CN211010227U - Novel ring rib steel band reinforcing flexible composite pipe - Google Patents

Abstract

The utility model discloses a novel flexible compound pipe of ring rib steel band reinforcing aims at providing an economic efficient medium transport scheme for industrial fields such as land and marine oil gas. The composite pipe mainly comprises a four-layer structure, which is sequentially from inside to outside: the inner layer of the annular rib, the steel strip winding enhancement layer (which can be formed by spirally winding a plurality of layers of steel strips along the axial direction of the inner pipe), the high-strength braided film layer and the outer protection layer. Annular reinforcing ribs (similar to spiral springs) with large winding angles are embedded into the inner layer, so that the annular and radial strength of the pipeline is improved, and the defect of external pressure resistance of the conventional steel belt winding reinforced flexible pipe is overcome; the high-strength woven film is wrapped outside the outermost steel strip reinforcing layer, so that the uncoiling action of the spiral steel strip under the twisting action is prevented. Meanwhile, the braided film can provide a certain supporting effect for the steel belt reinforcing layer when the steel belt reinforcing layer radially expands under the action of axial compression, and the axial compression rigidity of the pipeline is further improved.

Description

Novel ring rib steel band reinforcing flexible composite pipe

Technical Field

The utility model relates to a be applied to the long distance transport composite pipe who presses liquid or gaseous material on land or ocean, especially relate to the steel band reinforcing flexible composite pipe after the improvement.

Background

The existing steel belt reinforced flexible composite pipe is applied to oil and gas transportation on land or shallow sea. Compared with the traditional steel pipe, the steel belt reinforced flexible composite pipe has the characteristics of light weight, corrosion resistance, coilable performance and the like; compared with the traditional non-bonding pipe, the pipe has simple structure and low production cost. But the radial rigidity and the circumferential rigidity of the steel plate are insufficient due to the lack of corresponding armor layers, so that the steel plate cannot be suitable for a deepwater area; while the non-bonded flexible pipe containing the framework layer or the pressure-resistant armor layer can be suitable for a deepwater area, the section form of the non-bonded flexible pipe is complex, the manufacturing process is difficult, and the production cost is high. The utility model aims at providing an it has the economic solution that the medium was carried to be applicable to industrial fields such as land and offshore oil gas to provide one kind. In order to overcome the defects of the prior art, the utility model provides a novel annular rib reinforced flexible composite pipe. The novel flexible composite pipe can enhance the internal and external pressure resistance of the existing steel belt winding reinforced flexible pipe under the condition of reducing the economic cost, and has the advantages of simple manufacturing process and low production cost.

SUMMERY OF THE UTILITY MODEL

For overcoming the deficiencies of the prior art, the utility model provides a novel ring rib steel band reinforcing flexible pipe, the technical scheme who adopts is:

a novel annular rib steel belt reinforced flexible composite pipe comprises a four-layer structure, wherein an inner layer, a steel belt winding reinforcing layer, a woven film layer and an outer protective layer are sequentially arranged from inside to outside. The annular rib inner layer is formed by embedding the annular reinforcing ribs with large winding angles in the inner layer, so that the annular strength and the radial strength of the pipeline are enhanced, and the capability of bearing internal pressure and external pressure of the pipeline is further improved. The steel belt winding reinforcing layer is divided into a basic reinforcing layer and an additional reinforcing layer and is formed by spirally winding a plurality of layers of steel belts along the axial direction of the inner pipe. The woven film layer can reduce lateral buckling of the steel belt and improve axial compression rigidity and torsion capacity of the steel belt. So as to prevent the spiral steel belt from unwinding under the action of torsion and further improve the axial compression rigidity of the pipeline. The steel belt winding enhancement layer is formed by spirally winding a plurality of layers of steel belts along the axial direction of the inner layer, and the steel belts are not bonded with the inner layer and the outer protection layer and can slide; the steel belts are not bonded and can slide.

As a further technical scheme, the inner layer and the outer protective layer are thermoplastic plastic layers, and annular reinforcing ribs are embedded in the inner layer, so that a pressure medium is mainly transmitted, the anti-leakage and anti-corrosion effects are achieved, and a certain external pressure and internal pressure effect is resisted; the outer layer is mainly used for protecting the pipeline structure from being damaged by the external environment; the steel strip-wound reinforcing layer is mainly used for providing the internal pressure resistance and tensile rigidity of the pipeline and balancing the section torque.

As a further technical scheme, a thermal insulation layer can be added to the pipeline with temperature requirement according to the design; in marine applications, to maintain their stability in place, a weight layer, which may be metal or other material, may be added depending on the pipeline design.

As a further technical scheme, the section form of the circumferential reinforced rib can be any form such as a round form, a rectangular form or an I-shaped form, and the section form of the steel belt winding reinforcing layer is a rectangular form or any other form.

As a further technical scheme, the number of the steel strip winding enhancement layers is even, wherein the basic enhancement layer is wound in a positive, negative and reverse mode, namely the front steel strip layer and the rear steel strip layer are wound at the same angle, but in opposite directions. The winding angles and the directions of the first two layers of steel belts are the same, and the second layer of steel belts covers the gap of the first layer of steel belts; the back two layers of steel belts are wound in opposite directions, and the technical scheme is the same as that of the front two layers.

As a further technical scheme, an additional enhancement layer is added outside the basic enhancement layer according to the requirement of the actual working condition. The additional enhancement layer is sequentially wound with the steel belt layers according to a positive and negative winding mode, namely the winding angles of the adjacent steel belts are the same (the winding angles slightly change due to the change of the radius), but the winding directions are opposite, so that the torque balance of the pipe body is realized; meanwhile, torque balance can be realized by adopting the mode that the number of layers of the steel strips in the positive and negative directions is different, but the total thicknesses of the steel strip layers in the positive and negative directions are the same.

As a further technical scheme, if the reinforced fiber belt is applied to land or shallow sea, the inner layer does not need to be embedded with the circumferential reinforced rib, or the section form and the winding angle of the circumferential reinforced rib are modified, and the winding reinforcing layer can be replaced by a light high-strength fiber belt; if the steel strip reinforced pipe is applied to the sea and the hydrostatic pressure is high, the annular reinforced ribs need to be embedded into the inner layer, and the additional reinforced layer in the steel strip wound reinforced layer can be repeatedly added according to the technical scheme or the winding angle and the thickness of the additional reinforced layer are increased until the high-pressure-resistant design of the pipe is met.

As a further technical scheme, the woven film layer can be formed by weaving high-strength wires such as aramid fibers and terylene according to a set structure, and is wrapped on the outermost layer of the steel belt winding enhancement layer. The spiral winding high-strength thin polyester belt can be selected to replace a woven film or a protective layer is added according to the design working condition, so that the gap between the reinforcing layers can be prevented from being filled with the soft outer protective layer material.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an imbed the great steel wire strip of winding angle, line or restraint and form annular to add the muscle rib in the inlayer of the flexible compound pipe of steel band reinforcing, increased the radial and hoop intensity of pipeline to the anti interior external pressure's of pipeline ability has further been improved. Compared with the existing framework layer and the compressive armor layer, the annular reinforcing rib has the advantages of simple manufacturing process, economy and high efficiency. The utility model discloses a winding steel band grouping design, the winding of rational distribution steel band, outer steel band covers inlayer steel band clearance promptly. And each layer of steel strip in the basic enhancement layer is spirally wound along the axial direction of the inner pipe to form a gap, and the adjacent equidirectionally wound steel strips cover the gap. The winding mode for covering the gap is to eliminate the non-pressure bearing performance caused by the winding gap, thereby improving the pressure resistance of the pipeline, simultaneously reducing the stress concentration effect generated in the stress process of the pipeline and facilitating the coiling design of the pipeline. The additional enhancement layer is sequentially wound with the steel belt according to the design requirement in a positive and negative mode, so that the internal and external pressure resistance of the pipeline is improved. The steel belt layers have no bonding characteristic, can slide and have flexibility and earthquake resistance. The steel belt is wound with a woven film on the outer side of the reinforcing layer or a high-strength thin polyester belt in a spiral winding mode, so that the outer protective sleeve of the pipeline is prevented from being cut by the warped steel belt under the stretching action, the steel belt layer is prevented from unwinding under the twisting action, and the pipeline is prevented from lateral buckling under the axial compression action. A protective layer is added between the steel belt layers and is mainly used for preventing the metal layers from being scratched and worn and fatigued. Compared with other non-bonded composite pipes, the utility model has the characteristics of moderate weight, corrosion resistance, strong external pressure resistance, simple process, economy, high efficiency and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a middle ring-shaped ribbed bar of the present invention;

FIG. 3 is a schematic structural view of the inner layer of the middle ring rib of the present invention;

FIG. 4 is a schematic view of a first steel reinforcing layer according to the present invention;

fig. 5 is a schematic structural diagram of the basic enhancement layer in the present invention;

fig. 6 is a schematic structural diagram of an additional enhancement layer in the present invention;

FIG. 7 is a schematic view of a structure of a woven film layer of the present invention;

in the figure: 1. an inner layer; 2. winding a reinforcing layer on the steel belt; 3. an outer protective layer; 4. circumferentially reinforcing ribs; 5. a base enhancement layer; 6. a first layer of steel strip; 7. a second layer of steel strip; 8. a third layer of steel strip; 9. a fourth layer of steel strip; 10. an additional enhancement layer; 11. a fifth layer of steel strip; 12. a sixth layer of steel strip; 13. a thin polyester tape; 14. a gap.

Detailed Description

The present invention will be further explained by the following embodiments with reference to the accompanying drawings:

as shown in the attached drawings 1-7, the novel annular rib steel belt reinforced flexible composite pipe comprises a four-layer structure which comprises an inner layer 1, a steel belt winding reinforcing layer 2, a high-strength thin polyester belt and an outer protective layer 3 from inside to outside in sequence, wherein an annular rib inner layer is formed by embedding annular reinforcing ribs with large winding angles in the inner layer. The inner layer and the outer protective layer are thermoplastic plastic layers, and the steel belt and the annular reinforcing ribs are stainless steel belts or carbon steel belts subjected to surface antiseptic treatment. The inner layer is embedded with a circumferential reinforced rib 4 with a winding angle of 85 degrees, and the section of the rib is circular. The steel band winding enhancement layer is formed by spirally winding six layers of steel bands along the axial direction of the inner tube, the six layers of steel bands have no bonding characteristic with the inner tube and the outer protection tube and can slide, and the multi-layer steel bands have no bonding characteristic and can slide. The basic enhancement layer 5 is composed of the first four layers of steel strips, wherein the first layer of steel strips 6 and the second layer of steel strips 7 are wound in the same direction and at the same winding angle. The third layer of steel belt 8 and the fourth layer of steel belt 9 are wound in the same direction and at the same winding angle. But the winding directions of the first layer of steel belt and the second layer of steel belt are opposite to the winding directions of the third layer of steel belt and the fourth layer of steel belt. The winding angles of the first four layers of steel belts are +54.7 degrees, -54.7 degrees and-54.7 degrees in sequence. The additional reinforcing layer 10 consists of a fifth layer of steel strip 11 and a sixth layer of steel strip 12. The winding angles of the fifth layer of steel strip and the sixth layer of steel strip are the same, but the winding directions are opposite, and the winding angles are +54.7 degrees and-54.7 degrees in sequence. And a high-strength thin polyester belt 13 is spirally wound outside the sixth layer of steel belt. Each layer of steel strip is spirally wound along the axial direction of the inner pipe to form a gap 14, and the adjacent wound steel strips cover the gap. The section of each layer of steel belt is rectangular, and the material parameters are consistent.

The utility model discloses having embedded the hoop that winding angle is 85 in the inlayer of the flexible compound pipe of steel band reinforcing adds the muscle rib, increased the hoop intensity of pipeline, improved the anti interior pressure of pipeline, anti external pressure's ability, remedied the shortcoming that current steel band winding reinforcing non-bonding flexible pipe anti external pressure ability is not enough. The section of the circumferential reinforced rib is circular, and compared with a framework layer and a compression-resistant armor layer, the circumferential reinforced rib has the advantages of simple production process and low economic cost. The utility model discloses absorbed current steel band spiral winding reinforcing method, adopted the alternately reverse winding of multilayer steel band and syntropy winding and cover two kinds of winding methods in clearance and form the compound pipe of continuous reinforcement, this compound pipe is high pressure resistant, and unbonded characteristic between each layer can slide, has pliability and earthquake resistance. And a braided film layer is wrapped outside the steel strip winding enhancement layer, or a high-strength thin polyester strip is spirally wound to prevent the outer layer from being punctured by the warped steel strip, the steel strip layer is uncoiled under the action of torsion and the steel strip layer is laterally buckled under the action of axial compression. Protective layers can be added among the steel belt layers according to requirements, so that the metal layers are prevented from being scratched and worn and fatigued. The steel belt reinforced flexible composite pipe has longer service life in the field of oil and gas on land and sea, and the pipeline can be repeatedly installed, cleaned and utilized in the service life and can be continuously manufactured according to the required length.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (9)

1. The utility model provides a novel flexible compound pipe of ring rib steel band reinforcing, includes four-layer structure, by interior to exterior in proper order: the steel belt winding enhancement layer is formed by spirally winding a plurality of layers of steel belts along the axial direction of the inner layer, and the steel belts are not bonded with the inner layer and the outer protection layer and can slide; the steel belts are not bonded and can slide; the method is characterized in that: the annular rib-adding structure comprises an inner layer structure and an outer layer structure, wherein annular rib-adding ribs are embedded into the inner layer structure to form an annular rib inner layer, and the annular rib-adding ribs are formed by spirally winding steel wires; the outer side of the steel belt winding reinforcing layer is wrapped with a braided film layer.

2. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 1, wherein: the inner layer and the outer protective layer are thermoplastic plastic layers.

3. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 1, wherein: the steel belt and the annular reinforcing ribs are stainless steel belts or carbon steel belts subjected to surface anti-corrosion treatment.

4. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 1, wherein: the woven film layer is formed by arranging and combining aramid fibers according to a design angle.

5. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 1, wherein: the inner layer is embedded with circumferential reinforcing ribs, and the winding angle of the circumferential reinforcing ribs ranges from 70 degrees to 90 degrees.

6. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 1, wherein: the steel belt winding reinforcing layer comprises a base reinforcing layer and an additional reinforcing layer, and the steel belt has no bonding characteristic with the inner layer and the outer protective layer and can slide; the bonding characteristics such as welding or restriction do not exist among the layers in the steel belt winding reinforcing layer, and the steel belt can relatively slide.

7. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 6, wherein: the steel belt winding enhancement layers are even layers, the front four layers of steel belts are used as a basic enhancement layer, the winding angles of the front two layers of steel belts and the rear two layers of steel belts are the same, but the winding directions are opposite.

8. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 6, wherein: each layer of steel belt in the multiple layers of steel belts of the steel belt winding enhancement layer is formed by continuously winding a plurality of steel belts in parallel along the axial direction of the inner layer to form a certain gap, and the adjacent steel belts wound in the same direction in the basic enhancement layer cover the gap.

9. The novel annular rib steel strip reinforced flexible composite pipe as claimed in claim 6, wherein: and an additional reinforcing layer is added outside the basic reinforcing layer according to the actual working condition requirement, and the winding angles of adjacent steel belt layers in the additional reinforcing layer are the same but the winding directions are opposite.

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