A submarine optical cable junction box

Abstract

The present invention discloses a submarine optical cable junction box, comprising a cylinder, both ends of the cylinder are connected with a joint device, the joint device comprises a first end cover, both ends of the first end cover are connected with a limiter, the first end cover is provided with a first accommodating chamber for accommodating a submarine optical cable, the first accommodating chamber comprises a circular hole and a tapered hole connected, both ends of the circular hole are provided with a tapered hole, the tapered hole is connected with a first trapezoidal sealing ring, the limiter is provided with a second accommodating chamber for accommodating a submarine optical cable, the second accommodating chamber is a tapered chamber, the second accommodating chamber is connected with the first accommodating chamber, an electrical component is connected inside the cylinder, a sensor is connected to the cylinder, and the sensor and the electrical component are electrically connected. The present invention improves the connection reliability of the submarine optical cable and can conveniently and quickly collect and monitor marine information data.

Description

Technical Field

[0001] The present invention relates to the field of marine communication technology, and in particular to a submarine optical cable junction box. Background Art

[0002] More than 90% of the world's international data is transmitted via submarine optical cables, making submarine optical cables the most important information carrier for contemporary global information communications. In order to achieve long-distance ocean communications, a junction box is needed to connect two sections of optical cables to extend the length of the cable. A submarine optical cable with a length of millions of kilometers generally includes thousands of junction boxes. Existing submarine optical cable junction boxes can only perform relay connection of optical cables, and their connection reliability is poor, and it is not convenient to collect and monitor information data such as ocean temperature, pressure, and seismic acceleration. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a submarine optical cable junction box, which can effectively improve the connection reliability of the submarine optical cable and can conveniently and quickly collect and monitor marine information data.

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] A submarine optical cable junction box comprises a cylinder, both ends of the cylinder are connected with a coupling device, the coupling device comprises a first end cover, the first end cover is connected with a limiting member, the first end cover is provided with a first accommodating chamber for accommodating the submarine optical cable, the first accommodating chamber comprises a circular hole and a tapered hole connected to each other, both ends of the circular hole are provided with the tapered holes, the tapered holes are connected with a first trapezoidal sealing ring, the limiting member is provided with a second accommodating chamber for accommodating the submarine optical cable, the second accommodating chamber is a tapered chamber, the second accommodating chamber is connected with the first accommodating chamber, an electrical component is connected inside the cylinder, a sensor is connected to the cylinder, and the sensor is electrically connected to the electrical component.

[0006] In one embodiment, the submarine optical cable includes a sheath, which is sleeved in the second accommodating cavity, a conductive tube is arranged inside the sheath, an optical fiber is arranged inside the conductive tube, an insulating layer is arranged between the conductive tube and the sheath, the outer wall and the inner wall of the sheath are both conical, an arc-shaped groove is arranged on the outer wall of the sheath, and an armored steel wire is clamped in the arc-shaped groove.

[0007] In one embodiment, the sheath includes a first sheath and a second sheath, the second sheath is sleeved inside the first sheath, the first sheath is sleeved in the second accommodating cavity, the insulating layer is arranged between the conductive tube and the second sheath, the outer wall and the inner wall of the first sheath are both conical, the outer wall and the inner wall of the second sheath are both conical, the outer walls of the first sheath and the second sheath are both provided with the arc-shaped groove, and the armored steel wire is clamped in the arc-shaped groove.

[0008] In one embodiment, the first end cover is sleeved inside the cylinder, and a sealing assembly is connected between the outer wall of the first end cover and the cylinder.

[0009] In one embodiment, the sealing assembly includes an O-ring and a second trapezoidal sealing ring, and a first sealing groove and a second sealing groove are provided on the outer wall of the first end cover. The O-ring is clamped in the first sealing groove, and the second trapezoidal sealing ring is clamped in the second sealing groove.

[0010] In one embodiment, the first end cover is connected to a locking nut through a thread, an outer gasket is connected between the locking nut and the second trapezoidal sealing ring, and the locking nut is used to press the outer gasket against the second trapezoidal sealing ring.

[0011] In one embodiment, the coupling device further includes an anti-bending device, which includes a second end cover, the second end cover and the cylinder are connected by threads, a rubber body is provided on the second end cover, and through holes for accommodating the submarine optical cable are provided inside the second end cover and the rubber body, the through holes are communicated with the second accommodating cavity, and the first end cover and the limiter are both located inside the second end cover.

[0012] In one embodiment, a support member is connected inside the cylinder, one end of the support member is connected to the first end cover on one side of the cylinder, and the other end of the support member is connected to the first end cover on the other side of the cylinder.

[0013] In one embodiment, the support member is arc-shaped, and a first support platform and a second support platform are disposed inside the support member, and the first support platform and the second support platform have different heights.

[0014] In one embodiment, the first end cover and the limiting member are connected via threads.

[0015] The present invention has the following beneficial effects: the submarine optical cable junction box of the present invention improves the sealing reliability of the submarine optical cable, can effectively protect the internal electrical components, thereby improving the connection reliability of the submarine optical cable; in addition, through the coordinated installation of sensors and electrical components, the submarine optical cable structure has both the functions of relay and information collection, and can conveniently and quickly collect ocean information data, and transmit the collected ocean information data in real time, thereby realizing the intelligence of the submarine optical cable and facilitating long-term monitoring of real-time ocean climate quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the submarine optical cable junction box of the present invention;

[0017] Figure 2 yes Figure 1 Sectional view in the AA direction;

[0018] Figure 3 yes Figure 2 A schematic diagram of the assembly of the middle cylinder and the first end cover;

[0019] Figure 4 yes Figure 2 Schematic diagram of the assembly of the first end cover, the stopper and the submarine optical cable;

[0020] Figure 5 yes Figure 2 Schematic diagram of the end face of submarine optical cable;

[0021] Figure 6 yes Figure 2 Schematic diagram of the structure of the middle bending device;

[0022] Figure 7 yes Figure 2 A schematic diagram of the structure of the middle support member;

[0023] Figure 8 yes Figure 7 Cross-sectional view in the BB direction;

[0024] In the figure: 1, cylinder, 2, first end cover, 21, first accommodating chamber, 211, circular hole, 212, conical hole, 3, limiter, 31, second accommodating chamber, 4, first trapezoidal sealing ring, 5, electrical component, 51, switch, 52, fiber tray box, 53, power supply, 54, optical amplifier, 6, sensor, 7, submarine optical cable, 71, sheath, 711, first sleeve, 712, second sleeve, 72, insulating layer, 73, conductive tube, 74, optical fiber, 75, armored steel wire, 8, O-ring, 9, second trapezoidal sealing ring, 10, outer gasket, 11, locking nut, 12, inner gasket, 13, locking ring, 14, anti-bending device, 141, second end cover, 142, rubber body, 143, through hole, 15, support member, 151, first support platform, 152, second support platform, 16, fixing ring. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] like Figure 1-Figure 2 As shown, the present embodiment discloses a submarine optical cable junction box, comprising a cylinder 1, both ends of the cylinder 1 are connected with a coupling device, the coupling device comprises a first end cover 2, the first end cover 2 is connected with a limiting member 3, the first end cover 2 is provided with a first accommodating chamber 31 for accommodating a submarine optical cable 7, the first accommodating chamber 31 comprises a circular hole 211 and a tapered hole 212 which are connected, both ends of the circular hole 211 are provided with a tapered hole 212, the tapered hole 212 is connected with a first trapezoidal sealing ring 4, the limiting member 3 is provided with a second accommodating chamber 31 for accommodating a submarine optical cable 7, the second accommodating chamber 31 is a tapered chamber, the second accommodating chamber 31 is connected with the first accommodating chamber 21, the interior of the cylinder 1 is connected with an electrical component 5, the cylinder 1 is connected with a sensor 6, and the sensor 6 is electrically connected to the electrical component 5.

[0027] Among them, sensor 6 is used to collect and monitor ocean information data. Sensor 6 can be a temperature sensor, a pressure sensor or an acceleration sensor to collect sea temperature, pressure and seismic acceleration data in real time, so as to facilitate people to analyze ocean climate changes such as sea level rise, ocean warming, tsunamis and earthquakes, and make tsunami warnings, earthquake warnings, etc. based on the analysis results.

[0028] The joining device is used to join two sections of submarine optical cables 7, so that the submarine optical cables 7 joined by the joining devices at both ends of the cylinder 1 can be relayed, thereby achieving the extension of the optical cable.

[0029] like Figure 3-Figure 4As shown, the first accommodating cavity 21 is provided with tapered holes 212 at both ends of the circular hole 211, and the tapered holes 212 are connected with the first trapezoidal sealing ring 4. When in use, the submarine optical cable 7 with the armored steel wire stripped passes through the first trapezoidal sealing ring 4, the circular hole 211 and another first trapezoidal sealing ring 4 in sequence. The tapered hole 212 can be used to wedge the first trapezoidal sealing ring 4 on the optical cable, thereby improving the sealing and waterproof performance. In addition, tapered holes 212 are provided at both ends of the circular hole 211, thereby forming two wedge-tightening sealing structures, so that when the optical cable is subjected to force in any direction at both ends, it can ensure that one wedge-tightening sealing structure is pulled tighter and tighter, thereby further improving the sealing reliability.

[0030] Furthermore, the tapered holes 212 at both ends of the circular hole 211 are arranged symmetrically to form two symmetrical wedge-tight sealing structures, which are more conducive to improving the sealing effect and enhancing the waterproof sealing performance.

[0031] like Figure 4 As shown, the second accommodating cavity 31 is a conical cavity, which can play a wedge-shaped pressing role on the submarine optical cable 7 passing through it, thereby improving the connection reliability between the submarine optical cable 7 and the limiting member 3 and enhancing the joint tightness between the two.

[0032] In one embodiment, the sensor 6 and the cylinder 1 are connected by bolts, the sensor 6 is located outside the cylinder 1, and is connected to the electrical component 5 inside the cylinder 1 through a wire, so that the information collected by the sensor 6 is directly transmitted to the submarine optical cable 7 through a loop, realizing the intelligence of the submarine optical cable 7, thereby real-time monitoring of the temperature, pressure and other information of the sea area outside the cylinder 1. It can be understood that the above-mentioned sensor 6 itself has high water tightness and pressure resistance.

[0033] like Figure 2 and Figure 8 As shown, the electrical assembly 5 includes a switch 51, a fiber coil box 52, a power supply 53, an optical amplifier 54 and a collection board (not shown in the figure), the sensor 6 is electrically connected to the collection board, the collection board is connected to the switch 51, the submarine optical cables 7 connected by the connecting devices at both ends of the cylinder 1 are electrically connected to the switch 51, and an optical amplifier 54 is also connected between the submarine optical cables 7 at both ends to amplify the optical signal, and the power supply 53 is used to supply power to the optical amplifier 54 and the collection board. The fiber coil box 52 is used to coil and store the submarine optical cables 7.

[0034] like Figure 4-Figure 5 As shown, the above-mentioned submarine optical cable 7 includes a sheath 71, which is sleeved in the second accommodating cavity 31. A conductive tube 73 is arranged inside the sheath 71, and an optical fiber 74 is arranged inside the conductive tube 73. An insulating layer 72 is arranged between the conductive tube 73 and the sheath 71. The outer wall and the inner wall of the sheath 71 are both tapered. An arc-shaped groove is arranged on the outer wall of the sheath 71, and an armored steel wire 75 is clamped in the arc-shaped groove to improve the connection stability and force balance.

[0035] The conductive tube 73 may be a copper tube.

[0036] Furthermore, a plurality of arc-shaped grooves are arranged on the outer wall of the sheath 71, and the plurality of arc-shaped grooves are evenly distributed in the circumferential direction.

[0037] The outer wall of the sheath 71 is tapered to better match with the tapered second accommodating cavity 31 , thereby realizing a wedge-shaped compression structure and improving the connection reliability between the submarine optical cable 7 and the second accommodating cavity 31 .

[0038] In one embodiment, if Figure 4 and Figure 5 As shown, the sheath 71 includes a first sleeve body 711 and a second sleeve body 712, the second sleeve body 712 is sleeved inside the first sleeve body 711, the first sleeve body 711 is sleeved in the second accommodating cavity 31, an insulating layer 72 is arranged between the conductive tube 73 and the second sleeve body 712, the outer wall and the inner wall of the first sleeve body 711 are both conical, the outer wall and the inner wall of the second sleeve body 712 are both conical, arc-shaped grooves are arranged on the outer walls of the first sleeve body 711 and the second sleeve body 712, and armored steel wires 75 are clamped in the arc-shaped grooves, that is, armored steel wires 75 are arranged between the first sleeve body 711 and the second sleeve body 712 and on the outer wall of the first sleeve body 711, thereby forming two layers of armored steel wires to improve the tensile strength of the optical cable. The optical cable of this structure can withstand a tensile force greater than or equal to 90% of the tensile load of the optical cable at break.

[0039] In one embodiment, the first end cover 2 is sleeved inside the cylinder 1 , and a sealing assembly is connected between the outer wall of the first end cover 2 and the cylinder 1 .

[0040] Furthermore, the sealing assembly includes an O-ring 8 and a second trapezoidal sealing ring 9. A first sealing groove and a second sealing groove are provided on the outer wall of the first end cover 2. The O-ring 8 is clamped in the first sealing groove, and the second trapezoidal sealing ring 9 is clamped in the second sealing groove. The two sealing structures of the O-ring 8 and the second trapezoidal sealing ring 9 enhance the sealing reliability between the first end cover 2 and the cylinder body 1, and play a better sealing and waterproof role, thereby providing good protection for the electrical components 5 inside the cylinder body 1, so that the electrical components 5 can maintain normal operation in the deep sea.

[0041] In one embodiment, the first end cover 2 is connected to a locking nut 11 through a thread, and an outer gasket 10 is connected between the locking nut 11 and the second trapezoidal sealing ring 9. The locking nut 11 is used to press the outer gasket 10 against the second trapezoidal sealing ring 9 to compress the second trapezoidal sealing ring 9, maintain the pressure on the second trapezoidal sealing ring 9, and improve the sealing effect. In addition, the locking nut 11 is also used to facilitate improving the tightness of the connection between the first end cover 2 and the cylinder 1.

[0042] In one embodiment, on a first end cover 2, a locking ring 13 is connected to the conical hole 212 away from the limit member 3, and an inner gasket 12 is connected between the locking ring 13 and the first trapezoidal sealing ring 4 inside the conical hole 212. The locking ring 13 is used to press the inner gasket 12 against the first trapezoidal sealing ring 4 to compress the first trapezoidal sealing ring 4, maintain the pressure on the first trapezoidal sealing ring 4, and improve the sealing effect; the first trapezoidal sealing ring 4 inside the conical hole 212 close to the limit member 3 is pressed against the limit member 3.

[0043] In one embodiment, the joint device further includes a bending resistor 14 to protect the connection between the submarine optical cable 7 and the cylinder 1 from excessive bending. Figure 6 As shown, the anti-bending device 14 includes a second end cover 141, the second end cover 141 and the cylinder 1 are connected by threads, a rubber body 142 is arranged on the second end cover 141, and the second end cover 141 and the rubber body 142 are both provided with through holes 143 for accommodating the submarine optical cable 7, the through holes 143 are both connected to the second accommodating cavity 31, and the first end cover 2 and the limiter 3 are both located inside the second end cover 141.

[0044] The anti-bending device 14 is a combination of flexibility and rigidity. One end is rigidly connected to the cylinder 1 through a thread, and the other end is an elastic rubber body 142, which improves the anti-bending effect on the internal optical cable.

[0045] Furthermore, the rubber body 142 is vulcanized on the second end cover 2 to form a vulcanized integrated structure.

[0046] In one embodiment, if Figure 2 , Figure 7 and Figure 8 As shown, a support member 15 is connected to the interior of the cylinder 1 , one end of the support member 15 is connected to the first end cover 2 on one side of the cylinder 1 , and the other end of the support member 15 is connected to the first end cover 2 on the other side of the cylinder 1 .

[0047] In one embodiment, both ends of the support member 15 are connected to a fixing ring 16, the fixing ring 16 at one end of the support member 15 and the first end cover 2 on one side of the cylinder 1 are connected by screws, and the fixing ring 16 at the other end of the support member 15 and the first end cover 2 on the other side of the cylinder 1 are also connected by screws, so as to improve the connection stability of the support member 15 and enhance its ability to resist vibration and impact.

[0048] Furthermore, the support member 15 is arc-shaped to improve heat dissipation and vibration and impact resistance; a first support platform 151 and a second support platform 152 are provided inside the support member 15. Figure 8 As shown, the first support platform 151 and the second support platform 152 have different heights to facilitate the connection of electrical components at different heights.

[0049] Preferably, the support member 15 is in a semicircular arc shape.

[0050] In one of the embodiments, the first end cap 2 and the limiter 3 are connected by threads, which can ensure the sealing effect on one hand and facilitate the adjustment of the screwing depth of the two on the other hand, thereby adjusting the wedge-shaped pressing effect of the limiter 3 on the internal optical cable and the pressing effect on the first trapezoidal sealing ring 4 on one side.

[0051] In one embodiment, the cylinder 1 is cylindrical, has good pressure resistance, and has good heat dissipation ability. The cylinder wall thickness can be calculated according to the seawater depth to match the pressure requirements of different sea depths. The material of the cylinder 1 can be 2507 / 316L / Ti, and the two ends of the cylinder 1 are provided with a finely finished surface with a roughness of Ra0.8, which is used as the sealing surface of the O-ring 8.

[0052] When the submarine optical cable junction box of this embodiment is used, Figure 2 As shown, the first section of the submarine optical cable 7 is passed through the joint device at one end of the cylinder 1, that is, the submarine optical cable 7 of this section is passed through the through hole 143 inside the rubber body 142 in the anti-bending device 14, the through hole 143 on the second end cover 141, the second accommodating cavity 31 on the stopper 3, and the first accommodating cavity 21 on the first end cover 2 in sequence, wherein the second accommodating cavity 31 and the submarine optical cable 7 are mechanically pressed when connected, and the armored steel wire 75 of the submarine optical cable 7 is pushed by the 20Mpa hydraulic device, so that the tapered sheath 71 is wedged tightly with the tapered sheath 71. In the second accommodating chamber 31, mechanical pressing is performed by a mechanical hydraulic device, thereby improving the connection reliability between the submarine optical cable 7 and the limiter 3; the submarine optical cable 7 in the first accommodating chamber 21 is the cable body after the sheath 71 and the armored steel wire 75 are stripped, and the cable body passes through the circular hole 211 and the tapered hole 212 in the first accommodating chamber 21 at the same time; similarly, the second section of the submarine optical cable 7 is passed through the coupling device at the other end of the cylinder 1, thereby realizing the relay connection of the first section of the submarine optical cable and the second section of the submarine optical cable at both ends, thereby extending the communication transmission distance.

[0053] The submarine optical cable junction box of this embodiment performs regional pressing and sealing of the submarine optical cable 7 through the tapered hole 212 of the first accommodating chamber 21 and the tapered second accommodating chamber 31, which greatly improves the sealing reliability and pressure resistance of the submarine optical cable 7, can effectively protect the internal electrical components 5, and ensure the normal operation of the internal electrical components 5, thereby improving the connection reliability of the submarine optical cable 7, so that the submarine optical cable 7 can also ensure the transmission reliability in the deep sea. In addition, through the coordinated installation of the sensor 6 and the electrical component 5, the communication and circuit are derived from the optical cable itself, which not only realizes the relay function, but also facilitates ultra-long distance communication transmission and helps to avoid The insertion loss problem of system components, at the same time, the setting method of the sensor has little effect on the power communication system carrying the sensor, and has high reliability; the setting of the sensor enables the submarine cable structure to have the function of collecting ocean information data such as external temperature, pressure and seismic acceleration of the sea area, and real-time transmission of the collected ocean information data. The data collection and transmission are convenient and fast, realizing the intelligence of the submarine cable, facilitating the observation of real-time data on the seabed, and enabling long-term real-time monitoring of the ocean climate quality, which is conducive to improving the global tsunami early warning network; the overall structure is simple and compact, with good heat dissipation performance, sealing performance and vibration and impact resistance.

[0054] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A submarine optical cable junction box, characterized in that: The invention comprises a cylinder, both ends of which are connected with a joint device, the joint device comprises a first end cover, the first end cover is connected with a limiting member, the first end cover is provided with a first accommodating chamber for accommodating the submarine optical cable, the first accommodating chamber comprises a circular hole and a tapered hole which are connected to each other, both ends of the circular hole are provided with the tapered hole, the tapered hole is connected with a first trapezoidal sealing ring, the limiting member is provided with a second accommodating chamber for accommodating the submarine optical cable, the second accommodating chamber is a tapered chamber, the second accommodating chamber is connected with the first accommodating chamber, an electrical component is connected inside the cylinder, a sensor is connected to the cylinder, and the sensor is electrically connected with the electrical component; the submarine optical cable comprises a sheath, the sheath is sleeved in the second accommodating chamber, a conductive tube is provided inside the sheath, an optical fiber is provided inside the conductive tube, an insulating layer is provided between the conductive tube and the sheath, the outer wall and the inner wall of the sheath are both tapered, an arc groove is provided on the outer wall of the sheath, and an armored steel wire is clamped in the arc groove; The sheath includes a first sheath and a second sheath, the second sheath is sleeved inside the first sheath, the first sheath is sleeved in the second accommodating cavity, the insulating layer is arranged between the conductive tube and the second sheath, the outer wall and the inner wall of the first sheath are both conical, the outer wall and the inner wall of the second sheath are both conical, the outer walls of the first sheath and the second sheath are both provided with the arc-shaped groove, and the armored steel wire is clamped in the arc-shaped groove.

2. The submarine optical cable junction box according to claim 1, characterized in that: The first end cover is sleeved inside the cylinder, and a sealing component is connected between the outer wall of the first end cover and the cylinder.

3. The submarine optical cable junction box according to claim 2, characterized in that: The sealing assembly includes an O-shaped sealing ring and a second trapezoidal sealing ring. A first sealing groove and a second sealing groove are provided on the outer wall of the first end cover. The O-shaped sealing ring is clamped in the first sealing groove, and the second trapezoidal sealing ring is clamped in the second sealing groove.

4. The submarine optical cable junction box according to claim 3, characterized in that: The first end cover is connected with a locking nut through a thread, an outer gasket is connected between the locking nut and the second trapezoidal sealing ring, and the locking nut is used to press the outer gasket against the second trapezoidal sealing ring.

5. The submarine optical cable junction box according to claim 1, characterized in that: The coupling device also includes an anti-bending device, which includes a second end cover, the second end cover and the cylinder are connected by threads, a rubber body is provided on the second end cover, and through holes for accommodating the submarine optical cable are provided inside the second end cover and the rubber body, and the through holes are communicated with the second accommodating cavity, and the first end cover and the limiter are both located inside the second end cover.

6. The submarine optical cable junction box according to claim 1, characterized in that: A support member is connected inside the cylinder, one end of the support member is connected to a first end cover on one side of the cylinder, and the other end of the support member is connected to the first end cover on the other side of the cylinder.

7. The submarine optical cable junction box according to claim 6, characterized in that: The support member is arc-shaped, and a first support platform and a second support platform are arranged inside the support member. The first support platform and the second support platform have different heights.

8. The submarine optical cable junction box according to claim 1, characterized in that: The first end cover and the limiting member are connected via threads.

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