A flexible cable casing

Abstract

The present invention provides a flexible cable casing, in which an inner core tube, a first tensile layer, an anti-wear layer, a second tensile layer, a fiber protective layer and an outer protective layer are arranged in sequence from the inside to the outside, and the outer protective layer is made of an anti-corrosion material. The flexible cable casing disclosed above can not only effectively avoid seawater corrosion, but also protect against external impact and attachment erosion of marine organisms, and can prevent the cable from dynamically bending and seabed wear problems in strong winds and waves, and resist ice impact in winter.

Description

Technical Field

[0001] The invention relates to the field of cable protection, in particular to a flexible cable sleeve. Background Art

[0002] The cable is a rope-like cable made of several or several groups of conductors (at least two in each group). Each group of conductors is insulated from each other and often twisted around a center. The entire outside is covered with a highly insulating covering layer, which is conventionally made of polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber and mineral insulating materials, giving the cable the characteristics of internal electrification and external insulation.

[0003] With the development of offshore wind power projects in my country, cables in seawater need to face external impacts and the attachment and erosion of marine organisms. Therefore, there is an urgent need for a protective casing that can protect cables on the seabed. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a flexible cable casing to protect the cable in seawater.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A cable flexible casing comprises: an inner core tube, a first tensile layer, an anti-wear layer, a second tensile layer, a fiber protection layer and an outer protective layer;

[0007] The inner core tube, the first tensile layer, the anti-wear layer, the second tensile layer, the fiber protection layer and the outer protection layer are arranged in sequence from the inside to the outside, wherein the outer protection layer is made of corrosion-resistant material.

[0008] Preferably, the inner core tube comprises: an inner lining layer, a skeleton layer and a coating layer;

[0009] The lining layer is arranged inside the skeleton layer;

[0010] The covering layer is sleeved on the skeleton layer.

[0011] Preferably, the skeleton layer is formed by winding steel wire around the inner lining layer.

[0012] Preferably, the lining layer and / or the coating layer is made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer.

[0013] Preferably, the first tensile layer is formed by a plurality of fiber strips being forwardly wound along the axial direction of the inner core tube at a preset angle;

[0014] The second tensile layer is formed by a plurality of fiber bands being wound in the opposite direction along the axial direction of the inner core tube at a preset angle.

[0015] Preferably, the fiber belt is made of any one of polyester, aramid, basalt and glass fiber.

[0016] Preferably, the first tensile layer is formed by a plurality of metal armored steel wires being forwardly wound along the axial direction of the inner core tube at a preset angle;

[0017] The second tensile layer is formed by winding a plurality of metal armor steel wires in the opposite direction along the axis of the inner core tube at a preset angle.

[0018] Preferably, the preset angle range is 30° to 50°.

[0019] Preferably, the anti-wear layer is made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer.

[0020] Preferably, the fiber protective layer is formed by twisting aramid fibers and yarns.

[0021] Based on the above-mentioned flexible cable casing provided by the present invention, the inner core tube, the first tensile layer, the anti-wear layer, the second tensile layer, the fiber protective layer and the outer protective layer are arranged in sequence from the inside to the outside, and the outer protective layer is made of anti-corrosion material. The above-mentioned flexible cable casing can not only effectively avoid seawater corrosion, but also protect against external impact and attachment erosion of marine organisms, and can prevent the cable from dynamically bending and seabed wear problems in strong winds and waves, and resist ice impact in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a flexible cable sleeve provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of an inner core tube provided by an embodiment of the present invention;

[0025] Figure 3 A cross-sectional view of an inner core tube provided in an embodiment of the present invention.

[0026] Among them, there are an inner core tube 1, an inner lining layer 11, a skeleton layer 12, a covering layer 13, a first tensile layer 2, an anti-wear layer 3, a second tensile layer 4, a fiber protective layer 5, and an outer protective layer 6. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0028] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0029] The embodiment of the present invention provides a flexible cable sleeve, see Figures 1 to 3 , Figure 1 The structure diagram of the flexible cable casing includes: an inner core tube 1, a first tensile layer 2, an anti-wear layer 3, a second tensile layer 4, a fiber protective layer 5 and an outer protective layer 6;

[0030] The inner core tube 1, the first tensile layer 2, the anti-wear layer 3, the second tensile layer 4, the fiber protection layer 5 and the outer protection layer 6 are arranged in sequence from the inside to the outside, wherein the outer protection layer 6 is made of corrosion-resistant material.

[0031] It should be noted that the inner core tube 1 of the present application is mainly used for placing the cable inside the casing and for protecting against external impact and extrusion to play a buffering role, while the first tensile layer 2 and the second tensile layer 4 mainly play a role in enhancing the axial tensile performance of the pipeline, the anti-wear layer 3 prevents the first tensile layer 2 and the second tensile layer 4 from wear, and the fiber protective layer 5 is used to fix the first tensile layer 2 and the second tensile layer 4, and prevent radial (birdcage) buckling failure caused by axial extrusion of the cable flexible casing.

[0032] Since the outer protective layer 6 of the present application is made of corrosion-resistant material, the outer protective layer 6 is not only corrosion-resistant, but also can provide certain protection to the flexible cable casing during transportation and installation.

[0033] In the embodiment of the present invention, the inner core tube 1, the first tensile layer 2, the anti-wear layer 3, the second tensile layer 4, the fiber protective layer 5 and the outer protective layer 6 are sequentially arranged from the inside to the outside, and the outer protective layer 6 is made of anti-corrosion material. The above-disclosed flexible cable casing can not only effectively avoid seawater corrosion, but also protect against external impact and attachment erosion of marine organisms, and can prevent the cable from dynamically bending and seabed wear problems in strong winds and waves, and resist ice impact in winter.

[0034] Preferably, the outer protective layer 6 is formed by a high molecular polymer through an extrusion coating process.

[0035] It should be noted that the outer protective layer 6 is mainly made of polyethylene, polyurethane, nylon, and cost-effective, highly wear-resistant chain or network polymers.

[0036] Specifically, the inner core tube 1 includes: an inner lining layer 11, a skeleton layer 12 and a cladding layer 13;

[0037] The lining layer 11 is arranged inside the skeleton layer;

[0038] The coating layer 13 is sleeved on the skeleton layer 12 .

[0039] It should be noted that the lining layer 11 is arranged inside the skeleton layer, and the coating layer 13 is sleeved on the skeleton layer 12 , and the skeleton layer 12 can significantly increase the anti-extrusion and anti-large bending performance of the inner core tube 1 .

[0040] Specifically, the skeleton layer 12 is formed by winding steel wires around the inner lining layer 11 .

[0041] It should be noted that the skeleton layer 12 is formed by winding steel wires around the inner lining layer 11 , which can further increase the anti-extrusion and anti-large bending performance of the inner core tube 1 .

[0042] It should also be noted that during production, the inner core tube 1 can be formed simultaneously with the skeleton layer 12 by two or more extruders.

[0043] It is worth noting that in the present application, the skeleton layer 12 can be made of other materials as required, and the wire diameter and pitch of the steel wire can be selected as required, and customized adjustment can be performed through surface preheating and softening treatment so that the skeleton layer 12 can be bonded and cured with the lining layer 11 and the covering layer 13.

[0044] Specifically, the lining layer 11 and / or the coating layer 13 are made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer.

[0045] It should be noted that the lining layer 11 and the covering layer 13 can be made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer, or can be made of different materials. Those skilled in the art can choose according to needs.

[0046] Specifically, the first tensile layer 2 is formed by a plurality of fiber strips being forwardly wound along the axial direction of the inner core tube 1 at a preset angle;

[0047] The second tensile layer 4 is formed by a plurality of fiber strips wound in the opposite direction along the axial direction of the inner core tube 1 at a preset angle.

[0048] It should be noted that the first tensile layer 2 is arranged to be composed of multiple fiber tapes wound in the forward direction along the axial direction of the inner core tube 1 at a preset angle, and the second tensile layer 4 is arranged to be composed of multiple fiber tapes wound in the reverse direction along the axial direction of the inner core tube 1 at a preset angle, which can further enhance the axial tensile performance of the cable flexible sleeve.

[0049] It should also be noted that the first tensile layer 2 and the second tensile layer 4 are both formed by cross-winding an even number of fiber tapes.

[0050] Specifically, the fiber belt is made of any one of polyester, aramid, basalt and glass fiber.

[0051] It should be noted that the fiber belt can be made of polyester, aramid, or basalt. Those skilled in the art can make it from any one of polyester, aramid, basalt and glass fiber according to needs.

[0052] Preferably, the thickness of the fiber tape is in the range of 0.3 mm to 5.0 mm.

[0053] It should be noted that the thickness of the fiber band can be 0.3 mm, 3.0 mm, or 5.0 mm. Those skilled in the art can select any thickness between 0.3 mm and 5.0 mm according to the requirements.

[0054] Specifically, the first tensile layer 2 is formed by a plurality of metal armored steel wires being forwardly wound along the axial direction of the inner core tube 1 at a preset angle;

[0055] The second tensile layer 4 is formed by winding a plurality of metal armored steel wires in the opposite direction along the axial direction of the inner core tube 1 at a preset angle.

[0056] It should be noted that the first tensile layer 2 is arranged to be composed of multiple metal armored steel wires axially along the inner core tube 1 and forwardly wound at a preset angle, and the second tensile layer 4 is arranged to be composed of multiple metal armored steel wires axially along the inner core tube 1 and reversely wound at a preset angle, which can further enhance the axial tensile performance of the cable flexible sheath.

[0057] Preferably, the first tensile layer 2 and the second tensile layer 4 are formed by twisting and weaving materials with circular or rectangular cross-sections.

[0058] The first tensile layer 2 and the second tensile layer 4 of the present application are made of woven fiber belts when the underwater weight of the cable flexible casing is taken into consideration.

[0059] Specifically, the preset angle range is 30° to 50°.

[0060] It should be noted that the preset angle can be 30°, 35°, or 50°. Technical personnel in this field can select any preset angle between 30° and 50° according to their needs. However, since the smaller the preset angle, the higher the axial tensile strength, but the larger the bending radius of the cable flexible sheath, the preferred preset angle of this application is 30°.

[0061] Specifically, the anti-wear layer 3 is made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer.

[0062] It should be noted that the anti-wear layer 3 can be made of polyethylene, polyamide nylon, or polyurethane. Those skilled in the art can select any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular resin polymer to make the anti-wear layer 3 according to needs.

[0063] It is worth noting that the anti-wear layer 3 of the present application is usually extruded by an extruder.

[0064] Preferably, the thickness of the anti-wear layer 3 is in the range of 0.1 mm to 1.0 mm.

[0065] It should be noted that the thickness of the anti-wear layer 3 can be 0.1 mm, 0.8 mm, or 1.0 mm. Those skilled in the art can select the thickness of the anti-wear layer 3 from 0.1 mm to 1.0 mm according to the requirements.

[0066] Specifically, the fiber protection layer 5 is formed by twisting aramid fibers and yarns.

[0067] It should be noted that the fiber protective layer 5 can be made of aramid fiber and yarn twisted together, or can be made of other materials. Those skilled in the art can choose according to needs.

[0068] Preferably, the thickness of the fiber protective layer 5 is 0.3 mm to 1.0 mm.

[0069] It should be noted that the thickness of the fiber protective layer 5 can be 0.3 mm, 0.6 mm, or 1.0 mm. Those skilled in the art can select the thickness of the fiber protective layer 5 from 0.3 mm to 1.0 mm according to the requirements.

[0070] Preferably, the fiber protective layer 5 can be woven from aramid fibers and yarns twisted together according to a winding angle of 70° to 89.5°.

[0071] It should be noted that the fiber protective layer 5 can be formed by twisting aramid fibers and yarns in a forward direction or in a reverse direction, and those skilled in the art can make a choice according to needs.

[0072] It should also be noted that the winding angle can be 70°, 80°, or 89.5°, and those skilled in the art can choose according to needs.

[0073] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible cable casing, characterized in that: include: Inner core tube, first tensile layer, anti-wear layer, second tensile layer, fiber protection layer and outer protective layer; The inner core tube, the first tensile layer, the anti-wear layer, the second tensile layer, the fiber protection layer and the outer protection layer are arranged in sequence from inside to outside, wherein the outer protection layer is made of corrosion-resistant material.

2. The flexible cable sleeve according to claim 1, characterized in that: The inner core tube comprises: an inner lining layer, a skeleton layer and a coating layer; The lining layer is arranged inside the skeleton layer; The coating layer is sleeved on the skeleton layer.

3. The cable flexible sleeve according to claim 2, characterized in that: The skeleton layer is formed by winding steel wires around the inner lining layer.

4. The cable flexible sleeve according to claim 2, characterized in that: The inner lining layer and / or the coating layer is made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular weight resin polymer.

5. The flexible cable sleeve according to claim 1, characterized in that: The first tensile layer is formed by a plurality of fiber strips being forwardly wound along the axial direction of the inner core tube at a preset angle; The second tensile layer is formed by a plurality of fiber strips being wound in the opposite direction along the axial direction of the inner core tube and at the preset angle.

6. The flexible cable sleeve according to claim 5, characterized in that: The fiber belt is made of any one of polyester, aramid, basalt and glass fiber.

7. The flexible cable sleeve according to claim 1, characterized in that: The first tensile layer is formed by a plurality of metal armored steel wires being forwardly wound along the axial direction of the inner core tube at the preset angle; The second tensile layer is formed by winding a plurality of metal armored steel wires in the opposite direction along the axial direction of the inner core tube at the preset angle.

8. The flexible cable sleeve according to claim 5 or 7, characterized in that: The preset angle range is 30° to 50°.

9. The flexible cable sleeve according to claim 1, characterized in that: The anti-wear layer is made of any one of polyethylene, polyamide nylon, polyurethane, polyvinylidene fluoride and high molecular resin polymer.

10. The flexible cable sleeve according to claim 1, characterized in that: The fiber protection layer is formed by twisting aramid fiber and yarn.

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