CN201113371Y - Submarine fiber optic composite power cable splice box - Google Patents

Abstract

The utility model relates to a submarine optical fiber composite power cable terminal box, in particular to a submarine optical fiber composite power cable connection device. A special terminal box, which is suitable for the connection of a submarine optical fiber composite power cable, comprises a bending limiter, an external cone, an internal cone, an external drum body, a force bearing nut, optical fiber unit sealing holder bodies, a fiber storing disc, an optical fiber unit sealing drum, optical unit clamps, a connecting duct, reinforced wrapped insulator, a lead pipe and a heat shrinkable sleeve, wherein the fiber storing disc is connected between the two optical fiber unit sealing holder bodies through a locating shaft; the optical fiber unit sealing holder bodies are connected with the optical unit through the optical unit clamps; a cable conductor is in crimp connection through the connecting duct; a cable joint insulator is connected through the reinforced wrapped insulator; a cable metal duct is welded through the lead pipe; a cable metal oversheath is connected through the heat shrinkable sleeve; the external cone and the internal cone clamp an armoring steel wire through a connecting bolt; the external drum body is fixed on the internal cone; and the bending limiter is fixed on the external cone.

Description

Submarine fiber optic composite power cable splice box

technical field

The utility model relates to a joint box for submarine optical fiber composite power cables, which relates to a connection device for submarine optical fiber composite power cables, which is a special joint box suitable for connecting submarine optical fiber composite power cables.

Background technique

Submarine optical fiber composite power cables are mainly used for interconnection between islands and mainland or between islands, between land and offshore oil platforms, and between offshore oil platforms, while meeting the needs of power transmission and optical fiber communication. Due to the particularity of submarine geology and hydrology, the laying and operating conditions of submarine optical fiber composite power cables are quite different from those of land cables. When the submarine optical fiber composite power cable is laid or maintained, due to the water pressure, the weight of the cable and the mechanical action during laying, the cable will be subjected to great mechanical stress (stretching, twisting, bending). In addition, the submarine optical fiber composite power cable Operating in a complex seabed environment will also be eroded and corroded by corrosive substances and underwater organisms, and even damaged by mechanical forces such as ship anchoring and fishing operations. Therefore, submarine optical fiber composite power cables have higher Mechanical properties and strong corrosion resistance.

Contents of the invention

The purpose of this utility model is to provide a submarine optical fiber composite power cable joint box for the above shortcomings, which is mainly used for the connection of submarine optical fiber composite power cables between land and sea islands or intermediate nodes of links, and can realize the connection of submarine power systems and communication systems .

The submarine optical fiber composite power cable splice box is realized by the following schemes:

The structure of the submarine optical fiber composite power cable splice box includes a bending limiter, an outer cone, an inner cone, an outer cylinder, a bearing nut, an optical fiber unit sealing seat, a fiber storage tray, an optical fiber unit sealing cylinder, an optical unit clamp, a connecting conduit, an Wrap insulators, lead pipes, heat shrink tubing.

The fiber storage tray is connected in the middle of the sealing bases of the two optical fiber units through the positioning shaft; the sealing base of the optical fiber unit is connected with the optical unit through the optical unit clamp, and the optical unit clamp is a two semicircular open-close type (Huff type) clamping structure; The sealing cylinder of the optical fiber unit is connected with the sealing seat through the bearing nut; the connection of the cable conductor is crimped through the connecting guide; the connection of the cable joint insulator is connected through the winding insulator; The metal outer sheath is connected by a heat-shrinkable sleeve; the outer cone and the inner cone clamp the armored steel wire through connecting bolts; the outer cylinder is fixed on the inner cone; the bending limiter is fixed on the outer cone.

The connection process of the submarine optical fiber composite power cable splice box is realized as follows:

1. Stripping the outer sheath and outer armored steel wire of the submarine optical fiber composite power cable;

2. Connection of cable joints: a. Connection of cable conductors: Using crimping process, put the connecting conduit on the conductors for crimping to ensure the connection of cable conductors. b. Cable insulation connection recovery: The connection of the cable joint insulator is wrapped with insulating tape, semi-conductive shielding tape and stress relief tape. When making the joint, the tape is wrapped in a stretched state, and the residual tension of the tape is After wrapping, it becomes the pressure between the tape layers, and after wrapping, it is bonded into one body to form an augmented winding insulator. c. Restoration of the cable lead sheath: put the lead tube on the cable lead sheath, compress the lead tube, remove the oxide layer on the surface, and weld the lead tube on the cable metal sheath to ensure the continuity and sealing performance of the metal sheath , and then fill the metal sheath welding joints with lead for enhanced protection. d. Restoration of the cable outer sheath: Heat and shrink the heat shrinkable sleeve outside the recovered lead pipe to ensure the continuity and sealing of the cable outer sheath.

3. Optical unit connection: a. Seal the optical fiber unit with the optical fiber unit sealing seat, and fix the optical fiber unit with the optical unit clamp; b. Connect the optical fiber unit sealing seat with the fiber storage tray, and weld the optical fiber; c. Put the sealing cylinder Connect with bearing nut and seal seat.

4. Tighten the outer cone and inner cone with bolts to ensure the mechanical properties of the submarine optical fiber composite power cable joint box. Fix the outer cylinder on the inner cone, and pour asphalt into the outer cylinder.

5. Fix the bending limiter on the outer cone seat to ensure the bending performance of the joint between the submarine optical fiber composite power cable and the splice box.

Features of the present invention:

Submarine optical fiber composite power cable joint box is suitable for submarine optical fiber composite power cables. The structure adopts a rigid structure. The cable joint part and the optical fiber joint part can withstand the pressure of 300m water depth. The material selection is stainless steel 316L with good seawater corrosion resistance. According to the actual use in the past, a conical rubber bending limiter is designed at the armored terminal of the cable at both ends of the outer shell, which can effectively prevent the excessive bending of the cable at the armored terminal when the external force is applied; in addition, The tapered rubber sheath is made of seawater-resistant rubber material, and a metal insert is installed inside, which not only ensures the service life but also ensures the strength.

The steel wire clamping principle adopts the wedge clamping mechanism to ensure the mechanical performance of the submarine optical fiber composite power cable. The optical fiber unit connection sealing structure is designed with the submarine optical cable splice box connection sealing structure. The optical unit fixing fixture is added in the sealing protection seat, thus ensuring the mechanical performance of the optical fiber unit and making the local structure more compact. The cable joint part adopts the cable wrapping joint technology, which does not increase the partial discharge of the cable joint, thus ensuring the convenience and quickness of on-site construction and installation. The submarine optical fiber composite power cable splice box can be assembled on the cable laying ship, and can meet the construction requirements of laying and salvage operations on the existing cable laying ship.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is a schematic diagram of a cable joint of a submarine optical fiber composite power cable joint box.

Fig. 2 is a schematic diagram of the optical unit joint of the submarine optical fiber composite power cable joint box.

Figure 3 is a schematic diagram of the armored structure of the submarine optical fiber composite power cable splice box

Fig. 4 is a schematic structural diagram of a splice box for a submarine optical fiber composite power cable.

Marks in the figure: 1. Bending limiter, 2. Outer cone, 3. Armored steel wire, 4. Inner cone, 5. Outer cylinder, 6. Optical unit, 7. Bearing nut, 8. Fiber unit sealing seat , 9. Fiber storage tray, 10. Optical fiber unit sealing cylinder, 11. Optical unit fixture, 12. Cable outer sheath, 13. Heat shrinkable sleeve, 14. Cable lead sheath, 15. Lead pipe, 16. Connecting conduit , 17, cable conductor, 18, increased winding insulator, 19, cable joint insulator.

Detailed ways

Referring to accompanying drawings 1, 2, 3, and 4, the joint box structure of the submarine optical fiber composite power cable includes a bending limiter 1, an outer cone 2, an armored steel wire 3, an inner cone 4, an outer cylinder 5, an optical unit 6, and a bearing nut 7. Optical fiber unit sealing base 8, fiber storage tray 9, optical fiber unit sealing cylinder 10, optical unit clamp 11, cable outer sheath 12, heat shrinkable sleeve 13, cable lead sheath 14, lead pipe 15, connecting conduit 16 , Cable conductor 17, winding insulator 18, cable joint insulator 19.

Submarine optical fiber composite power cable splice box is connected as follows:

The fiber storage tray 9 is connected in the middle of the two optical fiber unit sealing bases 8 through the positioning shaft; the optical fiber unit sealing base 8 is connected to the optical unit 6 through the optical unit clamp 11; the optical fiber unit sealing cylinder 10 is connected to the sealing base through the bearing nut 7 Body 8 is connected; cable conductor 17 is connected by crimping through connecting conduit 16; cable joint insulator 19 is connected by winding insulator 18; cable lead sheath 14 is connected by lead pipe 15 welding; cable outer sheath 12 is connected by heat-shrinkable sleeve 13; the outer cone 2 and the inner cone 4 clamp the armored steel wire 3 through connecting bolts; the outer cylinder 5 is fixed on the inner cone 4; the bending limiter 1 is fixed on outer cone 2. The connection of the cable joint insulator is wrapped with insulating tape, semi-conductive shielding tape and stress-relief tape wrapping tape, and then bonded into one body after wrapping to form a winding-increasing insulator 18 .

The connection process of submarine optical fiber composite power cable splice box is realized in this way:

1. Stripping the outer sheath and outer armored steel wire of the submarine optical fiber composite power cable;

2. Connection of cable joints: a. Conductor connection: Using crimping process, put the connecting conduit 16 on the cable conductor 17 for crimping to ensure the connection of the conductors. b. Insulation connection recovery: the connection of the cable joint insulator 19 is wrapped with insulating tape, semi-conductive shielding tape and stress relief tape wrapping tape. When making the joint, the tape is wrapped in a stretched state, and the residual tension of the tape is at After wrapping, it becomes the pressure between the tape layers, and after wrapping, they are bonded together to form the augmented winding insulator 18 . c. Restoration of the cable lead sheath: put the lead pipe 15 on the cable lead sheath 14, compress the lead pipe 15, remove the oxide layer on the surface, and weld the contact surface to ensure the continuity and sealing performance of the cable lead sheath 14 , then fill the lead at the lead pipe 15 welding joints, and carry out reinforced protection. d. Restoration of the outer sheath of the cable: Heat and shrink the heat shrinkable sleeve 13 outside the lead pipe 15 to ensure the continuity and tightness of the sheath. The sealing of the cable joint is accomplished by the welding sealing of the lead pipe 15 and the heat-shrinking sealing of the heat-shrinkable sleeve 13.

3. Optical unit connection: a. Seal the optical fiber unit with the optical fiber unit sealing seat 8, and fix the optical fiber unit with the optical unit clamp 11; b. Connect the optical fiber unit sealing seat 8 and the fiber storage tray 9, and weld the optical fiber; c . Connect the sealing cylinder 10 of the optical fiber unit and the bearing nut 7 to the sealing seat 8 . The sealing of the optical unit is accomplished by the "V" shaped sealing ring in the sealing seat 8 of the optical fiber unit and the sealing ring in the sealing cylinder 10 of the optical fiber unit.

4. Tighten the outer cone 2 and the inner cone 4 with bolts to ensure the mechanical properties of the submarine optical fiber composite power cable joint box. The outer cylinder 5 is fixed on the inner cone 4, and asphalt is poured in the outer cylinder 5.

5. Fix the bending limiter 1 on the outer cone 2 to ensure the bending performance of the joint between the submarine optical fiber composite power cable and the splice box.

The connection process construction of submarine optical fiber composite power cable splice box is carried out on site on the construction ship.

Claims (2)

1. A submarine optical fiber composite power cable splice box, characterized in that the structure includes a bending limiter, an outer cone, an inner cone, an outer cylinder, a bearing nut, an optical fiber unit sealing seat, a fiber storage tray, an optical fiber unit sealing cylinder, Optical unit fixtures, connecting conduits, build-up insulators, lead pipes, heat-shrinkable sleeves; The fiber storage tray is connected in the middle of the sealing seat of the two optical fiber units through the positioning shaft; the sealing seat of the optical fiber unit is connected with the optical unit through the optical unit clamp, and the optical unit clamp is a two-semi-circular open-close clamping structure; the sealing cylinder of the optical fiber unit passes through The load-bearing nut is connected with the sealing seat; the cable conductor is connected by crimping through the connecting conduit; the connection of the cable joint insulator is connected by increasing the winding insulator; the connection of the cable metal conduit is welded by lead pipe; the cable metal outer sheath is It is connected by a heat-shrinkable sleeve; the outer cone and the inner cone clamp the armored steel wire through connecting bolts; the outer cylinder is fixed on the inner cone; the bending limiter is fixed on the outer cone. 2. The submarine optical fiber composite power cable splice box according to claim 1, characterized in that the connection of the cable joint insulator is wrapped by insulating tape, semi-conductive shielding tape and stress relief tape wrapping tape, and glued together after wrapping. integrated to form build-up insulators.

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