A sea surface floating oil pipeline skeleton canvas and a preparation method thereof

Abstract

The application discloses a kind of sea surface floating oil pipeline skeleton cord fabric and preparation method thereof, belong to sea surface floating oil pipeline manufacturing technical field, the skeleton cord fabric, it is characterized in that: it is woven with carbon thread as warp thread, with carbon fiber thread as weft thread, the warp thread is single-thread line without need to add twist.Warp density is 32-40 root / 10cm, weft density is 16-20 root / 10cm.Carbon thread is wrapped with 0.1-0.3mm thick rubber layer.The tensile strength of the 10cm wide skeleton cord fabric is greater than 200MPa, and the elongation is 14% of the breaking elongation.The present application uses single-thread thick carbon thread as warp thread, disperses the force borne by traditional single thick steel wire skeleton to each carbon thread, has the characteristics of good flexibility, small stress, high tensile strength and strong carrying capacity, can replace steel wire skeleton, to solve the problem that steel wire is used as skeleton stress is large and relatively concentrated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil pipeline manufacturing, in particular to a sea floating oil pipeline framework cord fabric and a preparation method thereof. BACKGROUND

[0002] The cord fabric is a tire framework fabric woven by strong strand as warp and thin single yarn as weft. The warp is arranged closely, and the weft is arranged sparsely, which looks like a curtain, so it is named as cord fabric. The warp, also called cord line, bears the load, and the weft fixes the position of the warp. The cord fabric is used as the main pressure bearing layer of the oil pipeline, and its main performance features are high strength, small elongation and good bending performance.

[0003] The existing sea floating oil pipeline has a cord pressure bearing layer and a steel wire framework layer in the pipeline wall. The framework cord fabric of the cord pressure bearing layer only has the pressure bearing function and has no other functions.

[0004] The sea floating oil pipeline has a complex structure and is floated on the sea surface all the year round. It is easily subjected to fatigue damage caused by environmental loads such as wind, wave and current, and causes oil leakage. The steel wire framework layer is the framework of the sea floating oil pipeline and bears the main load in use. Under the stress of the hose, the spiral steel bars in the steel wire framework layer generate a large stress on the surrounding rubber. By establishing a finite element model of the hose and solving the finite element model, the stress and strain results of each node of the floating hose can be obtained. According to the stress and strain results, each structure layer has a relatively average stress in the middle of the pipe section, and the stress nephogram of each structure layer presents obvious periodic characteristics and is distributed in the form of stripes. The interval of the stripes is approximately the same as the pitch of the spiral steel bars. It can be seen that the spiral steel bars cause the periodic distribution of the stress. The position with lower service life of the sea floating oil pipeline appears at the position where the spiral steel bars are wound. This is because the elastic modulus of the steel bar and the rubber is quite different, which causes a large strain gradient of the rubber and thus causes the decrease of the service life. How to solve the stress problem caused by the spiral steel bars and find a substitute product is a problem to be solved at present. SUMMARY

[0005] The purpose of the present application is to provide a sea floating oil pipeline framework cord fabric which can replace the steel wire to solve the defects of the steel wire in the sea floating oil pipeline.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] A sea floating oil pipeline framework cord fabric is woven by carbon lines as warp and carbon fiber lines as weft. The warp is a single strand line without twisting.

[0008] The warp of the present application adopts carbon material, is carbon and graphite material, is nonmetallic solid material with carbon element as main body, wherein the carbon material is substantially composed of non-graphite carbon material, and the graphite material is substantially composed of graphite carbon material, has the characteristics of light weight, porosity, corrosion resistance, low thermal expansion, low elasticity, high tensile strength, good flexibility, etc., and by increasing the diameter of the carbon wire, the carbon wire is used as the warp of the cord fabric, the force borne by the traditional single thick steel wire framework is dispersed to each carbon wire, not only has equivalent bearing capacity with the single thick steel wire framework, but also disperses the stress existing in the single thick steel wire framework, greatly improves the fatigue life of the sea floating oil pipeline.

[0009] Twist is the number of twists per unit length. With the increase of twist, the tightness and strength of the wire increase, but the greater the twist, the greater the stress existing in the wire. Because twisting affects the elongation and strength of the cord, in the technical solution, the warp is a single strand wire without twisting, and the diameter of the carbon wire is increased, which not only eliminates the influence of twist parameter on the warp, but also greatly improves the tensile strength and bearing capacity of the framework cord fabric.

[0010] Preferably, the warp density is 32-40 strands per 10 cm, and the weft density is 16-20 strands per 10 cm.

[0011] Preferably, the carbon fiber wire is a 3-strand carbon fiber wire combined and twisted.

[0012] Preferably, the diameter of the carbon wire is 2.2-2.8 mm, and the diameter of the carbon fiber wire is 1.1-1.4 mm.

[0013] Preferably, the tensile strength of the 10 cm wide framework cord fabric is greater than 200 MPa, and the elongation is not greater than 14%.

[0014] Preferably, the surface of the carbon wire is wrapped with a 0.1-0.3 mm thick rubber layer.

[0015] Preferably, the surface of the carbon fiber wire is wrapped with a 0.2-0.4 mm thick rubber layer.

[0016] A preparation method of a sea floating oil pipeline framework cord fabric, comprising the following steps:

[0017] S1, making warp and weft wrapped with rubber: the single-strand wire diameter 2.2-2.8mm carbon wire is guided into the rubber emulsion in the dipping tank, the dipped carbon wire passes through the scraping thickness hole above the rubber liquid surface after passing through the turning pulley below the rubber liquid surface in the dipping tank, and the 0.1-0.3mm thick rubber is formed on the surface of the carbon wire to form the rubber wrapped carbon wire, and the rubber wrapped carbon wire is further cooled in the quenching tank and wound on the winding disc as the warp; the 3 strands of carbon fiber wire are combined and twisted to form carbon fiber wire, which is guided into the rubber liquid in the dipping tank through the guide wire pulley, the dipped carbon fiber wire passes through the scraping thickness hole above the rubber liquid surface after passing through the turning pulley below the rubber liquid surface in the dipping tank, and the 0.2-0.4mm thick rubber is formed on the surface of the carbon fiber wire to form the rubber wrapped carbon fiber wire, and the rubber wrapped carbon fiber wire is further cooled in the quenching tank and wound on the winding disc as the weft;

[0018] S2, mixing the warp and weft: the warp and weft are installed on the warp knitting machine to mix and weave into the gray cloth;

[0019] S3, preheating the gray cloth: the gray cloth passes through the preheating tank, and the temperature in the preheating tank is 80-90℃;

[0020] S4, fusion rolling: the preheated gray cloth is rolled by the pair of rollers to make the rubber on the warp and the rubber on the weft fuse together;

[0021] S5, slitting: the fused and rolled gray cloth is cut into 5-10cm wide sea surface floating oil pipeline skeleton cord fabric by the slitting device;

[0022] S6, winding into a disc: the sea surface floating oil pipeline skeleton cord fabric is wound into a disc.

[0023] The beneficial effects of the present application are:

[0024] The present application uses single-strand thick carbon wire as warp, disperses the force borne by the traditional single thick steel wire skeleton to each carbon wire, has the characteristics of good flexibility, small stress, large tensile strength and strong carrying capacity, can replace the steel wire skeleton, not only has equivalent carrying capacity with the single thick steel wire skeleton, but also disperses the stress existing in the single thick steel wire skeleton, can solve the problem of large stress and concentration of steel wire as skeleton, and use the present application as the skeleton of sea surface floating oil pipeline, can improve the service life of the sea surface floating oil pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application, and other drawings can be obtained by the following drawings without creative labor for ordinary skilled in the art:

[0026] Figure 1 This is a schematic diagram of the structure of the skeleton curtain fabric of the present invention;

[0027] Figure 2 This is a flowchart illustrating the preparation method of the skeleton curtain fabric of the present invention.

[0028] In the diagram: 1. Carbon fiber wire; 2. Carbon fiber wire; 3. Rubber layer; 4. Rubber layer. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper surface," "lower surface," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "forward," "reverse," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Example 1

[0032] like Figure 1 As shown, a type of skeleton cord fabric for a floating oil pipeline is woven with carbon fiber yarn 1 as the warp and carbon fiber yarn 2 as the weft. The warp yarn is a single strand that does not require twisting. The warp density is 32-40 strands / 10cm, and the weft density is 16-20 strands / 10cm. The carbon fiber yarn is formed by combining and twisting three carbon fiber filaments. The diameter of the carbon fiber filament is 1.1-1.4mm. The tensile strength of a 10cm wide skeleton cord fabric is greater than 200MPa, and the elongation at break is not greater than 14%. The surface of the carbon fiber yarn is covered with a rubber layer 3. The surface of the carbon fiber filament is covered with a rubber layer 4.

[0033] like Figure 2 As shown, a method for preparing the skeleton fabric of a floating oil pipeline includes the following steps:

[0034] S1. Making rubber-coated warp and weft yarns: A single strand of carbon fiber with a diameter of 2.2mm is guided into the rubber latex in the impregnation tank via a guide pulley. After impregnation, the carbon fiber is passed around a guide pulley below the rubber latex surface in the impregnation tank and then passes upward through a scraper hole above the rubber latex surface, forming a 0.1mm thick rubber layer on the surface of the carbon fiber, thus forming a rubber-coated carbon fiber. The rubber-coated carbon fiber continues to pass upward through a quenching box for quenching treatment and is then wound onto a take-up reel as warp yarn. Three strands of carbon fiber are combined and twisted to form a carbon fiber yarn. The carbon fiber yarn is guided into the rubber latex in the impregnation tank via a guide pulley. After impregnation, the carbon fiber yarn is passed around a guide pulley below the rubber latex surface in the impregnation tank and then passes upward through a scraper hole above the rubber latex surface, forming a 0.2mm thick rubber layer on the surface of the carbon fiber yarn, thus forming a rubber-coated carbon fiber yarn. The rubber-coated carbon fiber yarn continues to pass upward through a quenching box for quenching treatment and is then wound onto a take-up reel as weft yarn.

[0035] S2. Mixing warp and weft yarns: Install warp and weft yarns on a warp knitting machine and mix them to form a greige fabric;

[0036] S3. Fabric preheating: Pass the fabric through the preheating box, where the temperature is 80℃.

[0037] S4. Fusion Rolling: After the preheated fabric is rolled by two rollers, the rubber on the warp and weft threads are fused together.

[0038] S5. Slitting: The fused and rolled fabric is slitting into 5cm wide marine floating oil pipeline frame curtain fabric by a slitting device.

[0039] S6. Roll up into a coil: Roll up the curtain fabric of the floating oil pipeline frame into a coil.

[0040] Example 2

[0041] like Figure 2 As shown, a method for preparing the skeleton fabric of a floating oil pipeline includes the following steps:

[0042] S1, making warp and weft wrapped with rubber: the single-strand line diameter 2.8mm carbon line is guided into the rubber emulsion in the dipping tank, the dipped carbon line is guided through the scraping thickness hole above the rubber liquid surface after passing the turning pulley below the rubber liquid surface in the dipping tank, the 0.3mm thick rubber is formed on the surface of the carbon line, the wrapped carbon line is formed, the wrapped carbon line is guided through the quenching tank for quenching treatment, and is wound on the winding disc as the warp; the 3 carbon fiber filaments are combined and twisted to form carbon fiber line, the carbon fiber line is guided into the rubber liquid in the dipping tank, the dipped carbon fiber line is guided through the scraping thickness hole above the rubber liquid surface after passing the turning pulley below the rubber liquid surface in the dipping tank, the 0.4mm thick rubber is formed on the surface of the carbon fiber line, the wrapped carbon fiber line is formed, the wrapped carbon fiber line is guided through the quenching tank for quenching treatment, and is wound on the winding disc as the weft.

[0043] S2, mixing the warp and weft: the warp and weft are installed on the warp knitting machine to mix and weave into the gray cloth;

[0044] S3, preheating the gray cloth: the gray cloth is guided through the preheating tank, and the temperature in the preheating tank is 90℃;

[0045] S4, fusion rolling: the preheated gray cloth is rolled through the double roller to fuse the rubber on the warp and the rubber on the weft together;

[0046] S5, slitting: the fused and rolled gray cloth is slitted into the 10cm wide sea floating oil pipeline skeleton cord fabric through the slitting device;

[0047] S6, winding into a disc: the sea floating oil pipeline skeleton cord fabric is wound into a disc.

[0048] The detection results of the 10cm wide sea floating oil pipeline skeleton cord fabric of the application are shown in Table 1:

[0049] Table 1 is the detection results

[0050]

[0051] Example 3

[0052] A sea floating oil pipeline skeleton cord fabric is woven by taking carbon line as warp and carbon fiber line as weft, the warp is single-strand line without twisting. The warp density is 36 strands / 10cm, and the weft density is 18 strands / 10cm. The carbon fiber line is formed by combining and twisting 3 carbon fiber filaments.

[0053] The diameter of the carbon wire is 2.5 mm, and the diameter of the carbon fiber wire is 1.3 mm. The tensile strength of the 10 cm wide framework cord fabric is greater than 800 MPa, and the elongation is not greater than 14% of the breaking elongation.

[0054] In this embodiment, the surfaces of the carbon wire and the carbon fiber wire are not coated with glue before weaving, so the production process of the sea floating oil pipeline framework cord fabric in this embodiment can use ordinary weaving process, and the specific weaving process is not described. After the framework cord fabric is woven according to the above specifications, a gray fabric is formed. After the surface of the gray fabric is coated with glue and covered with release paper, it is cut and finally wound into a roll.

[0055] The detection results of the 10 cm wide sea floating oil pipeline framework cord fabric of the present application are shown in Table 2:

[0056] Table 2 is the detection results

[0057]

[0058] From the above experimental results, the breaking strength of the framework cord fabric is greatly improved, greatly improving the carrying capacity in the sea floating oil pipeline. Not only has pressure bearing function, but also can replace steel wire and serve as the framework of the sea floating oil pipeline, thereby solving the stress problem of the steel wire in the sea floating oil pipeline, thereby improving the service life of the sea floating oil pipeline. The framework cord fabric developed in the present application has high tensile strength and carrying capacity, good flexibility, small stress, and can replace steel wire.

[0059] In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A marine surface floating oil pipeline carcass cord fabric, characterized by: It is woven with carbon wire as warp and carbon fiber wire as weft, the warp is single wire without twisting, the warp density is 32-40 per 10 cm, the weft density is 16-20 per 10 cm, the carbon fiber wire is 3 carbon fiber filaments combined and twisted, the diameter of the carbon wire is 2.2-2.8 mm, the diameter of the carbon fiber filament is 1.1-1.4 mm, the tensile strength of the 10 cm wide framework cord fabric is greater than 200 MPa, the elongation at break is not more than 14%, the surface of the carbon fiber filament is wrapped with a 0.2-0.4 mm thick rubber layer, and the surface of the carbon wire is wrapped with a 0.1-0.3 mm thick rubber layer.

2. The preparation method of the sea surface floating oil pipeline framework cord fabric according to claim 1, characterized in that: S1, making rubber-coated warp and weft: the single wire diameter of the carbon wire is 2.2-2.8 mm, the carbon wire is guided into the rubber emulsion in the dipping tank through the guide pulley, the dipped carbon wire passes through the turning pulley below the rubber liquid surface in the dipping tank and then passes through the rubber thickness hole above the rubber liquid surface, forming a 0.1-0.3 mm thick rubber layer on the surface of the carbon wire to form a rubber-coated carbon wire, the rubber-coated carbon wire continues to pass through the quenching tank for quenching treatment and is wound on the winding disc as the warp; the 3 carbon fiber filaments are combined and twisted to form a carbon fiber wire, the carbon fiber wire is guided into the rubber liquid in the dipping tank through the guide pulley, the dipped carbon fiber wire passes through the turning pulley below the rubber liquid surface in the dipping tank and then passes through the rubber thickness hole above the rubber liquid surface, forming a 0.2-0.4 mm thick rubber layer on the surface of the carbon fiber wire to form a rubber-coated carbon fiber wire, the rubber-coated carbon fiber wire continues to pass through the quenching tank for quenching treatment and is wound on the winding disc as the weft; S2, mixing the warp and weft: the warp and weft are installed on the warp knitting machine to mix and weave into a gray fabric; S3, preheating the gray fabric: the gray fabric passes through the preheating tank, and the temperature in the preheating tank is 80-90℃; S4, fusion rolling: the preheated gray fabric is rolled by the roller to fuse the rubber on the warp and the rubber on the weft together; S5, slitting: the fused and rolled gray fabric is cut into 5-10 cm wide sea surface floating oil pipeline framework cord fabric by the slitting device; S6, winding into a disc: the sea surface floating oil pipeline framework cord fabric is wound into a disc.

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