between the mutually meshed sections, allows the adjacent sections of the profiles to move relatively in a certain space for certain flexibility.

3. The section of the pressure-resistant armor layer provided by the invention is formed by interlocking and winding GF-shaped profiled bars outside the lining layer, and the winding angle is close to 90 degrees, so that the helically wound profiled bars can effectively resist the internal pressure.

4. In the invention, the arc angle over-design is carried out at the connecting part of the steel belt grooves of the profiled bar so as to prevent the stress of the metal tip caused by stress concentration and steel belt creep.

5. According to the invention, the traditional metal-metal contact of the mutually buckled contact surfaces is changed into the polymer-metal contact, so that the fatigue fracture failure caused by fretting wear caused by the metal-metal contact can be effectively improved, the service life of the pressure-resistant armor layer is prolonged, and the pressure-resistant armor layer is suitable for the severe marine environment in deep sea.

Drawings

Fig. 1 is a schematic cross-sectional view of a profiled bar according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a compression resistant armor construction according to an embodiment of the invention;

FIG. 3 is a schematic structural view of a marine unbonded composite flexible hose according to an embodiment of the invention;

figure 4 is a schematic cross-sectional view of an improved compressive armor at a joint according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "lateral," "vertical," "transverse," "longitudinal," and the like refer to an orientation or a positional relationship based on that shown in the drawings, which is merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the profiled bar for the marine non-bonded composite flexible hose provided by the present embodiment includes a steel strip 46 having a GF-shaped cross section, and the steel strip 46 includes a first vertical arm 10, a first horizontal arm 12, a second vertical arm 14, a second horizontal arm 16, a third vertical arm 18, a third horizontal arm 22, a fourth vertical arm 19 and a fourth horizontal arm 21, which are sequentially connected as a whole.

Wherein the third crossbar 22 and the fourth crossbar 21 are equal in transverse length and longitudinal width, the third vertical arm 18 and the fourth vertical arm 19 are equal in transverse width and longitudinal length of the inner surface, and the longitudinal length of the inner surface of the third vertical arm 18 is slightly greater than the longitudinal width of the fourth crossbar 21; the second upright arm 14 and the third upright arm 18 are equal in lateral width; the transverse width of the second vertical arm 14 is equal to the longitudinal width of the first transverse arm 12.

The inner surface of the first vertical arm 10 forms a slope 45 having an inclination, the lateral width of the first vertical arm 10 at the lowest point of the slope 45 is equal to the lateral width of the second vertical arm 14, and the lateral width of the first vertical arm 10 at the lowest point of the slope 45 is defined as the lateral width of the first vertical arm 10; the transverse width of the first upright arm 10 at the highest point of the ramp 45 is about 0.8 times the transverse width of the first upright arm 10.

The transverse length of the second crossbar 16 is about 2.6 times the transverse length of the first crossbar 12, the transverse length of the second crossbar 16 is about 9.5 times the transverse width of the third vertical arm 14, and the transverse length of the second crossbar 16 is about 3 times the transverse length of the third crossbar 22.

The longitudinal width of the second cross arm 16 is about 2 times the longitudinal width of the third cross arm 22, the longitudinal width of the first cross arm 12 is about 1.2 times the longitudinal width of the third cross arm 22, the transverse width of the first vertical arm 10 is slightly greater than the longitudinal width of the third cross arm 22, and the longitudinal length of the first vertical arm 10 is about 2.2 times the longitudinal width of the first cross arm 12.

The upper surfaces of the second, third, first and

fourth crossbars

16, 22, 12 and 21 are distributed from high to low and parallel to each other in the vertical direction, the lower surfaces of the second, third and

fourth crossbars

16, 22 and 21 are distributed from high to low and parallel to each other in the vertical direction, and the lower surfaces of the first and

fourth crossbars

12 and 21 are at the same vertical level.

In the above embodiment, it is preferable that the inner connection 28 and the outer connection 11 of the first vertical arm 10 and the first horizontal arm 12, the inner connection 29 of the first horizontal arm 12 and the second vertical arm 14, the inner connection 30 of the second vertical arm 14 and the second horizontal arm 16, the inner connection 31 of the second horizontal arm 16 and the third vertical arm 18, the inner connection 32 of the third vertical arm 18 and the third horizontal arm 22, the inner connection 35 of the third horizontal arm 22 and the fourth vertical arm 19, and the inner connection 36 between the fourth vertical arm 19 and the fourth horizontal arm 21 are rounded transitions with the same radius.

In the above embodiment, it is preferable that the outer junction 13 between the first horizontal arm 12 and the second vertical arm 14, the outer junction 15 between the second vertical arm 14 and the second horizontal arm 16, the outer junction 17 between the second horizontal arm 16 and the third vertical arm 18, and the outer junction 20 between the fourth vertical arm 19 and the fourth horizontal arm 21 are rounded off at the same radius.

In the above embodiment, the

corner edges

26 and 27 of the first vertical arm 10, the

corner edges

33 and 34 of the third cross arm 22 and the

corner edges

37 and 38 of the fourth cross arm 21 are preferably rounded off with the same radius.

In the above embodiment, preferably, the first wear-resistant pad 25, the second wear-resistant pad 23 and the third wear-resistant pad 24 are respectively disposed at the arc tops of the first vertical arm 10, the third horizontal arm 22 and the fourth horizontal arm 21, the first wear-resistant pad 25, the second wear-resistant pad 23 and the third wear-resistant pad 24 are respectively embedded with the steel strip 46 through the

grooves

43, 39 and 41, and the first wear-resistant pad 25, the second wear-resistant pad 23 and the third wear-resistant pad 24 each have an outer surface of an elliptical arc and an inner surface of an arc which share a common central point. Further, the materials of the first wear-resistant pad 25, the second wear-resistant pad 23 and the third wear-resistant pad 24 are all wear-resistant polymer materials.

In the above embodiment, preferably, the minor axis length of the elliptical arc of the first wear-resistant pad 25 and the second wear-resistant pad 23 is the same as the radius length of the circular arc, and the major axis length of the elliptical arc is about 2 times the minor axis length; meanwhile, the longitudinal width of the first wear-resistant pad 25 is about 0.25 times of the longitudinal width of the first cross arm 12, the transverse width of the second wear-resistant pad 23 is about 0.25 times of the transverse width of the third vertical arm 18, and the third wear-resistant pad 24 is identical to the second wear-resistant pad 23.

As shown in fig. 2, based on the profiles provided by the above example, the invention also provides a pressure-resistant armor layer for the marine non-bonded composite flexible hose, which is formed by winding and interlocking a plurality of profiles, that is, a first vertical arm 10 of a steel strip 46 and a first vertical arm 10 of another steel strip 47 are buckled with each other, a fourth cross arm 21 of the steel strip 46 is inserted between a second cross arm 16 and a third cross arm 22 of the steel strip 48, the third cross arm 22 of the steel strip 46 is inserted between the third cross arm 22 and the fourth cross arm 21 of the steel strip 48, and the like to form a winding and interlocking structure.

In the above example, preferably, when the steel strip 46 is inserted into the steel strip 47, since the spacing between the first and second vertical arms 10 and 14 of the steel strip 46 is greater than the lateral width of the first vertical arm 10, and the sum of the longitudinal length of the first vertical arm 10 of the steel strip 46 (including the longitudinal width of the first wear-resistant shim 25) and the longitudinal width of the first cross arm 12 is smaller than the sum of the longitudinal lengths of the third and fourth vertical arms 18 and 19 and the longitudinal widths of the third and fourth cross arms 22 and 21, and 2 times the longitudinal length of the first vertical arm 10 of the steel strip 46 (including the longitudinal width of the first wear-resistant shim 25) is greater than the sum of the longitudinal lengths of the third and fourth vertical arms 18 and 19 and the longitudinal widths of the third and fourth cross arms 22 and 21, the steel strip 46 and 47 can be engaged with each other; in the limit, the third cross arm 22 and the fourth cross arm 21 of the steel strip 46 and the steel strip 48 are in close contact, and the first vertical arm 10 of the steel strip 46 and the first vertical arm 10 of the steel strip 47 can still be buckled with each other, so that the space allowance is reserved to ensure that the anti-compression armor layer keeps good flexibility.

In the above example, preferably, when the steel strip 46 is inserted into the steel strip 48, the steel strip 46 and the steel strip 48 may be engaged with each other since the longitudinal length of the inner surface of the third vertical arm 18 is slightly greater than the longitudinal width of the fourth horizontal arm 21. In the extreme case, when the second upright arm of steel strip 46 abuts the outer surface of the first upright arm 10 of steel strip 47, there is no slippage between steel strip 46 and steel strip 48 because the difference between the sum of the transverse length of the first cross arm 12 and the transverse width of the second upright arm 14, the transverse length of the fourth cross arm 21 (including the longitudinal width of the third wear pad 24), and the transverse width of the third cross arm 18, and the transverse length of the second cross arm 16 is about half the transverse width of the third upright arm 18.

In the above example, preferably, the interlocking structures between the steel belts of the pressure-resistant armor layer are contacted with each other in the vertical direction due to the pressure difference between the inside and the outside of the marine non-bonded composite flexible hose, so that the abrasion damage caused by the metal-metal contact can be effectively improved by the contact of the first wear-resistant gasket 25 and the metal; in addition, when the hose is subjected to dynamic loads such as tensile force, bending moment and the like, the axial tensile force generated enables the interlocking structures between the steel belts of the compression-resistant armor layer to be in mutual contact in the horizontal direction, and the abrasion damage generated by the metal-metal contact can be effectively improved through the contact between the second wear-resistant gasket 23 and the third wear-resistant gasket 24 and the metal. Therefore, the adjacent sections of the pressure-resistant armor layers formed by the profiled bars can ensure certain flexibility of the hose, allow the marine non-bonded composite flexible hose to move relatively in a certain space and prevent the marine non-bonded composite flexible hose from slipping and unlocking easily, and can effectively improve and prevent the pressure-resistant armor layers from being broken due to fatigue and fretting wear.

As shown in fig. 3, based on the compressive armor layers provided by the above embodiments, the invention also provides a marine non-bonded composite flexible hose, which comprises a framework layer 1, an inner liner layer 2, an interlocked and wound compressive armor layer 3, a first wear-resistant layer 4, a first tensile armor layer 5, a second wear-resistant layer 6, a second tensile armor layer 7, an anti-twisting layer 8 and an outer covering layer 9 in sequence from inside to outside.

The framework layer 1 is used for resisting external pressure load, providing enough radial rigidity for supporting the lining pipe and preventing external pressure from crushing; the inner liner 2 forms a sealing layer for transporting fluid, preventing leakage of the internal fluid; the interlocked and wound compression-resistant armor layer 3 bears the internal pressure and partial external pressure of the pipe body; the first wear-resistant layer 4 and the second wear-resistant layer 6 can prevent contact abrasion between the metal layers; the first tensile armor layer 5 and the second tensile armor layer 7 are used for bearing axial tension; the anti-distortion layer 8 is used for preventing the tensile armor layer from being birdcaged; the outer cladding 9 is resistant to mechanical damage and prevents sea water corrosion and damage by marine organisms and ships.

In the above example, preferably, as shown in fig. 4, an arc-shaped groove is processed in the middle of the steel belt 46 on the side of the pressure-resistant armor layer 3 adjacent to the inner liner 2, the joint of the arc-shaped groove and the outer surface of the steel belt 46 also adopts fillet transition, the arc-shaped groove and the inner liner 2 with corresponding protrusions on the outer surface in the joint device are mutually embedded, and the function of assisting to fix the inner liner 2 in the joint device of the flexible hose is performed.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A profiled bar for marine non-bonded composite flexible hoses, characterized in that the profiled bar comprises a steel strip (46) with GF-shaped cross section, wherein the steel strip (46) comprises a first vertical arm (10), a first cross arm (12), a second vertical arm (14), a second cross arm (16), a third vertical arm (18), a third cross arm (22), a fourth vertical arm (19) and a fourth cross arm (21) which are sequentially connected into a whole;

wherein the third crossbar (22) and the fourth crossbar (21) are equal in transverse length and longitudinal width, the third vertical arm (18) and the fourth vertical arm (19) are equal in transverse width and inner surface longitudinal length, the longitudinal length of the inner surface of the third vertical arm (18) is slightly greater than the longitudinal width of the fourth crossbar (21); the transverse widths of the second vertical arm (14) and the third vertical arm (18) are equal; the transverse width of the second vertical arm (14) is equal to the longitudinal width of the first cross arm (12);

the inner surface of the first vertical arm (10) forms a slope (45) with an inclination, the transverse width of the first vertical arm (10) at the lowest point of the slope (45) is equal to that of the second vertical arm (14), and the transverse width of the first vertical arm (10) at the lowest point of the slope (45) is defined as the transverse width of the first vertical arm (10); the transverse width of the first vertical arm (10) at the highest point of the ramp (45) is about 0.8 times the transverse width of the first vertical arm (10);

the transverse length of the second cross arm (16) is about 2.6 times the transverse length of the first cross arm (12), the transverse length of the second cross arm (16) is about 9.5 times the transverse width of the third vertical arm (14), and the transverse length of the second cross arm (16) is about 3 times the transverse length of the third cross arm (22);

the longitudinal width of the second cross arm (16) is about 2 times the longitudinal width of the third cross arm (22), the longitudinal width of the first cross arm (12) is about 1.2 times the longitudinal width of the third cross arm (22), the transverse width of the first vertical arm (10) is slightly greater than the longitudinal width of the third cross arm (22), and the longitudinal length of the first vertical arm (10) is about 2.2 times the longitudinal width of the first cross arm (12);

the upper surfaces of the second cross arm (16), the third cross arm (22), the first cross arm (12) and the fourth cross arm (21) are distributed from high to low in the vertical direction and are parallel to each other, the lower surfaces of the second cross arm (16), the third cross arm (22) and the fourth cross arm (21) are distributed from high to low in the vertical direction and are parallel to each other, and the lower surfaces of the first cross arm (12) and the fourth cross arm (21) are at the same vertical height.

2. Profile according to claim 1, wherein the inner and outer joints (28, 11) of the first vertical arm (10, 12), the inner joints (29) of the first and second horizontal arms (12, 14), the inner joints (30) of the second and second vertical arms (14, 16), the inner joints (31) of the second and third horizontal arms (16, 18), the inner joints (32) of the third and third vertical arms (18, 22), the inner joints (35) of the third and fourth vertical arms (22, 19) and the inner joints (36) between the fourth and fourth vertical arms (19, 21) all use rounded transitions of the same radius.

3. A profile according to claim 1, wherein the outer junctions (13) of the first and second transverse arms (12, 14), the outer junctions (15) of the second and second transverse arms (14, 16), the outer junctions (17) of the second and third transverse arms (16, 18) and the outer junctions (20) between the fourth and fourth transverse arms (19, 21) all transition with rounded corners of the same radius.

4. Profile according to claim 1, wherein the corner edges (26, 27) of the first vertical arms (10), the corner edges (33, 34) of the third transverse arm (22) and the corner edges (37, 38) of the fourth transverse arm (21) all have rounded transitions of the same radius.

5. A profiled bar according to claim 4, characterized in that a first wear pad (25), a second wear pad (23) and a third wear pad (24) are provided at the arc top of the first vertical arm (10), the third transverse arm (22) and the fourth transverse arm (21), respectively, the first wear pad (25), the second wear pad (23) and the third wear pad (24) are mutually fitted with the steel strip (46) through grooves (43, 39, 41), respectively, and the first wear pad (25), the second wear pad (23) and the third wear pad (24) each have a concentric outer surface of an elliptical arc and an inner surface of an arc.

6. A profile according to claim 5, wherein the first wear resistant pad (25) and the second wear resistant pad (23) have a minor half axis length of the elliptical arc which is the same as the radius length of the circular arc, the major axis length of the elliptical arc being about 2 times the minor axis length; meanwhile, the longitudinal width of the first wear-resistant gasket (25) is about 0.25 times of the longitudinal width of the first cross arm (12), the transverse width of the second wear-resistant gasket (23) is about 0.25 times of the transverse width of the third vertical arm (18), and the third wear-resistant gasket (24) is identical to the second wear-resistant gasket (23).

7. A profile according to claim 5, wherein the first wear resistant pad (25), the second wear resistant pad (23) and the third wear resistant pad (24) are all of a wear resistant polymer material.

8. A pressure resistant armour layer formed by a number of profiled bars wound and interlocked according to any of claims 1 to 7, wherein a first vertical arm (10) of a first steel strip is interlocked with a first vertical arm (10) of a second steel strip, a fourth cross arm (21) of the first steel strip is inserted between a second cross arm (16) and a third cross arm (22) of a third steel strip, the third cross arm (22) of the first steel strip is inserted between the third cross arm (22) and the fourth cross arm (21) of the third steel strip, and so on to form a wound and interlocked structure.

9. The marine non-bonding composite flexible hose comprises a framework layer (1), an inner liner layer (2), a compression-resistant armor layer (3), a first wear-resistant layer (4), a first tensile armor layer (5), a second wear-resistant layer (6), a second tensile armor layer (7), an anti-twisting layer (8) and an outer covering layer (9) which are sequentially arranged from inside to outside, and is characterized in that the compression-resistant armor layer (3) adopts the compression-resistant armor layer as claimed in claim 8.

10. Marine non-bonded composite flexible hose according to claim 9, characterised in that the pressure resistant armour layer (3) is provided with a groove on the side close to the inner liner (2), and the groove is mutually embedded with the inner liner (2) with corresponding bulges on the outer surface in the joint means.