Multi-core optical fiber sealing cabin penetrating piece for deep sea and manufacturing method of multi-core optical fiber sealing cabin penetrating piece

Abstract

The invention discloses an optical fiber processing technology, and aims to provide a multi-core optical fiber sealing cabin penetrating piece for deep sea and a manufacturing method of the multi-core optical fiber sealing cabin penetrating piece, and the multi-core optical fiber sealing cabin penetrating piece can be universally used for various optical fibers, is simple and convenient to operate and can complete small-sized integrated multi-path optical fiber sealing threading. Only few parts are used while the optical fibers penetrate through the cabin wall in a sealed mode, multiple paths of optical fibers can penetrate through one small part at the same time, further, after the optical fibers needing to penetrate through penetrate through corresponding hole sites of the cabin penetrating piece, the two ends of the optical fibers are sleeved with protection pipes, and therefore possible bending points of the optical fibers are protected. The liquid bag is arranged in the cabin penetrating part, the glue for sealing is filled in the liquid bag and is sleeved from one end, actually bearing pressure, of the cabin penetrating part, the liquid in the liquid bag can complete simultaneous filling of the optical fiber penetrating hole positions along with movement of the liquid bag, synchronism of all the hole positions is guaranteed, and simultaneous sealing of multiple paths of optical fibers is achieved after filling is completed. The method is suitable for the technical field of optical fiber connection processing.

Description

Technical Field

[0001] The present invention relates to an optical fiber processing process, and more particularly to a multi-core optical fiber sealing penetration component for deep sea use and a manufacturing method thereof. Background Art

[0002] Typically, when optical fibers need to pass through bulkheads with pressure differences on both sides and both sides need to be sealed, a sealed connector connection is used. Although sealed connectors are structurally stable, they are generally expensive and bulky, making them difficult to implement under sealed conditions for optical fiber passage in small spaces. This method also requires matching connectors for the matching optical fibers, making the current optical fiber sealing and threading process more complicated. At the same time, after installation, the optical fiber needs to be sealed through a sealed connector, making the overall operation more complicated.

[0003] In summary, in some application scenarios, such as when space is limited or special optical fibers cannot use special sealed connectors, a universal method is needed to process the optical fiber to complete the sealing. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a deep-sea multi-core optical fiber sealing penetration component and its manufacturing method that can be used for various types of optical fibers, is simple to operate, and can complete small-scale integrated multi-channel optical fiber sealing and threading.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-core optical fiber sealing penetration component for deep sea use, comprising a penetration shell, the penetration shell comprising a connecting portion and a pressure portion, the penetration shell being installed on the bulkhead through the connecting portion, an installation chamber being provided in the penetration shell, at least two optical fiber channels being provided in the axial direction of the installation chamber, optical fibers being provided in the optical fiber channels, and protective tubes being provided at both ends of the optical fibers.

[0006] The present invention is further configured as follows: a cavity is provided between the optical fiber and the optical fiber channel, and the cavity is configured to be used for adding curing glue.

[0007] The present invention is further configured as follows: a sealing groove is further provided on the outside of the connecting portion, a sealing ring is provided in the sealing groove, and the sealing ring is configured to form a seal between the shell and the bulkhead after the cabin penetration component is installed.

[0008] The present invention is further configured as follows: a liquid bag is further provided on one side of the cabin penetration shell, the liquid bag is arranged on the pressure part, curing glue is provided in the liquid bag, and the liquid bag is configured to fill the curing glue into the cavity.

[0009] The present invention is further configured as follows: the material of the cabin penetration shell is one or more of duplex stainless steel, nickel-based alloy, and titanium alloy.

[0010] The present invention is further configured such that: an interference step is further provided on the connecting portion, and the direction of the interference step matches the pressure direction of the cabin penetration member.

[0011] The present application also provides a method for manufacturing a multi-core optical fiber sealing penetration component for deep-sea use, comprising the following steps: S1, installing optical fibers: passing the optical fibers to be penetrated through corresponding cable channels in the penetration shell;

[0012] S2. Installing protective tubes: insert protective tubes at both ends of the optical fiber, with the locations where the protective tubes are installed being possible bending points of the optical fiber;

[0013] S3. Preparing the liquid capsule: filling the liquid capsule with glue used to fill the cabin shell, thereby obtaining a filled liquid capsule;

[0014] S4. Glue pouring: The filled liquid bag is placed on the pressure portion of the piercing component. After the placement is completed, the liquid bag is moved to pour the glue in the liquid bag into the cavity between the optical fiber and the optical fiber channel;

[0015] S5. Curing and sealing: After the glue is poured, the liquid capsule is removed and the optical fiber is sealed after the glue solidifies.

[0016] S6. External sealing of the penetration shell: Install a sealing ring in the sealing groove on the outside of the penetration shell connection. After the sealing ring is installed, install the penetration component into the corresponding hole in the bulkhead to complete the fiber penetration.

[0017] S7. Effect test: After the installation of the penetration piece is completed, the installed bulkhead is subjected to a pressure test. If the penetration piece remains sealed after being subjected to the set pressure, the current penetration piece is judged to be qualified; otherwise, the current penetration piece is judged to be unqualified.

[0018] Preferably, the method for detecting the cabin penetration component in step S7 includes the following steps: S71, placing the bulkhead with the cabin penetration component installed in the detection equipment, connecting the optical fiber, testing the signal transmission effect of the connected structure, and obtaining the signal transmission efficiency in a normal environment as P0; if the signal transmission effect after the connection is poor, it is determined that the optical fiber in the current cabin penetration component is unqualified or there is a problem in the connection process, and the current cabin penetration component is reworked and repaired; otherwise, the process jumps to S72 to continue the detection;

[0019] S72. A simulated medium is introduced into the side of the bulkhead having the through-hull pressure portion and the bulkhead is tested in accordance with the full sea depth level inspection specifications.

[0020] S73. During the testing process, the signal transmission effect of the penetration component is continuously tested, and the deep-sea environment signal transmission efficiency is obtained as P1. If P1 ≤ 0.75P0, it is determined that the current penetration component is significantly affected by the deep-sea environment and is unqualified. Otherwise, the current penetration component is determined to have a qualified transmission effect.

[0021] S74. After the test is completed, the installed bulkhead is removed and the penetration body is tested. If liquid is present inside the penetration body, the watertightness of the current penetration body is judged to be poor and the penetration body is unqualified. Otherwise, the watertightness of the current penetration body is judged to be good and the penetration body is qualified.

[0022] Preferably, in step S4, the moving direction of the liquid bag matches the direction of the pressure to which the cabin penetration member is subjected when in use.

[0023] By adopting the above technical solution, the beneficial effects are as follows: 1. The present application satisfies the requirement of optical fiber sealing through the bulkhead through an integrated design concept, while only a very small number of parts are used, and multiple optical fibers can be simultaneously passed through in a miniaturized part. Generally speaking, in the present application, a single penetration part can complete the passage of up to 16 core optical fibers, and the maximum diameter is only 15 mm, which meets the integration and miniaturization requirements of the design of the present application and achieves a reduction in production costs. Furthermore, after the optical fibers to be passed through are passed through the corresponding holes of the penetration part, protective tubes are inserted at both ends to protect the possible bending points of the optical fibers, and glue for sealing is filled in the liquid capsule, which is inserted from the end of the penetration part that actually bears the pressure. The liquid in the liquid capsule can be simultaneously injected into the holes of the optical fibers as the liquid capsule moves, ensuring the synchronization of each hole, and achieving simultaneous sealing of multiple optical fibers after the injection is completed.

[0024] 2. Furthermore, in order to ensure the sealing of the interior of the penetration part after the optical fiber is inserted, the present application provides a cavity between the penetration shell and the optical fiber and fills the cavity with curing glue. After the glue solidifies, a tight combination between the optical fiber and the optical fiber channel inside the penetration shell is achieved. Generally speaking, if curing glue is not filled between the optical fiber and the optical fiber channel, gaps will inevitably appear between the optical fiber and the optical fiber channel, which may easily lead to leakage of liquid and gas during the operation of the penetration part, reducing the overall use effect. Specifically, a liquid bag is used to fill the interior of the penetration part with glue, and the glue is directionally filled in the cavity under the drive of the liquid bag pressure, and the moving direction of the liquid bag matches the direction of pressure, so that the glue can form a seal on the interior of the penetration part after curing and can resist the pressure at the pressure end, so that the penetration part has good sealing after installation, preventing the risk of leakage during use.

[0025] 3. At the same time, after the cabin penetration piece is installed, in order to improve the sealing between the cabin penetration shell and the bulkhead and prevent the cabin penetration body from falling off after being subjected to pressure, a sealing groove is provided on the outer side of the cabin penetration shell, and a sealing ring is provided in the sealing groove, and an interference step is provided on the cabin penetration shell. The direction of the interference step matches the pressure direction of the cabin penetration piece. Specifically, after the cabin penetration piece is installed on the bulkhead and put into use, one side of the pressure portion of the cabin penetration piece will be affected by the medium in the bulkhead, thereby generating pressure on the cabin penetration piece. After the cabin penetration piece is subjected to pressure, it can interfere with the bulkhead through the interference step, so that the cabin penetration piece and the interference step remain relatively fixed, and the sealing between the cabin penetration piece and the bulkhead is completed by the sealing ring provided in the sealing groove.

[0026] 4. In addition, after the installation of the tank penetration is completed, the optical fiber transmission effect and the sealing of the tank penetration are tested through a simulated environment. By simulating the deep-sea environment or a variety of liquid media, it is ensured that the tank penetration can meet the standards of deep-sea operation or other various environmental operations, and potential sealing defects and defects in the optical fiber connection process will occur in advance. It is worth mentioning that the deep-sea environment testing method for the tank penetration adopts the full-sea depth-level inspection specification, the testing standard is 127MPa, the testing time is 48 hours, and 200 extreme pressure shock cycle tests are carried out after the static water pressure test, which can effectively eliminate unqualified products, improve the product qualification rate, and prevent the damage of the tank penetration during use.

[0027] 5. In general, during the production process of this application, the designed parts are integrated and the manufacturing process adopts a universal method. Even in the face of different optical fiber requirements and different optical path requirements, universal parts and methods can be used for manufacturing, reducing material and production costs. The production method of this application does not perform special treatment on the optical fiber itself, and there is no docking and plugging process. Therefore, the optical path loss caused by the finished product of the invention is almost 0, avoiding the impact of optical path loss on device signal transmission and increasing the transmission distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the specific structure of a multi-core optical fiber sealing penetration component for deep sea use and a manufacturing method thereof before filling and curing glue according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the installation of a multi-core optical fiber sealing penetration component for deep sea use and a manufacturing method thereof according to an embodiment of the present invention;

[0030] Figure 3 This is a flow chart of a method for manufacturing a multi-core optical fiber sealing penetration component for deep sea use and a method for manufacturing the same according to an embodiment of the present invention;

[0031] Figure 4This is a flow chart of a method for detecting a multi-core optical fiber sealed penetration component for deep sea use and a method for manufacturing the same according to an embodiment of the present invention;

[0032] The reference numerals in the figure are: 1. cabin shell; 101. connecting part; 102. pressure part; 2. bulkhead; 3. installation chamber; 4. optical fiber channel; 5. optical fiber; 6. protective tube; 7. cavity; 8. curing glue; 9. sealing groove; 10. sealing ring; 11. liquid capsule; 12. interference step. DETAILED DESCRIPTION

[0033] Reference Figures 1 to 4 The present invention further describes a multi-core optical fiber sealing penetration component for deep sea use and an embodiment of a manufacturing method thereof.

[0034] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0035] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0036] A multi-core optical fiber sealing penetration component for deep sea use includes a penetration shell 1, which includes a connecting portion 101 and a pressure portion 102. The penetration shell 1 is installed on the bulkhead 2 through the connecting portion 101. An installation chamber 3 is provided in the penetration shell 1, and at least two optical fiber channels 4 are provided in the axial direction of the installation chamber 3. Optical fibers 5 are provided in the optical fiber channels 4, and protective tubes 6 are also provided at both ends of the optical fibers 5.

[0037] A cavity 7 is further provided between the optical fiber 5 and the optical fiber channel 4 , and the cavity 7 is configured for adding curing glue 8 .

[0038] A sealing groove 9 is further provided on the outside of the connecting portion 101 , and a sealing ring 10 is provided in the sealing groove 9 . The sealing ring 10 is configured to form a seal between the shell and the bulkhead 2 after the cabin penetration component is installed.

[0039] A liquid capsule 11 is further provided on one side of the cabin penetration shell 1 . The liquid capsule 11 is provided on the pressure portion 102 . Curing glue 8 is provided in the liquid capsule 11 . The liquid capsule 11 is configured to fill the cavity 7 with the curing glue 8 .

[0040] The material of the cabin penetration shell 1 is one or more of duplex stainless steel, nickel-based alloy, and titanium alloy.

[0041] The connecting portion 101 is further provided with an interference step 12 , the direction of which matches the pressure direction of the cabin penetration member.

[0042] The present application also provides a method for manufacturing a multi-core optical fiber sealing penetration component for deep-sea use, comprising the following steps: S1, installing optical fibers: passing the optical fibers to be penetrated through corresponding cable channels in the penetration shell;

[0043] S2. Installing protective tubes: insert protective tubes at both ends of the optical fiber, with the locations where the protective tubes are installed being possible bending points of the optical fiber;

[0044] S3. Preparing the liquid capsule: filling the liquid capsule with glue used to fill the cabin shell, thereby obtaining a filled liquid capsule;

[0045] S4. Glue pouring: The filled liquid bag is placed on the pressure portion of the piercing component. After the placement is completed, the liquid bag is moved to pour the glue in the liquid bag into the cavity between the optical fiber and the optical fiber channel;

[0046] S5. Curing and sealing: After the glue is injected, the liquid capsule is removed and the optical fiber is sealed after the glue solidifies.

[0047] S6. External sealing of the penetration shell: Install a sealing ring in the sealing groove on the outside of the penetration shell connection. After the sealing ring is installed, install the penetration component into the corresponding hole in the bulkhead to complete the fiber penetration.

[0048] S7. Effect test: After the installation of the penetration piece is completed, the installed bulkhead is subjected to a pressure test. If the penetration piece remains sealed after being subjected to the set pressure, the current penetration piece is judged to be qualified; otherwise, the current penetration piece is judged to be unqualified.

[0049] Preferably, the method for detecting the cabin penetration component in step S7 includes the following steps: S71, placing the bulkhead with the cabin penetration component installed in the detection equipment, connecting the optical fiber, testing the signal transmission effect of the connected structure, and obtaining the signal transmission efficiency in a normal environment as P0; if the signal transmission effect after the connection is poor, it is determined that the optical fiber in the current cabin penetration component is unqualified or there is a problem in the connection process, and the current cabin penetration component is reworked and repaired; otherwise, the process jumps to S72 to continue the detection;

[0050] S72. A simulated medium is introduced into the side of the bulkhead having the through-hull pressure portion and the bulkhead is tested in accordance with the full sea depth level inspection specifications.

[0051] S73. During the testing process, the signal transmission effect of the penetration component is continuously tested, and the deep-sea environment signal transmission efficiency is obtained as P1. If P1 ≤ 0.75P0, it is determined that the current penetration component is significantly affected by the deep-sea environment and is unqualified. Otherwise, the current penetration component is determined to have a qualified transmission effect.

[0052] S74. After the test is completed, the installed bulkhead is removed and the penetration body is tested. If liquid is present inside the penetration body, the watertightness of the current penetration body is judged to be poor and the penetration body is unqualified. Otherwise, the watertightness of the current penetration body is judged to be good and the penetration body is qualified.

[0053] Preferably, in step S4, the moving direction of the liquid bag matches the direction of the pressure to which the cabin penetration member is subjected when in use.

[0054] The present application adopts an integrated design concept to meet the requirement of sealing the optical fiber 5 through the bulkhead 2 while using only a very small number of parts, and can enable multiple optical fibers 5 to pass through in a miniaturized part at the same time. Generally speaking, in the present application, a single penetration part can complete the passage of up to 16 core optical fibers 5, and the maximum diameter is only 15 mm, which meets the integration and miniaturization requirements of the design of the present application and achieves a reduction in production costs. Furthermore, after the optical fiber 5 to be passed through is passed through the corresponding hole position of the penetration part, a protective tube 6 is inserted at both ends to protect the possible bending points of the optical fiber 5, and glue for sealing is filled in the liquid capsule 11, which is inserted from the end of the penetration part that actually bears the pressure. The liquid in the liquid capsule 11 can complete the simultaneous infusion of the optical fiber 5 through the hole position as the liquid capsule 11 moves, ensuring the synchronization of each hole position, and achieving the simultaneous sealing of multiple optical fibers 5 after the infusion is completed.

[0055] Furthermore, in order to ensure the sealing of the interior of the penetration part after the optical fiber 5 is inserted, the present application provides a cavity 7 between the penetration shell 1 and the optical fiber 5 and fills the cavity 7 with curing glue 8. After the glue solidifies, a tight combination between the optical fiber 5 and the optical fiber channel 4 inside the penetration shell 1 is achieved. Generally speaking, if the curing glue 8 is not filled between the optical fiber 5 and the optical fiber channel 4, a gap will inevitably appear between the optical fiber 5 and the optical fiber channel 4, which may easily lead to leakage of liquid and gas during the operation of the penetration part, thereby reducing the overall use effect. Specifically, a liquid capsule 11 is used to fill the interior of the penetration part with glue. The glue is directionally filled in the cavity 7 under the pressure of the liquid capsule 11, and the moving direction of the liquid capsule 11 matches the direction of pressure, so that the glue can form a seal on the interior of the penetration part after curing and can resist the pressure at the end of the pressure part 102, so that the penetration part has good sealing after installation, preventing the risk of leakage during use.

[0056] At the same time, after the installation of the piercing piece is completed, in order to improve the sealing between the piercing shell 1 and the bulkhead 2 and prevent the piercing body from falling off after being subjected to pressure, a sealing groove 9 is provided on the outer side of the piercing shell 1, and a sealing ring 10 is provided in the sealing groove 9, and an interference step 12 is provided on the piercing shell 1. The direction of the interference step 12 matches the pressure direction of the piercing piece. Specifically, after the piercing piece is installed on the bulkhead 2 and put into use, one side of the pressure part 102 of the piercing piece will be affected by the medium in the bulkhead 2, thereby generating pressure on the piercing piece. After the piercing piece is subjected to pressure, it can interfere with the bulkhead 2 through the interference step 12, so that the piercing piece and the interference step 12 remain relatively fixed, and the sealing between the piercing piece and the bulkhead 2 is completed by the sealing ring 10 provided in the sealing groove 9.

[0057] During the use of this application, the penetration component is installed on the partition plate between the dry tank and the wet tank. Since the wet tank is an oil-filled pressure balance tank, the pressure inside the tank is the same as the external water pressure. Therefore, the penetration component is subjected to the axial pressure from the wet tank to the dry tank, meeting the pressure resistance and sealing between the penetration component partition plate, the optical fiber 5 and the penetration component shell, and can withstand the large pressure difference between the wet tank and the dry tank, meet the requirements of deep-sea applications, and have the characteristics of miniaturization and high reliability.

[0058] In addition, after the installation of the penetration piece is completed, the transmission effect of the optical fiber 5 and the sealing of the penetration piece are tested through a simulated environment. By simulating the deep-sea environment or a variety of liquid media, it is ensured that the penetration piece can meet the standards of deep-sea operation or other various environmental operations, and potential sealing defects and defects in the connection process of the optical fiber 5 occur in advance. It is worth mentioning that the deep-sea environment testing method for the penetration piece adopts the full-sea depth-level inspection specification, the testing standard is 127MPa, the testing time is 48 hours, and 200 extreme pressure shock cycle tests are carried out after the static water pressure test, which can effectively eliminate unqualified products, improve the product qualification rate, and prevent the problem of damage to the penetration piece during use.

[0059] In general, during the production process of this application, the designed parts are integrated and the manufacturing process adopts a universal method. Even in the face of different optical fiber 5 requirements and different optical path requirements, universal parts and methods can be used for manufacturing, reducing material and production costs. The production method of this application does not perform special treatment on the optical fiber 5 itself, and there is no docking and plugging process. Therefore, the optical path loss caused by the finished product of the invention is almost 0, avoiding the impact of optical path loss on device signal transmission and increasing the transmission distance.

[0060] At the same time, the application also obtained the test data described in the following table during the test, and the test data is as follows:

[0061] Table 1 - Gas Leak Test (Helium)

[0062] Table 2- Watertightness

[0063] This invention solves the problem of simultaneously miniaturizing, integrating, and sealing multiple optical fibers, achieving lossless transmission and a reliable structure with satisfactory sealing performance. Based on these characteristics, it can be integrated into various devices and is particularly suitable for use in high-pressure working conditions in deep-sea environments, with broad prospects for development.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-core optical fiber sealing penetration component for deep sea, comprising a penetration shell (1), wherein the penetration shell (1) comprises a connecting portion (101) and a pressure portion (102), and the penetration shell (1) is mounted on a bulkhead (2) via the connecting portion (101), characterized in that: An installation chamber (3) is provided in the cabin penetration shell (1), at least two optical fiber channels (4) are provided in the axial direction of the installation chamber (3), optical fibers (5) are provided in the optical fiber channels (4), and protective tubes (6) are provided at both ends of the optical fibers (5).

2. The deep-sea multi-core optical fiber sealing penetration component according to claim 1, characterized in that: A cavity (7) is further provided between the optical fiber (5) and the optical fiber channel (4), and the cavity (7) is configured to be used for adding curing glue (8).

3. The deep-sea multi-core optical fiber sealing penetration component according to claim 1, characterized in that: A sealing groove (9) is further provided on the outside of the connecting portion (101), and a sealing ring (10) is provided in the sealing groove (9). The sealing ring (10) is configured to form a seal between the shell and the bulkhead (2) after the cabin penetration component is installed.

4. The deep-sea multi-core optical fiber sealing penetration component according to claim 1, characterized in that: A liquid capsule (11) is further provided on one side of the cabin penetration shell (1), wherein the liquid capsule (11) is provided on the pressure portion (102), wherein curing glue (8) is provided in the liquid capsule (11), and wherein the liquid capsule (11) is configured to be used for filling the curing glue (8) into the cavity (7).

5. The deep-sea multi-core optical fiber sealing penetration component according to claim 1, characterized in that: The material of the cabin penetration shell (1) is one or more of duplex stainless steel, nickel-based alloy, and titanium alloy.

6. The deep-sea multi-core optical fiber sealing penetration component according to claim 1, characterized in that: The connecting portion (101) is further provided with a resistance step (12), and the direction of the resistance step (12) matches the pressure direction of the cabin penetration member.

7. A method for manufacturing a deep-sea multi-core optical fiber sealing penetration component according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Install the optical fiber: Pass the optical fiber to be passed through the corresponding cable channel in the cabin shell; S2. Installing protective tubes: insert protective tubes at both ends of the optical fiber, with the locations where the protective tubes are installed being possible bending points of the optical fiber; S3. Preparing the liquid capsule: filling the liquid capsule with glue used to fill the cabin shell, thereby obtaining a filled liquid capsule; S4. Glue pouring: The filled liquid bag is placed on the pressure portion of the piercing component. After the placement is completed, the liquid bag is moved to pour the glue in the liquid bag into the cavity between the optical fiber and the optical fiber channel; S5. Curing and sealing: After the glue is injected, the liquid capsule is removed and the optical fiber is sealed after the glue solidifies. S6. External sealing of the penetration shell: Install a sealing ring in the sealing groove on the outside of the penetration shell connection. After the sealing ring is installed, install the penetration component into the corresponding hole in the bulkhead to complete the fiber penetration. S7. Effect test: After the installation of the penetration piece is completed, the installed bulkhead is subjected to a pressure test. If the penetration piece remains sealed after being subjected to the set pressure, the current penetration piece is judged to be qualified; otherwise, the current penetration piece is judged to be unqualified.

8. The method for manufacturing a multi-core optical fiber sealing penetration component for deep sea use according to claim 7, characterized in that: The method for inspecting the cabin penetration component in step S7 includes the following steps: S71, placing the bulkhead with the cabin penetration component installed in the inspection equipment, connecting the optical fiber, testing the signal transmission effect of the connected structure, and obtaining a normal environment signal transmission efficiency P0. If the signal transmission effect after the connection is poor, it is determined that the optical fiber in the current cabin penetration component is unqualified or there is a problem in the connection process, and the current cabin penetration component is reworked and repaired. Otherwise, the process jumps to S72 to continue inspection; S72. A simulated medium is introduced into the side of the bulkhead having the through-hull pressure portion and the bulkhead is tested in accordance with the full sea depth level inspection specifications. S73. During the testing process, the signal transmission effect of the penetration component is continuously tested, and the deep-sea environment signal transmission efficiency is obtained as P1. If P1 ≤ 0.75P0, it is determined that the current penetration component is significantly affected by the deep-sea environment and is unqualified. Otherwise, the current penetration component is determined to have a qualified transmission effect. S74. After the test is completed, the installed bulkhead is removed and the penetration body is tested. If liquid is present inside the penetration body, the watertightness of the current penetration body is judged to be poor and the penetration body is unqualified. Otherwise, the watertightness of the current penetration body is judged to be good and the penetration body is qualified.

9. The method for manufacturing a multi-core optical fiber sealing penetration component for deep sea use according to claim 7, characterized in that: In step S4, the moving direction of the liquid bag matches the direction of the pressure applied to the cabin penetration member during use.

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