A deep-sea photoelectric separator with liquid leakage identification function and its assembly process

Abstract

The invention discloses a deep-sea photoelectric separator with a liquid leakage identification function and an assembly process thereof, comprising: a photoelectric separator barrel, a sealing injection molding, a submarine cable cabin penetration, a first end cover, a second end cover, a sensor, an optical connector, an electrical connector, an electrical connection box and a fiber coiling box, wherein the sensor, the electrical connection box and the fiber coiling box are respectively arranged in the photoelectric separator barrel, the insulating layer of one end of the submarine cable extends into the photoelectric separator barrel through the submarine cable cabin penetration, the sealing injection molding is coated on the outer wall of the submarine cable cabin penetration and the insulating layer of a section of the submarine cable in front of the outer end of the submarine cable cabin penetration, thereby improving the sealing effect, one end of the submarine cable in the photoelectric separator barrel is decomposed into a wire part and an optical fiber part, the wire part is connected to the tail cable of the electrical connector in the electrical connection box, the optical fiber part is connected to the tail cable of the optical connector in the fiber coiling box, the sensor is connected in series to one of the optical fibers, optical power detection is performed by the sensor, and liquid leakage identification and alarm are realized.

Description

Technical Field

[0001] The invention relates to the field of photoelectric separators, and in particular to a deep-sea photoelectric separator with a liquid leakage identification function and an assembly process thereof. Background Art

[0002] As marine resource exploration develops from offshore to deep sea, the seabed observation network faces the challenges of longer power supply distance, larger data bandwidth and higher equipment reliability. As the link between shore base stations and seabed observation equipment, the photoelectric separator has a self-evident requirement for reliability.

[0003] In the prior art, the corresponding photoelectric separator structures are disclosed in the patent applications with publication numbers CN 106300223 A, CN 105811350 A and CN 108535824 A, which also have a certain sealing effect, but may not be able to be used in deep sea environments. When a liquid leakage occurs in the photoelectric separator, the optical fiber in the photoelectric separator is immersed in seawater for a long time and will be corroded by seawater, affecting the quality of communication. It is necessary to improve the sealing structure to adapt to the use environment of greater water depth.

[0004] In addition, the existing photoelectric separator does not monitor the liquid leakage status in real time. In fact, any cavity structure has the risk of watertight failure when working in the deep sea. Once a liquid leakage failure occurs, it will affect the operation of the electronic cabin if it is not repaired in time. Therefore, as a link between the shore base station and the electronic cabin of the observation network, the photoelectric separator needs to have the function of real-time liquid leakage monitoring. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a deep-sea photoelectric separator with a liquid leakage identification function and an assembly process thereof, so as to improve the sealing performance and perform real-time monitoring of the liquid leakage status to facilitate timely repair.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a deep-sea photoelectric separator with a liquid leakage identification function and an assembly process thereof, comprising: a photoelectric separator cylinder, a sealing injection molded part, a submarine cable cabin penetration part, a first end cover, a second end cover, a sensor, an optical connector, an electrical connector, an electrical connection box and a fiber coiling box, wherein the first end cover and the second end cover are arranged at both ends of the photoelectric separator cylinder, the submarine cable cabin penetration part is arranged on the first end cover, the sensor, the electrical connection box and the fiber coiling box are respectively arranged in the photoelectric separator cylinder, and the submarine cable cabin penetration part is arranged on the first end cover. The insulating layer at one end of the cable extends into the photoelectric separator cylinder through the submarine cable penetration piece, the sealing injection molded part is coated on the outer wall of the submarine cable penetration piece and the insulating layer of a section of the submarine cable in front of the outer end of the submarine cable penetration piece, the optical connector and the electrical connector are arranged on the second end cover, and the submarine cable is decomposed into an electric wire part and an optical fiber part at one end in the photoelectric separator cylinder, the electric wire part is connected to the tail cable of the electric connector in the electrical connection box, the optical fiber part is connected to the tail cable of the optical connector in the fiber coiling box, the optical fiber part includes several optical fibers, and the sensor is connected in series to one of the optical fibers.

[0007] In a preferred embodiment of the present invention, a support member located between the first end cover and the second end cover is provided in the photoelectric separator cylinder, and the sensor, the electrical connection box and the fiber coiling box are respectively directly or indirectly provided on the support member.

[0008] In a preferred embodiment of the present invention, the submarine cable penetration component is provided with an internal thread, and the insulating layer of the submarine cable is provided with an external thread corresponding to the internal thread.

[0009] In a preferred embodiment of the present invention, it also includes a compression armor structure, a bend limiter and an anti-bend device. The compression armor structure is arranged in front of the first end cover to compress the armored steel wires on the submarine cable. The bend limiter is arranged in front of the compression armor structure and is sleeved on the submarine cable. The anti-bend device is arranged in front of the bend limiter and is sleeved on the submarine cable.

[0010] In a preferred embodiment of the present invention, a stepped hole corresponding to the submarine cable penetration piece is provided at the outer end of the first end cover, a plug extending into the stepped hole is provided at the rear end of the submarine cable penetration piece, a first sealing ring is provided on the outer circle of the plug, a second sealing ring is provided on the rear end face of the submarine cable penetration piece, an extension tube corresponding to the insulation layer of one end of the submarine cable is provided at the front part of the submarine cable penetration piece, and first annular grooves are provided on the outer circles of the extension tube and the submarine cable penetration piece, respectively.

[0011] In a preferred embodiment of the present invention, a portion of the insulating layer of the submarine cable that contacts the sealing injection molded part is provided with a second annular groove or a threaded groove.

[0012] In a preferred embodiment of the present invention, the electrical connection box is filled with insulating glue.

[0013] In a preferred embodiment of the present invention, it also includes a shore base station and an electronic cabin, wherein the shore base station is provided with a light source, and the light source emits laser light to the optical fiber connected to the sensor in the submarine cable, and the electronic cabin is provided with a processor unit and an optical power detection unit, and the optical power detection unit is connected to the optical connector through a watertight optical cable to detect the optical power output by the sensor, and the optical power detection unit is connected to the processor unit to perform signal transmission;

[0014] When the deep-sea photoelectric separator is normal, the sensor is in an air environment, the air refractive index is n1, the processor unit receives the signal from the optical power detection unit, and records the optical power reference value as P1;

[0015] When a liquid leakage occurs in the deep-sea photoelectric separator, the sensor is in a water environment, and the refractive index of water is n2. The refractive index of water is very different from that of air. The change in refractive index will affect the transmission light field of the laser inside the sensor and reduce the coupling efficiency, that is, the optical power detected by the optical power detection unit is reduced, and the processor records the optical power as P2;

[0016] When the processor unit identifies that P1-P2>1dB, it determines that a liquid leakage failure has occurred in the deep-sea photoelectric separator and transmits the alarm information to the shore base station through the communication optical fiber in the submarine cable.

[0017] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide an assembly process of a deep-sea photoelectric separator, comprising the following steps:

[0018] The armored steel wire at the tail end of the submarine cable is stripped to expose a section of the insulation layer, and the insulation layer is machined to obtain a section of external thread. The submarine cable penetration piece is installed on the section of the external thread of the insulation layer by threading;

[0019] The submarine cable penetration part is placed in the mold of the injection molding equipment, and the sealed injection molding part is injection-molded, and the submarine cable penetration part and the outer circle of a section of the insulation layer are coated;

[0020] Install the submarine cable penetration piece on the first end cover, install the optical connector and the electrical connector on the second end cover, strip off the insulation layer of the submarine cable extending to the back of the first end cover to expose the wire part and the optical fiber part, connect the wire part with the tail cable of the electrical connector in the electrical connection box, connect the optical fiber part with the tail cable of the optical connector in the fiber coiling box, connect the sensor in series to an optical fiber in the optical fiber part, install the first end cover and the second end cover at both ends of the photoelectric separator cylinder, and make the sensor, the electrical connection box and the fiber coiling box located in the photoelectric separator cylinder.

[0021] In a preferred embodiment of the present invention, the following steps are also included:

[0022] Install the compression armor structure to fix the stripped armor steel wires on the submarine cable, connect the compression armor structure to the first end cover, and limit the compression armor structure;

[0023] A bending limiter is installed at the front end of the compression armor structure, and the bending limiter is sleeved on the submarine cable to limit the bending of the submarine cable;

[0024] The bending resistor is installed at the front end of the bending limiter and is sleeved on the submarine cable;

[0025] After the submarine cable is laid on the seabed, the front end of the submarine cable is connected to the shore base station, and the optical connector and electrical connector are connected to the electronic cabin through watertight cables and watertight optical cables respectively.

[0026] The beneficial effects of the present invention are as follows: the present invention points out a deep-sea photoelectric separator with liquid leakage identification function and its assembly process, which strengthens the sealing of the contact part between the submarine cable cabin penetration part and the submarine cable through the sealing injection molding part, improves the sealing performance to adapt to the use environment of greater water depth, and uses the sensor to perform real-time detection of optical power to realize liquid leakage identification of the deep-sea photoelectric separator, which is beneficial for the shore base station to obtain the alarm information of liquid leakage and carry out repairs in time to avoid affecting the operation of the electronic cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0028] Figure 1 It is a structural schematic diagram of a preferred embodiment of a deep-sea photoelectric separator with a liquid leakage identification function and its assembly process of the present invention;

[0029] Figure 2 yes Figure 1 A cross-sectional view of the photoelectric separator cylinder;

[0030] Figure 3 yes Figure 1 Schematic diagram of the structure of the China Shipping Cable Pass-through Parts;

[0031] Figure 4 It is a schematic diagram of the connection of submarine cable, sensor, optical connector, electrical connector, electrical connection box and fiber coil box in the photoelectric separator cylinder;

[0032] Figure 5 The present invention is a schematic diagram of the principle of liquid leakage identification by a deep-sea photoelectric separator with liquid leakage identification function. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1~Figure 5 , the embodiment of the present invention includes:

[0035] like Figure 1 and Figure 2 The deep-sea photoelectric separator with liquid leakage identification function shown in the figure is used for photoelectric separation and sealing of submarine cables, including: a photoelectric separator cylinder 1, a sealing injection molded part 2, a submarine cable cabin penetration part 7, a first end cover 8, a second end cover 17, a sensor 14, an optical connector 15, an electrical connector 16, an electrical connection box 18 and a fiber coiling box 19. The first end cover 8 and the second end cover 17 are arranged at both ends of the photoelectric separator cylinder and can be fixed by a third sealing ring 12 and screws.

[0036] The submarine cable entry piece 7 is arranged on the first end cover 8, and the submarine cable entry piece 7 is connected and fixed to the first end cover 8 by screws 10. The submarine cable entry piece 7 can be made of metal, and the structure is firm. Figure 3 As shown, the submarine cable penetration piece 7 is designed with a mounting hole 20 corresponding to the screw 10 , which does not affect the disassembly and assembly of the screw 10 .

[0037] like Figure 2 As shown, the outer end of the first end cover 8 is provided with a stepped hole corresponding to the submarine cable penetration member 7, and the tail of the submarine cable penetration member 7 is provided with an insertion tube 22 extending into the stepped hole, and a first sealing ring 11 is provided on the outer circle of the insertion tube 22 for waterproof sealing. A second sealing ring 9 is provided on the tail end surface of the submarine cable penetration member 7, and the second sealing ring 9 contacts the step surface of the stepped hole to strengthen the waterproof sealing.

[0038] The sensor 14, the electrical connection box 18 and the fiber coiling box 19 are respectively arranged in the photoelectric separator cylinder 1. In order to fix the sensor 14, the electrical connection box 18 and the fiber coiling box 19, a support member 13 located between the first end cover 8 and the second end cover 17 is arranged in the photoelectric separator cylinder 1. Both ends of the support member 13 can be fixed between the first end cover 8 and the second end cover 17 by pins, which is convenient for disassembly and assembly. The sensor 14, the electrical connection box 18 and the fiber coiling box 19 are respectively directly or indirectly arranged on the support member 13 and can be fixed by screws to avoid shaking.

[0039] The insulation layer of one end of the submarine cable 6 extends into the photoelectric separator cylinder 1 through the submarine cable through-hole 7, and the sealing injection molding part 2 is coated on the insulation layer of a section of the submarine cable 6 in front of the outer end of the submarine cable through-hole 7. Figure 3As shown, an extension tube 21 corresponding to the insulation layer at one end of the submarine cable is integrally provided at the front of the submarine cable penetration member 7, so as to facilitate the insertion and guidance of the insulation layer.

[0040] In order to improve the stability of the connection between the submarine cable and the deep-sea photoelectric separator, a compression armor structure 3, a bending limiter 4 and an anti-bending device 5 are also required. The compression armor structure 3 is arranged in front of the first end cover 8 to press and fix the armored steel wire on the submarine cable 6 to improve the connection stability between the submarine cable 6 and the deep-sea photoelectric separator. The bending limiter 4 is arranged in front of the compression armor structure 3 and sleeved on the submarine cable 6. The anti-bending device 5 is arranged in front of the bending limiter 4 and sleeved on the submarine cable 6 to provide anti-bending protection for the submarine cable 6.

[0041] In this embodiment, an internal thread 23 is provided in the submarine cable penetration piece 7, and an external thread corresponding to the internal thread 23 is provided on the insulating layer of the submarine cable 6, so as to realize the threaded connection between the submarine cable penetration piece 7 and the insulating layer of the submarine cable 6, which has a stable structure, is easy to construct, and is also beneficial to improving the sealing effect.

[0042] First annular grooves 24 are arranged at intervals on the outer circumferences of the extension tube 21 and the submarine cable penetration piece 7, respectively, and the first annular grooves 24 can strengthen the connection strength between the extension tube 21 and the submarine cable penetration piece 7 and the sealing injection molded part 2. In addition, the sealing injection molded part 2 and the insulating layer of the submarine cable 6 can be made of the same PE material, and the part of the sealing injection molded part 2 that contacts the insulating layer during injection molding is fused, which greatly improves the sealing effect.

[0043] In addition, in order to improve the fusion effect, a second annular groove or a threaded groove may be provided on the portion of the insulation layer of the submarine cable 6 that contacts the sealing injection molded part 2 to further enhance the bonding stability between the insulation layer of the submarine cable 6 and the sealing injection molded part 2.

[0044] like Figure 2 As shown, the optical connector 15 and the electrical connector 16 are arranged on the second end cover 17, and can be waterproofed and sealed by screws and sealing rings. The end of the submarine cable 6 in the photoelectric separator cylinder 1 is decomposed into a wire part and an optical fiber part, and the wire part is connected to the tail cable of the electrical connector 16 in the electrical connection box 18. In this embodiment, the electrical connection box 18 is filled with insulating glue to provide insulation protection for the electrical connection. When a liquid leakage fault occurs in the photoelectric separator, the power supply to the electronic cabin is not affected.

[0045] The fiber section and the tail cable of the optical connector 15 are connected in the fiber coil box 19. The fiber section includes several optical fibers, and the sensor 14 is connected in series to one of the optical fibers, which is convenient for assembly. The sensor 14 uses an optical coupling device, does not require power supply, and uses the refractive index of the medium in the photoelectric separator cylinder 1 to affect the transmission light field of the laser inside the sensor and change the coupling efficiency.

[0046] In order to realize the alarm of liquid leakage fault, a shore base station and an electronic cabin are also required. Figure 4~Figure 5As shown, a light source is provided in the shore base station, and the light source emits laser to the optical fiber connected to the sensor 14 in the submarine cable. A processor unit and an optical power detection unit are provided in the electronic cabin. The optical power detection unit can adopt a photodiode, which is connected to the optical connector through a watertight optical cable to detect the optical power output by the sensor. The optical power detection unit is connected to the processor unit for signal transmission, and the signal is processed by the processor unit.

[0047] When the deep-sea photoelectric separator is normal, the sensor is in an air environment, the air refractive index is n1, the processor unit receives the signal from the optical power detection unit, and records the optical power reference value as P1;

[0048] When a liquid leakage occurs in the deep-sea photoelectric separator, the sensor is in a water environment, and the refractive index of water is n2. The refractive index of water is very different from that of air. For example, when n1=1 and n2=1.3, the increase in the refractive index will affect the transmission light field of the laser inside the sensor and reduce the coupling efficiency, that is, the optical power detected by the optical power detection unit is reduced, and the processor records the optical power as P2;

[0049] When the processor unit identifies that P1-P2>1dB, it determines that a liquid leakage fault has occurred in the deep-sea photoelectric separator and transmits the alarm information to the shore base station through the communication optical fiber in the submarine cable, which is conducive to timely repair and avoids affecting the subsequent normal operation of the electronic cabin.

[0050] An assembly process of a deep-sea photoelectric separator comprises the following steps:

[0051] The armored steel wire at the tail end of the submarine cable 6 is stripped to expose a section of the insulation layer, and the insulation layer is machined to obtain a section of external thread. The submarine cable penetration piece 7 is installed on the section of the external thread of the insulation layer by threading, and the fit is tight;

[0052] The submarine cable entry piece 7 is placed in a mold of an injection molding device, and the sealing injection molding piece 2 is injection-molded to obtain the sealing injection molding piece 2 to cover the submarine cable entry piece 7 and the outer circle of a section of the insulation layer, and the surface of the section of the insulation layer is integrated with the sealing injection molding piece 2 to improve the sealing effect to adapt to the use environment of greater water depth;

[0053] Install the submarine cable penetration 7 on the first end cover 8 and fasten it with screws 10, install the optical connector 15 and the electrical connector 16 on the second end cover 17, peel off the insulation layer of the submarine cable extending to the back of the first end cover 8 to expose the wire part and the optical fiber part, connect the wire part with the tail cable of the electrical connector in the electrical connection box 18, and then inject insulation glue into the electrical connection box 18 to perform insulation sealing to improve the waterproofness of the electrical connection box 18;

[0054] Connect the fiber part and the tail cable of the optical connector 15 in the fiber coiling box 19, connect the sensor 14 in series to an optical fiber in the fiber part, fix the electrical connection box 18, the fiber coiling box 19 and the sensor 14 on the support 13, and then connect the wire part and the optical fiber part, then place the support 13 into the photoelectric separator cylinder 1, and then install the first end cover 8 and the second end cover 17 at both ends of the photoelectric separator cylinder 1, and limit the two ends of the support 13 to ensure the stability of the sensor 14, the electrical connection box 18 and the fiber coiling box 19 in the photoelectric separator cylinder 1;

[0055] Install the compression armor structure 3 to fix the stripped armor steel wires on the submarine cable 6, connect the compression armor structure 3 to the first end cover 8, and limit the compression armor structure 3;

[0056] A bending limiter 4 is installed at the front end of the compression armor structure 3, and the bending limiter 4 is sleeved on the submarine cable 6 to limit the bending of the submarine cable;

[0057] The bending resistor 5 is installed at the front end of the bending limiter 4 and is sleeved on the submarine cable 6 to provide bending protection for the submarine cable 6;

[0058] After the submarine cable 6 is laid on the seabed, the front end of the submarine cable is connected to the shore base station, and the optical connector and the electrical connector are connected to the electronic cabin through watertight cables and watertight optical cables respectively to meet the power supply and communication requirements of the electronic cabin.

[0059] In summary, the present invention points out a deep-sea photoelectric separator with liquid leakage identification function and its assembly process, which is easy to assemble and has good sealing effect, is conducive to improving the application water depth, and can identify liquid leakage in real time, issue an alarm in case of liquid leakage, and facilitate maintenance.

[0060] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A deep-sea photoelectric separator with liquid leakage identification function, used for photoelectric separation and sealing of submarine cables, characterized in that: include: A photoelectric separator cylinder, a sealed injection molded part, a submarine cable penetration part, a first end cover, a second end cover, a sensor, an optical connector, an electrical connector, an electrical connection box, a fiber coil, a shore base station and an electronic cabin, wherein the first end cover and the second end cover are arranged at both ends of the photoelectric separator cylinder, the submarine cable penetration part is arranged on the first end cover, the sensor, the electrical connection box and the fiber coil box are respectively arranged in the photoelectric separator cylinder, the insulating layer of one end of the submarine cable extends into the photoelectric separator cylinder through the submarine cable penetration part, the sealed injection molded part is coated on the outer wall of the submarine cable penetration part and the insulating layer of a section of the submarine cable in front of the outer end of the submarine cable penetration part, the optical connector and the electrical connector are arranged on the second end cover, The submarine cable is decomposed into an electric wire part and an optical fiber part at one end in the photoelectric separator cylinder. The electric wire part is connected to the tail cable of the electric connector in the electric connection box, and the optical fiber part is connected to the tail cable of the optical connector in the fiber coiling box. The optical fiber part includes several optical fibers, and the sensor is connected in series to one of the optical fibers. A light source is provided in the shore base station, and the light source emits laser to the optical fiber connected to the sensor in the submarine cable. A processor unit and an optical power detection unit are provided in the electronic cabin. The optical power detection unit is connected to the optical connector through a watertight optical cable to detect the optical power output by the sensor. The optical power detection unit is connected to the processor unit for signal transmission. When the deep-sea photoelectric separator is normal, the sensor is in an air environment, the air refractive index is n1, the processor unit receives the signal from the optical power detection unit, and records the optical power reference value as P1; When a liquid leakage occurs in the deep-sea photoelectric separator, the sensor is in a water environment, and the refractive index of water is n2. The refractive index of water is very different from that of air. The change in refractive index will affect the transmission light field of the laser inside the sensor and reduce the coupling efficiency, that is, the optical power detected by the optical power detection unit is reduced, and the processor records the optical power as P2; When the processor unit identifies that P1-P2>1dB, it determines that a liquid leakage failure has occurred in the deep-sea photoelectric separator and transmits the alarm information to the shore base station through the communication optical fiber in the submarine cable.

2. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1 is characterized in that: The photoelectric separator cylinder is provided with a support member located between the first end cover and the second end cover, and the sensor, the electrical connection box and the fiber coiling box are respectively directly or indirectly arranged on the support member.

3. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1, characterized in that: The submarine cable penetration piece is provided with an internal thread, and the insulating layer of the submarine cable is provided with an external thread corresponding to the internal thread.

4. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1, characterized in that: It also includes a compression armor structure, a bending limiter and an anti-bending device. The compression armor structure is arranged in front of the first end cover to compress the armored steel wires on the submarine cable. The bending limiter is arranged in front of the compression armor structure and is sleeved on the submarine cable. The anti-bending device is arranged in front of the bending limiter and is sleeved on the submarine cable.

5. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1, characterized in that: The outer end of the first end cover is provided with a stepped hole corresponding to the submarine cable penetration piece, the tail of the submarine cable penetration piece is provided with an insertion tube extending into the stepped hole, a first sealing ring is provided on the outer circle of the insertion tube, a second sealing ring is provided on the tail end face of the submarine cable penetration piece, an extension tube corresponding to the insulation layer of one end of the submarine cable is provided at the front part of the submarine cable penetration piece, and first annular grooves are respectively provided on the outer circle of the extension tube and the submarine cable penetration piece.

6. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1, characterized in that: A portion of the insulating layer of the submarine cable that contacts the sealing injection molded part is provided with a second annular groove or a threaded groove.

7. The deep-sea photoelectric separator with liquid leakage identification function according to claim 1, characterized in that: The electrical connection box is filled with insulating glue.

8. An assembly process for a deep-sea photoelectric separator, characterized in that: The assembly of the deep-sea photoelectric separator with liquid leakage identification function as claimed in any one of claims 1 to 7 comprises the following steps: The armored steel wire at the tail end of the submarine cable is stripped to expose a section of the insulation layer, and the insulation layer is machined to obtain a section of external thread. The submarine cable penetration piece is installed on the section of the external thread of the insulation layer by threading; The submarine cable penetration part is placed in the mold of the injection molding equipment, and the sealed injection molding part is injection-molded, and the submarine cable penetration part and the outer circle of a section of the insulation layer are coated; Install the submarine cable penetration piece on the first end cover, install the optical connector and the electrical connector on the second end cover, strip off the insulation layer of the submarine cable extending to the back of the first end cover to expose the wire part and the optical fiber part, connect the wire part with the tail cable of the electrical connector in the electrical connection box, connect the optical fiber part with the tail cable of the optical connector in the fiber coiling box, connect the sensor in series to an optical fiber in the optical fiber part, and install the first end cover and the second end cover at both ends of the photoelectric separator cylinder.

9. The assembly process of the deep-sea photoelectric separator according to claim 8, characterized in that: The following steps are also included: Install the compression armor structure to fix the stripped armor steel wires on the submarine cable, connect the compression armor structure to the first end cover, and limit the compression armor structure; A bending limiter is installed at the front end of the compression armor structure, and the bending limiter is sleeved on the submarine cable to limit the bending of the submarine cable; The bending resistor is installed at the front end of the bending limiter and is sleeved on the submarine cable; After the submarine cable is laid on the seabed, the front end of the submarine cable is connected to the shore base station, and the optical connector and electrical connector are connected to the electronic cabin through watertight cables and watertight optical cables respectively.

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