Extruded insulation submarine cable for direct current power transmission

Abstract

The utility model relates to the technical field of submarine cables, and discloses an extruded insulated submarine cable for direct-current power transmission, which comprises a submarine cable main body, a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a semi-conductive water-blocking buffer strip, a lead sleeve, a PE sheath, a filling strip, an optical unit, a lining layer, a steel wire armor and an outer coating layer, the water-blocking conductor is fixedly arranged in the submarine cable main body, and the conductor shielding layer is fixedly arranged at the outer end of the water-blocking conductor. According to the extruded insulated submarine cable for direct-current power transmission and the optical cable for temperature measurement, an ultramicro design is adopted, the outer diameter is 2.5 + / -0.1 mm, a spiral stainless steel tube and stainless steel wires are woven to form a double-layer armor, the tensile property, the compression resistance and the heat conduction performance are good, the attenuation of a multimode optical fiber under the wavelength of 850 nm is not larger than 3.0 dB / km, the attenuation of the multimode optical fiber under the wavelength of 1300 nm is not larger than 1.5 dB / km, direct-current XLPE is adopted for reducing space charges under the condition of + / -320 kV, the outer diameter is about 168 mm, and the optical cable is suitable for being used as a cable for direct-current power transmission. 76 steel wires phi 6.0 mm, and the lead sheath and the PE sheath are integrated for water resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cables, in particular to an extruded insulated submarine cable for DC power transmission. Background Technique

[0002] A cable is a wire made of one or more mutually insulated conductors and an outer insulating protective layer, which is laid underground, in the air, etc. A cable generally consists of three parts: a conductor, an insulating layer, and a protective layer. There are usually two types: power cables and control cables. Power cables are mainly used for the transmission and distribution of electric energy; control cables are mainly used for lines such as measurement, protection, and control. Cables have the characteristics of conducting electricity inside and being insulated outside.

[0003] The prior art CN203102991U is a DC submarine cable for ±320kV flexible power transmission. The utility model discloses a DC submarine cable for ±320kV flexible power transmission, which includes a water-blocking conductor, a conductor shielding layer, an insulating layer, and an insulating shielding layer arranged in sequence from the inside to the outside. A semiconductive water-blocking tape is wound around the insulating shielding layer, and an alloy lead sheath and a PE sheath are extruded outside the semiconductive water-blocking tape. An inner lining layer, an armor layer, and an outer covering layer are arranged outside the PE sheath. The characteristics are that the materials of the conductor shielding layer and the insulating shielding layer are both DC shielding materials, the material of the insulating layer is DC cross-linked polyethylene, and the thickness of the insulating layer is 20 - 30mm; the advantages are that this flexible DC submarine cable can achieve high-voltage, long-distance large-capacity power transmission, and compared with AC cables of the same voltage level and the same cross-section, its transmission capacity is more than twice that of AC cables. Compared with AC cables, its cost is reduced by more than one-third, and during power transmission, its line loss is small, achieving an energy-saving effect.

[0004] The prior art DC submarine cable for ±320kV flexible power transmission has poor tensile, compressive, and heat-conducting properties during actual use. Content of the Utility Model

[0005] Technical Problem to be Solved: The purpose of the utility model is to provide an extruded insulated submarine cable for DC power transmission to solve the problem of poor tensile, compressive, and heat-conducting properties mentioned in the above background technique.

[0006] Technical solution: To achieve the above object, the utility model provides the following technical solution: An extruded insulated submarine cable for DC transmission, comprising a submarine cable main body, a water-blocking conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a semiconductive water-blocking buffer tape, a lead sheath, a PE sheath, a filling strip, an optical unit, an inner lining layer, a steel wire armor and an outer covering layer. The water-blocking conductor is fixedly arranged inside the submarine cable main body, the conductor shielding layer is fixedly arranged at the outer end of the water-blocking conductor, the insulating layer is fixedly arranged at the outer end of the conductor shielding layer, the insulating shielding layer is fixedly arranged at the outer end of the insulating layer, the semiconductive water-blocking buffer tape is fixedly arranged at the outer end of the insulating shielding layer, the lead sheath is fixedly arranged at the outer end of the semiconductive water-blocking buffer tape, the PE sheath is fixedly arranged at the outer end of the lead sheath, the filling strip is fixedly arranged at the outer end of the PE sheath, the optical unit is fixedly arranged inside the filling strip, the inner lining layer is fixedly arranged at the outer end of the filling strip, the steel wire armor is fixedly arranged at the outer end of the inner lining layer, and the outer covering layer is fixedly arranged at the outer end of the steel wire armor.

[0007] Preferably, it includes a main body mechanism and an auxiliary mechanism. The auxiliary mechanism is located outside the main body mechanism. The main body mechanism includes an equipment main body, a baffle, an electric push rod, a fixed sleeve, a lifting box, a first motor, a threaded rod, a first movable ring, a slider, a fixed frame, a second motor, a rotating shaft, a second movable ring and a cutting knife. The baffle is fixedly installed at the upper end of the equipment main body.

[0008] Preferably, the electric push rod is fixedly installed inside the baffle, the fixed sleeve is fixedly installed at the transmission end of the electric push rod, the lifting box is fixedly installed at the upper end of the equipment main body, the first motor is fixedly installed at the upper end of the lifting box, the threaded rod is fixedly installed at the transmission end of the lower end of the first motor, the first movable ring is fixedly installed inside the lifting box, and the slider is movably installed at the outer end of the threaded rod.

[0009] Preferably, the fixed frame is fixedly installed at the right end of the slider, the second motor is fixedly installed at the front end of the fixed frame, the rotating shaft is fixedly installed at the transmission end of the rear end of the second motor, the second movable ring is fixedly installed inside the fixed frame, and the cutting knife is fixedly installed at the outer side of the rotating shaft.

[0010] Preferably, the auxiliary mechanism includes a moving base, universal wheels, a control panel, an auxiliary tool placement box and a movable door. The moving base is fixedly installed at the lower end of the equipment main body.

[0011] Preferably, the universal wheels are fixedly installed at the lower end of the moving base, the control panel is fixedly installed at the front end of the equipment main body, and the control panel is electrically connected to the electric push rod, the first motor and the second motor.

[0012] Preferably, the auxiliary tool placement box is movably installed inside the device main body, and the movable door is movably installed at the right end of the device main body.

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

[0014] 1. For the extruded insulated submarine cable for DC power transmission, the optical cable for temperature measurement adopts an ultra - micro design with an outer diameter of 2.5 ± 0.1 mm, and is double - armored with a spiral stainless - steel tube and a stainless - steel wire braid, having good tensile, compressive, and heat - conducting properties. The attenuation of the multimode optical fiber should not be greater than 3.0 dB / km at a wavelength of 850 nm and should not be greater than 1.5 dB / km at a wavelength of 1300 nm. For ± 320 kV, DC XLPE is used to reduce space charge, with an outer diameter of about 168 mm, 76 steel wires of φ6.0 mm, and a combined waterproofing of a lead sheath + a PE sheath;

[0015] 2. For the extruded insulated submarine cable for DC power transmission, by installing a baffle, an electric push rod, and a fixed sleeve, the device can fix the submarine cable main body, ensuring the stability of the submarine cable main body during cutting. By installing universal wheels, people can move the device more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 is a three - dimensional structural schematic diagram of the submarine cable main body of the present utility model;

[0018] Figure 3 is a three - dimensional structural schematic diagram of the electric push rod of the present utility model;

[0019] Figure 4 is a three - dimensional structural schematic diagram of the lifting box of the present utility model.

[0020] In the figure: 1. Main body mechanism; 101. Equipment main body; 102. Submarine cable main body; 1021. Water-blocking conductor; 1022. Conductor shielding layer; 1023. Insulation layer; 1024. Insulation shielding layer; 1025. Semiconductor water-blocking buffer strip; 1026. Lead sheath; 1027. PE sheath; 1028. Filler strip; 1029. Optical unit; 10210. Inner lining layer; 10211. Steel wire armor; 10212. Outer covering layer; 103. Baffle; 104. Electric push rod; 105. Fixed sleeve; 106. Lifting box; 107. First motor; 108. Threaded rod; 109. First movable ring; 110. Slide block; 111. Fixed frame; 112. Second motor; 113. Rotating shaft; 114. Second movable ring; 115. Cutting knife; 2. Auxiliary mechanism; 201. Moving base; 202. Universal wheel; 203. Control panel; 204. Auxiliary tool placement box; 205. Movable door. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1 - Figure 4, the present utility model provides a technical solution: an extruded insulated submarine cable for DC transmission, comprising a submarine cable main body 102, a water-blocking conductor 1021, a conductor shielding layer 1022, an insulating layer 1023, an insulation shielding layer 1024, a semiconductive water-blocking buffer tape 1025, a lead sheath 1026, a PE sheath 1027, a filling strip 1028, an optical unit 1029, an inner liner layer 10210, a steel wire armor 10211, and an outer covering layer 10212. The water-blocking conductor 1021 is fixedly arranged inside the submarine cable main body 102, the conductor shielding layer 1022 is fixedly arranged at the outer end of the water-blocking conductor 1021, the insulating layer 1023 is fixedly arranged at the outer end of the conductor shielding layer 1022, the insulation shielding layer 1024 is fixedly arranged at the outer end of the insulating layer 1023, the semiconductive water-blocking buffer tape 1025 is fixedly arranged at the outer end of the insulation shielding layer 1024, the lead sheath 1026 is fixedly arranged at the outer end of the semiconductive water-blocking buffer tape 1025, the PE sheath 1027 is fixedly arranged at the outer end of the lead sheath 1026, the filling strip 1028 is fixedly arranged at the outer end of the PE sheath 1027, the optical unit 1029 is fixedly arranged inside the filling strip 1028, the inner liner layer 10210 is fixedly arranged at the outer end of the filling strip 1028, the steel wire armor 10211 is fixedly arranged at the outer end of the inner liner layer 10210, and the outer covering layer 10212 is fixedly arranged at the outer end of the steel wire armor 10211.

[0023] It includes a main body mechanism 1 and an auxiliary mechanism 2. The auxiliary mechanism 2 is located outside the main body mechanism 1. The main body mechanism 1 includes an equipment main body 101, a baffle 103, an electric push rod 104, a fixed sleeve 105, a lifting box 106, a first motor 107, a threaded rod 108, a first movable ring 109, a slider 110, a fixed frame 111, a second motor 112, a rotating shaft 113, a second movable ring 114 and a cutting knife 115. The baffle 103 is fixedly installed at the upper end of the equipment main body 101. The electric push rod 104 is fixedly installed inside the baffle 103. The fixed sleeve 105 is fixedly installed at the driving end of the electric push rod 104. The lifting box 106 is fixedly installed at the upper end of the equipment main body 101. The first motor 107 is fixedly installed at the upper end of the lifting box 106. The threaded rod 108 is fixedly installed at the driving end of the lower end of the first motor 107. The first movable ring 109 is fixedly installed inside the lifting box 106. The slider 110 is movably installed at the outer end of the threaded rod 108. The fixed frame 111 is fixedly installed at the right end of the slider 110. The second motor 112 is fixedly installed at the front end of the fixed frame 111. The rotating shaft 113 is fixedly installed at the driving end of the rear end of the second motor 112. The second movable ring 114 is fixedly installed inside the fixed frame 111. The cutting knife 115 is fixedly installed outside the rotating shaft 113. When the device needs to be used, place the submarine cable main body 102 on the equipment main body 101. The electric push rod 104 pushes the fixed sleeve 105 forward, so that the device can firmly fix the submarine cable main body 102. When the submarine cable main body 102 needs to be cut during the production process, the first motor 107 drives the threaded rod 108 to rotate, making the slider 110 move downward. The slider 110 is fixedly connected to the fixed frame 111, so that the fixed frame 111 and the components inside the fixed frame 111 move downward, and then the cutting knife 115 moves downward. The second motor 112 drives the rotating shaft 113 to rotate, making the rotating shaft 113 and the cutting knife 115 fixedly connected, and then the cutting knife 115 rotates, and the submarine cable main body 102 can be cut.

[0024] The auxiliary mechanism 2 includes a moving base 201, universal wheels 202, a control panel 203, an auxiliary tool placement box 204, and a movable door 205. The moving base 201 is fixedly installed at the lower end of the device main body 101. The universal wheels 202 are fixedly installed at the lower end of the moving base 201. The control panel 203 is fixedly installed at the front end of the device main body 101. The control panel 203 is electrically connected to the electric push rod 104, the first motor 107, and the second motor 112. The auxiliary tool placement box 204 is movably installed inside the device main body 101. The movable door 205 is movably installed at the right end of the device main body 101. The universal wheels 202 are installed at the lower end of the moving base 201, enabling people to move the device more quickly by rotating the universal wheels 202. The auxiliary tool placement box 204 is movably installed inside the device main body 101, enabling people to place some auxiliary tools in the auxiliary tool placement box 204.

[0025] Working principle: When the device needs to be used, place the submarine cable main body 102 on the device main body 101. The electric push rod 104 pushes the fixed sleeve 105 forward, enabling the device to firmly fix the submarine cable main body 102. When the submarine cable main body 102 needs to be cut during the production process, the first motor 107 drives the threaded rod 108 to rotate, causing the slider 110 to move downward. The slider 110 is fixedly connected to the fixed frame 111, and thus the fixed frame 111 and the components inside the fixed frame 111 move downward, and further the cutting knife 115 moves downward. The second motor 112 drives the rotating shaft 113 to rotate, causing the rotating shaft 113 to be fixedly connected to the cutting knife 115, and further causing the cutting knife 115 to rotate, so as to cut the submarine cable main body 102. The universal wheels 202 are installed at the lower end of the moving base 201, enabling people to move the device more quickly by rotating the universal wheels 202. The auxiliary tool placement box 204 is movably installed inside the device main body 101, enabling people to place some auxiliary tools in the auxiliary tool placement box 204.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than limiting the protection scope of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. Extruded insulated submarine cable for direct current transmission, characterized in that: The invention comprises a submarine cable body (102), a water-blocking conductor (1021), a conductor shielding layer (1022), an insulating layer (1023), an insulating shielding layer (1024), a semiconductor water-blocking buffer tape (1025), a lead sheath (1026), a PE sheath (1027), a filling strip (1028), an optical unit (1029), an inner lining layer (10210), a steel wire armor (10211) and an outer covering layer (10212), wherein the water-blocking conductor (1021) is fixedly arranged inside the submarine cable body (102), the conductor shielding layer (1022) is fixedly arranged at the outer end of the water-blocking conductor (1021), the insulating layer (1023) is fixedly arranged at the outer end of the conductor shielding layer (1022), and the insulating shielding layer (1024) is fixedly arranged at the outer end of the insulating layer (1024). The outer end of the insulating layer (1023), the semi-conductive water-resistant buffer belt (1025) is fixedly arranged on the outer end of the insulating shielding layer (1024), the lead sleeve (1026) is fixedly arranged on the outer end of the semi-conductive water-resistant buffer belt (1025), the PE sheath (1027) is fixedly arranged on the outer end of the lead sleeve (1026), the filling strip (1028) is fixedly arranged on the outer end of the PE sheath (1027), the optical unit (1029) is fixedly arranged inside the filling strip (1028), the inner lining layer (10210) is fixedly arranged on the outer end of the filling strip (1028), the steel wire armor (10211) is fixedly arranged on the outer end of the inner lining layer (10210), and the outer coating layer (10212) is fixedly arranged on the outer end of the steel wire armor (10211).

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