Environment-friendly cable metal sheath anti-corrosion insulation composite structure

Abstract

The utility model discloses an environmental protection type cable metal sheath anticorrosive insulation composite structure relates to cable technical field, including anticorrosive layer, the inside wall of anticorrosive layer is fixedly connected with the armor layer, the inside wall of armor layer is fixedly connected with the insulation layer, and the inside along anticorrosive layer axle core annular distribution of insulation layer is equipped with a plurality of first metal sheath, and the axle core of anticorrosive layer is equipped with fixed column coaxially, the utility model discloses through the cooperation of fixed column, support ring and connecting strip, is convenient to the stable support of second metal sheath formation, has improved the anti -twist ability of overall structure, and then can reduce the deformation of metal sheath when twisting, again through the cooperation of first metal sheath and tensile metal wire, is convenient to strengthen the tensile property of first metal sheath, has improved its structural stability when twisting, and then can protect internal optical fiber from extrusion, finally solved the problem that traditional cable anti -twist ability is weak, and metal sheath easily deforms and breaks and leads to optical fiber breakage, improved the service life and operation safety of cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to an environmentally friendly composite structure for corrosion-resistant and insulating metal sheaths of cables. Background Technology

[0002] During cable operation, its metal sheath faces numerous environmental challenges, especially its resistance to torsion, which directly affects the cable's service life and safe operation. Traditional cable structures have weak resistance to torsional forces. When subjected to torsional forces during laying, installation, or use, the internal metal sheath is prone to deformation and breakage. The anti-corrosion layer and insulation layer may also develop cracks due to torsion, leading to corrosion of the metal sheath. At the same time, the insulation performance deteriorates, making leakage more likely. This not only poses safety hazards but also results in energy waste.

[0003] The existing cables lack effective anti-torsional support and fixation between the internal metal sheaths. Under torsional forces, relative displacement and friction easily occur between the metal sheaths, further aggravating structural damage and affecting the overall structural strength of the cable. Moreover, the protection method for the internal optical fibers is significantly inadequate, usually only protected by a thin metal sleeve. This simple protection structure is difficult to withstand external impacts under cable torsion, which can easily lead to the optical fibers being squeezed and broken, causing signal transmission interruption. Therefore, improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an environmentally friendly composite structure for the corrosion protection and insulation of cable metal sheaths.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an environmentally friendly cable metal sheath anti-corrosion and insulation composite structure, including an anti-corrosion layer, an armor layer fixedly connected to the inner wall of the anti-corrosion layer, an insulation layer fixedly connected to the inner wall of the armor layer, a plurality of first metal sheaths arranged in a ring along the axis of the anti-corrosion layer in the insulation layer, and a fixing column coaxially provided at the axis of the anti-corrosion layer.

[0006] Preferably, the fixed column is provided with a plurality of connecting strips around its periphery, and a second metal sheath is fixedly connected to the end of each connecting strip. A shielding layer is attached to the inner wall of the second metal sheath, and a semiconductor layer is provided on the inner wall of the shielding layer. A wire channel is opened in the semiconductor layer.

[0007] Preferably, a support ring is coaxially provided on the outer wall of the fixed column, and the connecting strip, the support ring, and the fixed column are integrated as one piece.

[0008] Preferably, an optical fiber is threaded through the middle of the first metal sheath, and tensile metal wires are symmetrically arranged on both sides of the optical fiber, with the tensile metal wires located inside the first metal sheath.

[0009] Preferably, the insulating layer is filled with a filling layer that wraps around the first metal sheath, the second metal sheath, the connecting strip, and the outer wall of the support ring.

[0010] Preferably, the second metal sheath and the first metal sheath are coaxially spaced apart.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The combination of the fixed column, support ring, and connecting strip facilitates stable support for the second metal sheath, improving the overall structure's resistance to torsion and reducing deformation of the metal sheath during torsion. Furthermore, the combination of the first metal sheath and the tensile metal wire enhances the tensile strength of the first metal sheath, improving its structural stability during torsion and protecting the internal optical fiber from compression. The filling layer encapsulating the first and second metal sheaths and other structures facilitates the integration of all components into a unified whole, improving the structural integrity and resistance to torsion, thereby reducing relative displacement and friction between components. The combination of the anti-corrosion layer and the armor layer enhances protection for the internal structure, improving corrosion resistance and insulation performance, thus preventing corrosion and leakage caused by torsion. Ultimately, this invention solves the problems of weak torsion resistance and easy deformation and breakage of the metal sheath in traditional cables, leading to optical fiber breakage, and improves the cable's service life and operational safety. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model;

[0014] Figure 2 This is a second-view schematic diagram of the overall structure proposed in this utility model;

[0015] Figure 3 This is a first-view schematic diagram of a partial cross-sectional structure of the anti-corrosion layer proposed in this utility model.

[0016] Figure 4 This is a second-view schematic diagram of the partial cross-sectional structure of the anti-corrosion layer proposed in this utility model.

[0017] The numbers in the diagram are: 1. Anti-corrosion layer; 2. Armor layer; 3. Insulation layer; 4. First metal sheath; 5. Conductor channel; 6. Filler layer; 7. Tensile metal wire; 8. Optical fiber; 9. Second metal sheath; 10. Shielding layer; 11. Semiconductor layer; 12. Connecting strip; 13. Support ring; 14. Fixing post. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-4 This utility model discloses an environmentally friendly composite structure for the corrosion-resistant and insulating metal sheath of cables, comprising an anti-corrosion layer 1, an armor layer 2 fixedly attached to the inner wall of the anti-corrosion layer 1, an insulating layer 3 fixedly attached to the inner wall of the armor layer 2, and a plurality of first metal sheaths 4 arranged in a ring around the axis of the anti-corrosion layer 1 within the insulating layer 3. A fixing post 14 is coaxially provided at the axis of the anti-corrosion layer 1. The anti-corrosion layer 1 is made of polyolefin material, which has good corrosion resistance and insulation. The armor layer 2 is made of galvanized steel strip and is coated with... The zinc-steel strip armor layer 2 improves the overall mechanical strength and corrosion resistance of the structure. This section of the structure, through the cooperation of the anti-corrosion layer 1, armor layer 2, and insulation layer 3, provides protection for the internal structure, enhancing corrosion resistance and insulation performance, and reducing the risk of corrosion and leakage caused by torsion. Multiple connecting strips 12 are provided around the fixed column 14, and each connecting strip 12 has a second metal sheath 9 fixedly attached to its end. A shielding layer 10 is fitted to the inner wall of the second metal sheath 9, and a semiconductor layer 11 is provided on the inner wall of the shielding layer 10. Conductor layer 11 has a wire channel 5; the fixing post 14 is made of rigid plastic, which is lightweight and has a certain strength, and can stably support the connecting strip 12; the shielding layer 10 is made of copper mesh, which can effectively shield external electromagnetic interference and ensure stable signal transmission; in this structure, the fixing post 14 supports the second metal sheath 9 through the connecting strip 12, and the shielding layer 10 and semiconductor layer 11 optimize the transmission environment of the wire channel 5, improving the structure's anti-torsion support capability and signal transmission quality; a support ring 13 is coaxially provided on the outer wall of the fixing post 14, and the connecting strip 12, support ring 13 and fixing post 14 are integrated; the support ring 13 is made of aluminum alloy, which is lightweight and has high strength, and can enhance the stability of the overall structure; this structure, through the integrated design of the connecting strip 12, support ring 13 and fixing post 14, improves the support strength of the second metal sheath 9 and enhances the anti-torsion performance of the overall structure.

[0020] In this invention, an optical fiber 8 is threaded through the center of the first metal sheath 4, and tensile metal wires 7 are symmetrically arranged on both sides of the optical fiber 8, with the tensile metal wires 7 located inside the first metal sheath 4. The optical fiber 8 is of model GJFJH-4B1. The tensile metal wires 7 are made of steel wire, which significantly improves the tensile strength of the first metal sheath 4. In this structure, the tensile metal wires 7 work in conjunction with the first metal sheath 4 to protect the optical fiber 8, reducing the possibility of the optical fiber 8 being squeezed and broken during twisting, thus ensuring the continuity of signal transmission. The insulating layer 3 is filled with a filling layer 6 that wraps around the outer walls of the first metal sheath 4, the second metal sheath 9, the connecting strip 12, and the support ring 13. The filling layer 6 is made of polypropylene. The filler layer 6, made of polypropylene, possesses excellent flexibility and insulation, enabling it to tightly bind the various components into a whole. This structure, by wrapping the components with the filler layer 6, reduces the relative displacement and friction between components during torsion, thereby improving the overall structure's torsional resistance and stability. The second metal sheath 9 and the first metal sheath 4 are coaxially spaced. The second metal sheath 9 is made of copper alloy, and the first metal sheath 4 is also made of copper alloy. The use of copper alloy metal sheaths provides excellent conductivity and ductility, reducing deformation during torsion. This structure, by coaxially spaced between the second metal sheath 9 and the first metal sheath 4, optimizes the stress distribution and further enhances the overall structure's torsional resistance.

[0021] Working principle: In the application of this utility model, the anti-corrosion layer 1, as the outermost layer, is in direct contact with the external environment, playing a role in isolating corrosive media. The armor layer 2 enhances the mechanical strength of the overall structure, resists external impact and compression, and protects the internal insulation layer 3 and other components. The insulation layer 3 provides an insulating environment for the internal first metal sheath 4 and second metal sheath 9, preventing leakage. The fixing column 14 is located at the axis, and forms a stable support for the second metal sheath 9 through the support ring 13 and the connecting strip 12, making the second metal sheath 9 less prone to deformation under torsional force. At the same time, the connecting strip 12 is integrated with the support ring 13 and the fixing column 14, improving the torsional resistance of the overall structure. The tensile-strength metal wires 7 inside the metal sheath 4 enhance its tensile strength. Combined with the structural strength of the first metal sheath 4 itself, they effectively protect the internal optical fiber 8, preventing it from being squeezed and broken during twisting. The filling layer 6 fills the insulation layer 3, tightly wrapping the first metal sheath 4, the second metal sheath 9, the connecting strip 12, and the support ring 13, making all components form a whole and reducing the relative displacement and friction between components during twisting. The second metal sheath 9 is coaxially spaced with the first metal sheath 4. Together with the filling layer 6, it further optimizes the stress distribution of the overall structure, enhances the anti-twisting effect, and ensures the stable operation of the cable under various working conditions. At this point, the device is complete.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An environmentally friendly composite structure for the corrosion protection and insulation of a cable metal sheath, comprising a corrosion protection layer (1), characterized in that: An armor layer (2) is fixedly attached to the inner wall of the anti-corrosion layer (1), and an insulating layer (3) is fixedly attached to the inner wall of the armor layer (2). Multiple first metal sleeves (4) are arranged in a ring around the axis of the anti-corrosion layer (1) in the insulating layer (3). A fixing post (14) is coaxially provided at the axis of the anti-corrosion layer (1). Multiple connecting strips (12) are provided around the fixing post (14). A second metal sleeve (9) is fixedly attached to the end of each connecting strip (12). A shielding layer (10) is attached to the inner wall of the second metal sleeve (9).

2. The environmentally friendly cable metal sheath anti-corrosion and insulation composite structure according to claim 1, characterized in that: The shielding layer (10) has a semiconductor layer (11) on its inner wall, and a wire channel (5) is formed in the semiconductor layer (11).

3. The environmentally friendly cable metal sheath anti-corrosion and insulation composite structure according to claim 2, characterized in that: A support ring (13) is coaxially provided on the outer wall of the fixed column (14), and the connecting strip (12) is integrated with the support ring (13) and the fixed column (14).

4. The environmentally friendly cable metal sheath anti-corrosion and insulation composite structure according to claim 3, characterized in that: An optical fiber (8) is inserted through the middle of the first metal sheath (4), and tensile metal wires (7) are symmetrically arranged on both sides of the optical fiber (8). The tensile metal wires (7) are located inside the first metal sheath (4).

5. The environmentally friendly cable metal sheath anti-corrosion and insulation composite structure according to claim 4, characterized in that: The insulating layer (3) is filled with a filling layer (6) that wraps the outer walls of the first metal sheath (4), the second metal sheath (9), the connecting strip (12) and the support ring (13).

6. The environmentally friendly cable metal sheath anti-corrosion and insulation composite structure according to claim 5, characterized in that: The second metal sheath (9) and the first metal sheath (4) are coaxially spaced apart.

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