Water-tree-resistant cross-linked polyethylene insulated optical fiber composite wet-type submarine cable

Abstract

The utility model relates to the technical field of submarine cable production, and discloses a water-tree-resistant cross-linked polyethylene insulated optical fiber composite wet-type submarine cable, which comprises a main body mechanism and an auxiliary mechanism, the auxiliary mechanism is positioned on the inner side of the main body mechanism, and the main body mechanism comprises a water-blocking conductor, a conductor shield and an insulating layer. According to the water-tree-resistant cross-linked polyethylene insulated optical fiber composite wet-type submarine cable and the production equipment, through installation of a main body mechanism, the elongation of copper monofilaments is controlled to be 30-35%, the resistivity is smaller than or equal to 0.017241 omega.mm / m, a layer of semi-conductive seawater-resistant water-blocking tape is longitudinally wrapped between every two layers of conductors, a layer of water-blocking yarn is bound outside the water-blocking tape, and the water-tree-resistant cross-linked polyethylene insulated optical fiber composite wet-type submarine cable is formed. The outer layer of the stranded conductor is wrapped by a layer of reverse semi-conductive water-blocking binding tape and a layer of semi-conductive tetoron tape, the water-blocking layer of the semi-conductive water-blocking binding tape faces the conductor, the overlapping positions of the two layers of semi-conductive tapes are not overlapped at the same position, the semi-conductive tapes are required to be flatly wrapped and uniformly overlapped, the overlapping rate is controlled to be 20-35%, and the insulating layer is made of an XLPE insulating material and has the thickness of 24.0 mm.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cable production, in particular to a water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable. Background Art

[0002] Submarine cables are cables wrapped in insulating materials, laid on the seabed, and used for telecommunication transmission. Submarine cables are divided into submarine communication cables and submarine power cables. Modern submarine cables use optical fiber as material to transmit telephone and Internet signals.

[0003] The existing patent CN205722889U proposes a dynamic optoelectronic composite submarine cable for a floating platform. The utility model includes a cable core and an outer winding layer of the cable core, wherein the outer winding layer of the cable core has a reinforced tape wrapping layer, a metal anti-corrosion tape, a first inner sheath, two layers of armored metal steel wire and a second outer sheath from the inside to the outside; wherein the cable core is twisted by a communication optical cable arranged at a central position and three low-voltage cables and three power cables arranged circumferentially around the communication optical cable; compared with the prior art, the utility model adopts a wet structure design without any waterproof metal sheath, which avoids the harm and pollution to the human body and the environment caused by the submarine cable during production and use, protects the environment, and on the premise that the submarine cable achieves the same performance including service life, it is light in weight and has excellent fatigue resistance, which is conducive to the laying of FPSO dynamic submarine cables.

[0004] However, the existing patent CN205722889U avoids the harm and pollution to human body and environment caused by submarine cables during production and use, protects the environment, and has light weight and excellent fatigue resistance while achieving the same performance including service life of the submarine cable, which is beneficial to the laying of FPSO dynamic submarine cables. However, since seawater may be highly corrosive, the outer wall of the cable may be damaged over a long period of time, affecting signal transmission. Utility Model Content

[0005] Technical problem to be solved: The purpose of the utility model is to provide a water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable to solve the problem in the above-mentioned background technology that seawater may be highly corrosive and may damage the outer wall of the cable over a long period of time, thereby affecting signal transmission.

[0006] Technical solution: To achieve the above-mentioned purpose, the utility model provides the following technical solution: an anti-water tree cross-linked polyethylene insulated optical fiber composite wet submarine cable, comprising a main body and an auxiliary body, wherein the auxiliary body is located on the inner side of the main body, and the main body comprises a water-blocking conductor, a conductor shield and an insulating layer, wherein the conductor shield is fixedly arranged on the outer side of the water-blocking conductor, and the insulating layer is fixedly arranged on the outer side of the conductor shield; the main body also comprises an insulating shield, a semi-conductive water-blocking buffer tape, a copper wire shield, a BDPE protective sleeve, a filling layer, a rubber-coated cloth bag and an inner lining layer, and the insulating shield is fixedly arranged on the outer side of the insulating layer.

[0007] Preferably, the semiconductive water-resistant buffer tape is fixedly arranged on the outside of the insulating shield, and the copper wire shield is fixedly arranged on the outside of the semiconductive water-resistant buffer tape. Through the installation of the main body mechanism, the elongation of the copper single wire is controlled at 30-35%, and the resistivity is ≤0.017241Ω·mm² / m. A layer of semiconductive seawater-resistant water-resistant tape is longitudinally wrapped between each layer of the conductor, a layer of water-resistant yarn is tied outside the water-resistant tape, and the outer layer of the twisted conductor is wrapped with a layer of reverse semiconductive water-resistant binding tape and a layer of semiconductive terephthalate tape.

[0008] Preferably, the BDPE protective sleeve is fixedly arranged on the outside of the copper wire shielding, the filling layer is fixedly arranged on the outside of the BDPE protective sleeve, the water-blocking layer of the semi-conductive water-blocking binding tape faces the conductor, the overlapping parts of the two layers of semi-conductive tapes shall not overlap in the same position, the semi-conductive tape is required to be wrapped flatly and overlap evenly, and the overlap rate is controlled at 20~35%.

[0009] Preferably, the rubber-coated cloth bag is fixedly arranged on the outside of the filling layer, and the lining layer is fixedly arranged on the outside of the rubber-coated cloth bag. The insulating layer adopts XLPE insulating material with a thickness of 24.0 mm. It can still operate normally under the influence of seawater. The lead sheath is 4.0 mm thick + the semi-conductive PE sheath is 4.0 mm thick. It has excellent waterproof performance and excellent electrical performance, and can be connected to the armored steel wire for grounding.

[0010] Preferably, the auxiliary mechanism includes a steel wire armor, an outer layer and an optical cable. The steel wire armor is fixedly arranged on the outside of the inner lining layer, and the inner and outer layers are both made of strong PP rope and asphalt anti-corrosion.

[0011] Preferably, the outer layer is fixedly arranged on the outside of the steel wire armor, and the outer layer is fixedly arranged on the outside of the filling layer, and the armor is composed of φ6.0*132 galvanized steel wires resistant to seawater corrosion.

[0012] Preferably, the optical cable is fixedly arranged on the inner side of the filling layer, the optical cable is fixedly arranged inside the rubber-coated cloth bag, and the optical cable is wrapped by the filling layer.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The anti-water-tree cross-linked polyethylene insulated optical fiber composite wet submarine cable has a copper monofilament elongation of 30-35% and a resistivity of ≤0.017241Ω·mm² / m through the installation of the main body. A semi-conductive seawater-resistant water-blocking tape is longitudinally wrapped between each layer of the conductor, and a water-blocking yarn is tied outside the water-blocking tape. The outer layer of the twisted conductor is wrapped with a reverse semi-conductive water-resistant binding tape and a semi-conductive terylone tape. The water-blocking layer of the semi-conductive water-resistant binding tape faces the conductor. The overlapping parts of the two layers of semi-conductive tapes shall not overlap in the same position. The semi-conductive tape is required to be wrapped flat and overlapped evenly, and the overlap rate is controlled at 20-35%. The insulation layer adopts XLPE insulation material with a thickness of 24.0mm. It can still operate normally under the influence of seawater. The lead sheath is 4.0mm thick + the semi-conductive PE sheath is 4.0mm thick. It has excellent waterproof performance and electrical performance, and can be connected to the armored steel wire for grounding.

[0015] 2. The anti-water tree cross-linked polyethylene insulated optical fiber composite wet submarine cable is installed with auxiliary mechanisms. The inner and outer layers are made of strong PP ropes and asphalt anti-corrosion. The armor is composed of φ6.0*132 galvanized steel wires resistant to seawater corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the partial cross-section structure of the utility model.

[0020] In the figure: 1. Main structure; 101. Water-blocking conductor; 102. Conductor shielding; 103. Insulation layer; 104. Insulation shielding; 105. Semi-conductive water-blocking buffer tape; 106. Copper wire shielding; 107. BDPE protective cover; 108. Filling layer; 109. Rubber-coated cloth bag; 110. Lining layer; 2. Auxiliary structure; 201. Steel wire armor; 202. Outer layer; 203. Optical cable. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 The utility model provides a technical solution: an anti-water tree cross-linked polyethylene insulated optical fiber composite wet submarine cable, comprising a main body 1 and an auxiliary body 2, wherein the auxiliary body 2 is located inside the main body 1, and the main body 1 comprises a water-blocking conductor 101, a conductor shield 102 and an insulating layer 103, wherein the conductor shield 102 is fixedly arranged on the outside of the water-blocking conductor 101, and the insulating layer 103 is fixedly arranged on the outside of the conductor shield 102; the main body 1 also comprises an insulating shield 104, a semi-conductive water-blocking buffer tape 105, a copper wire shield 106, a BDPE protective sleeve 107, and a filling Layer 108, rubber-coated cloth bag 109 and lining layer 110, the insulating shield 104 is fixedly arranged on the outside of the insulating shield 103, the semi-conductive water-resistance buffer tape 105 is fixedly arranged on the outside of the insulating shield 104, the copper wire shield 106 is fixedly arranged on the outside of the semi-conductive water-resistance buffer tape 105, the BDPE protective sleeve 107 is fixedly arranged on the outside of the copper wire shield 106, the filling layer 108 is fixedly arranged on the outside of the BDPE protective sleeve 107, the rubber-coated cloth bag 109 is fixedly arranged on the outside of the filling layer 108, and the inner lining layer 110 is fixedly arranged on the outside of the rubber-coated cloth bag 109.

[0023] The auxiliary mechanism 2 includes a steel wire armor 201, an outer layer 202 and an optical cable 203. The steel wire armor 201 is fixedly arranged on the outside of the inner lining layer 110, the outer layer 202 is fixedly arranged on the outside of the steel wire armor 201, the outer layer 202 is fixedly arranged on the outside of the filling layer 108, the optical cable 203 is fixedly arranged on the inside of the filling layer 108, and the optical cable 203 is fixedly arranged inside the rubber-coated cloth bag 109. When using the anti-water tree cross-linked polyethylene insulated optical fiber composite wet submarine cable and production equipment, the elongation of the copper single wire is controlled at 30-35%, and the resistivity is ≤0.017241Ω·mm² / m. A layer of semi-conductive seawater-resistant water-blocking tape is longitudinally wrapped between each layer of the conductor, and a water-blocking yarn is tied outside the water-blocking tape. The outer layer of the twisted conductor is wrapped with a layer of reverse semi-conductive water-blocking binding tape and a layer of semi-conductive terephthalate tape. The water-blocking layer of the semi-conductive water-blocking binding tape faces the conductor. The overlapping parts of the two layers of semi-conductive tapes shall not overlap in the same position. The semi-conductive tape is required to be wrapped flat and overlap evenly, and the overlap rate is controlled at 20~35%. The insulating layer 103 adopts XLPE insulating material with a thickness of 24.0mm. It can still operate normally under the influence of seawater. The lead sheath is 4.0mm thick + the semi-conductive PE sheath is 4.0mm thick, with excellent waterproof performance and excellent electrical performance. It can be connected to the armored steel wire for grounding. The inner and outer layers are made of strong PP rope and asphalt anti-corrosion. The armor is composed of φ6.0*132 galvanized steel wires resistant to seawater corrosion.

[0024] Working principle: When using anti-water-tree cross-linked polyethylene insulated optical fiber composite wet submarine cable, the elongation of copper monofilament is controlled at 30~35%, the resistivity is ≤0.017241Ω·mm² / m, a semi-conductive seawater-resistant water-blocking tape is longitudinally wrapped between each layer of conductor, a water-blocking yarn is tied outside the water-blocking tape, and a reverse semi-conductive water-blocking tape and a semi-conductive terylone tape are wrapped around the outer layer of the twisted conductor. The water-blocking layer of the semi-conductive water-blocking tape faces the conductor, and the overlapping parts of the two layers of semi-conductive tapes shall not overlap at the same position. The semi-conductive tape requires smooth wrapping and uniform overlap, with an overlap rate controlled at 20~35%. The insulating layer 103 uses XLPE insulating material with a thickness of 24.0mm. It can still operate normally under the influence of seawater. The lead sheath is 4.0mm thick + the semi-conductive PE sheath is 4.0mm thick. It has excellent waterproof performance and excellent electrical performance. It can be connected to the armored steel wire for grounding. The inner and outer layers are made of strong PP rope and asphalt anti-corrosion. The armor is composed of φ6.0*132 galvanized steel wires resistant to seawater corrosion.

[0025] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable, comprising a main mechanism (1) and an auxiliary mechanism (2), characterized in that: The auxiliary mechanism (2) is located on the inner side of the main mechanism (1); the main mechanism (1) comprises a water-blocking conductor (101), a conductor shield (102) and an insulating layer (103); the conductor shield (102) is fixedly arranged on the outer side of the water-blocking conductor (101); and the insulating layer (103) is fixedly arranged on the outer side of the conductor shield (102); The main body structure (1) further comprises an insulating shield (104), a semi-conductive water-resistance buffer tape (105), a copper wire shield (106), a BDPE protective sleeve (107), a filling layer (108), a rubber-coated cloth bag (109) and an inner lining layer (110); the insulating shield (104) is fixedly arranged on the outside of the insulating layer (103).

2. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 1, characterized in that: The semi-water-conducting buffer belt (105) is fixedly arranged on the outside of the insulating shield (104), and the copper wire shield (106) is fixedly arranged on the outside of the semi-water-conducting buffer belt (105).

3. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 2, characterized in that: The BDPE protective sleeve (107) is fixedly arranged on the outside of the copper wire shield (106), and the filling layer (108) is fixedly arranged on the outside of the BDPE protective sleeve (107).

4. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 3, characterized in that: The rubber-coated cloth bag (109) is fixedly arranged on the outside of the filling layer (108), and the lining layer (110) is fixedly arranged on the outside of the rubber-coated cloth bag (109).

5. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 4, characterized in that: The auxiliary mechanism (2) comprises a steel wire armor (201), an outer coating (202) and an optical cable (203); the steel wire armor (201) is fixedly arranged on the outside of the inner lining layer (110).

6. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 5, characterized in that: The outer layer (202) is fixedly arranged on the outside of the steel wire armor (201), and the outer layer (202) is fixedly arranged on the outside of the filling layer (108).

7. The water-tree resistant cross-linked polyethylene insulated optical fiber composite wet submarine cable according to claim 6, characterized in that: The optical cable (203) is fixedly arranged on the inner side of the filling layer (108), and the optical cable (203) is fixedly arranged inside the rubber-coated cloth bag (109).

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