An adaptive sealing structure for deep - sea optical cables and its installation method

Abstract

The present invention discloses an underwater cable sealing device, aiming to provide an optical cable sealing structure that can adaptively adjust the sealing force in a deep-sea environment, so as to solve the problems of insufficient fixed extrusion pressure, limited reliability, and complex installation and maintenance existing in the prior art. A deep-sea optical cable adaptive sealing structure and its installation method are provided. The key technical point is that an elastic sealing structure assembly is arranged in the installation cavity of the outer shell, and the elastic sealing structure assembly can be automatically adjusted according to the seawater pressure borne on the outside of the current outer shell. The compression amount of the elastic seal is realized to achieve the sealing between the elastic seal and the installation cavity and the optical cable. As the sinking depth increases, the external water pressure gradually increases, causing the extrusion force of the elastic seal to gradually increase, so as to adapt to the water pressure changes at different depths and ensure good sealing performance at any depth, enabling the sealing structure to operate stably in the deep-sea environment for a long time. The present invention is applicable to the technical field of underwater optical cables.

Description

Technical Field

[0001] The present invention relates to an underwater cable sealing device, and more specifically, to an adaptive sealing structure for deep-sea optical cables and its installation method. Background Art

[0002] Existing underwater equipment and cable seals usually adopt the stuffing box sealing method. In this method, an elastic seal is filled into the cavity between the cable and the external metal shell, and the seal expands radially by axial extrusion to block fluids. However, during long-term use in a deep-water environment, due to the constant extrusion force on the seal, it cannot be adjusted according to depth changes, which may lead to excessive extrusion force on the cable under non-operating conditions, thereby causing cable creep, and further resulting in seal failure and water leakage problems. In addition, traditional sealing methods have high requirements for installation and maintenance, with complex operations and long time consumption. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an optical cable sealing structure that can adaptively adjust the sealing force in a deep-sea environment to solve the problems of insufficient fixed extrusion force, limited reliability, and complex installation and maintenance in the existing technology.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An adaptive sealing structure for deep-sea optical cables, including an outer shell and an optical cable disposed within the outer shell. An installation cavity is further provided within the outer shell. At least two sets of elastic sealing structure components are provided within the installation cavity. A separation ring is provided between adjacent elastic sealing structure components. The elastic sealing structure component includes a support ring, a sealing pad disposed within the support ring, and a sealing retaining ring disposed between the support ring and the inner wall of the outer shell. Through holes for passing the optical cable are provided within both the support ring and the sealing pad. The diameter of the support ring matches the diameter of the installation cavity.

[0005] The present invention is further configured as follows: A limiting groove is further provided within the support ring. One side of the sealing pad is provided with an installation plane, and the other side is provided with an installation sleeve. The installation sleeve is perpendicular to the installation plane. The size of the installation plane matches the size of the limiting groove. A limiting retaining ring is further provided between the sealing pad and the optical cable. A buffer inclined surface is provided on the installation sleeve.

[0006] The present invention is further configured as follows: A plug is further provided on the outer shell. The position of the plug matches the position of the separation ring. A buffer sleeve is further provided on one side of the outer shell. The buffer sleeve has a protection portion disposed on the outer side of the outer shell and a fixing portion disposed on the inner side of the outer shell. A sealing pressing member is further provided between the fixing portion and the outer shell.

[0007] Preferably, a sealing strip is further provided on the inner wall of the gasket. The sealing strip is configured to enhance the sealing performance between the gasket and the optical cable. The material of the gasket is elastic rubber.

[0008] The present invention is further configured such that: a water diversion channel is further provided on the end face of the outer housing where the buffer sleeve is provided.

[0009] The present invention is further configured such that: a ring groove is further provided on the outer wall of the support ring, and a sealing ring is provided in the ring groove.

[0010] The present invention is further configured such that: the outer diameter of the partition ring matches the inner diameter of the installation cavity, and a plurality of detection holes are uniformly provided along the circumferential direction of the partition ring. The detection holes are used to detect the assembly quality of the elastic sealing structure assembly.

[0011] The present application also provides an installation method for an adaptive sealing structure of a deep - sea optical cable, characterized in that the installation method includes the following steps: S1. Select the outer housing: Select the outer housing with a corresponding size according to the size of the optical cable and the installation depth requirement;

[0012] S2. Install the optical cable: Insert the optical cable into the outer housing and fix it;

[0013] S3. Install the support ring: Sheath the support ring on the optical cable, set a sealing ring on the ring groove of the support ring, and push the support ring along the length direction of the optical cable into the installation cavity of the outer housing to fix the support ring with the installation cavity;

[0014] S4. Install the gasket: Sheath a sealing retaining ring and a gasket on the optical cable, push the sealing retaining ring and the gasket along the length direction of the optical cable into the installation cavity of the outer housing, and make the installation plane of the gasket engage and fix with the limit groove of the support ring;

[0015] S5. Install the partition ring: Sheath the partition ring on the optical cable and push the partition ring along the length direction of the optical cable into the installation cavity of the outer housing and fix it;

[0016] S6. Install the second set of elastic sealing structure assemblies: Install the support ring and the gasket in the same way, and make the support ring and the gasket fixed in the installation cavity;

[0017] S7. Install the sealing press - piece: Insert the sealing press - piece into the installation cavity of the outer housing so that the sealing press - piece compresses the elastic sealing structure assemblies in the installation cavity;

[0018] S8. Install the buffer sleeve: Insert the optical cable into the buffer sleeve, and at the same time insert the fixed part of the buffer sleeve into the sealing press - piece and fix it;

[0019] S9. Install the sealing cover body: Install the sealing cover body on the outer housing so that the installation cavity of the outer housing remains sealed, and complete the overall installation.

[0020] By adopting the above technical solutions, the beneficial effects are as follows: 1. An installation cavity is provided inside the outer shell. An elastic sealing structure assembly is arranged in the installation cavity, and the elastic sealing structure assembly can be automatically adjusted according to the seawater pressure borne on the outer side of the current outer shell. By realizing the compression amount of the elastic seal, the elastic seal and the installation cavity as well as the optical cable are sealed. At the same time, after the above-mentioned sealing structure is put into water and sinks, the external water pressure is introduced through the water diversion channel arranged on the end face of the outer shell. At the same time, as the sinking depth increases, the external water pressure gradually increases, so that the extrusion pressure of the elastic seal gradually increases to adapt to the water pressure changes at different depths, ensuring good sealing performance at any depth, enabling the sealing structure to operate stably in the deep-sea environment for a long time, and the installation and maintenance processes are relatively simple, greatly improving the work efficiency and reliability.

[0021] 2. Further, at least two groups of the elastic sealing structure assemblies are arranged in the installation cavity. The elastic sealing structure assembly includes a support ring, a sealing gasket arranged inside the support ring, and a sealing retaining ring arranged between the support ring and the inner wall of the outer shell. The support ring and the sealing retaining ring form the seal between the elastic sealing structure and the installation cavity. Through holes for passing the optical cable are arranged in both the support ring and the sealing gasket. After the optical cable passes through the support ring and the sealing gasket, a seal is formed between the inner wall of the sealing gasket and the optical cable through the sealing strip arranged on the inner wall of the sealing gasket. Among them, a limiting groove for installing the sealing gasket is arranged in the support ring, and the support ring provides axial sealing for the sealing gasket inside it. A limiting retaining ring is also arranged between the sealing gasket and the optical cable, and the limiting retaining ring prevents the sealing gasket from being extruded or deformed in a high-pressure environment, preventing the "gap biting phenomenon" of the sealing gasket.

[0022] 3. At the same time, the seal of the sealing structure is mainly realized through the support ring and the sealing gasket. Specifically, the sealing gasket needs to quickly respond to the water pressure during the working process and act on the circumference of the optical cable in a timely manner. Therefore, the sealing gasket needs to have sufficient elasticity. So, it is made of a rubber material with a lower hardness and better elasticity during the design. At the same time, during the installation process, the sealing gasket is required to initially seal the optical cable. Therefore, the inner wall of the sealing gasket is provided with a sealing strip for improving the sealing effect with the optical cable. When the sealing gasket is sleeved on the outer side of the optical cable, the sealing effect is improved through the multi-layer sealing strips on its inner wall. And the sealing gasket has an installation plane for connecting with the support ring and an installation sleeve for connecting with the optical cable. The overall structure of the sealing gasket is a "T"-shaped sleeve, and the installation sleeve part of the sealing gasket is provided with a buffer inclined surface. The connection between the sealing gasket and the optical cable is convenient, and a radial locking force can be generated on the sealing gasket after being subjected to the external water pressure. And the sealing gasket is arranged in the limiting groove of the support ring through the installation plane, and the overall contact area is large, so that the axial support force generated by the support ring can act on a larger flat plane, and the support effect is good, effectively preventing the sealing gasket from falling off.

[0023] 4. Also, when installing the above-mentioned sealing structure, in order to reduce the assembly difficulty, improve the overall structural strength after assembly, and at the same time improve the reliability of the sealing structure in the deep-sea environment, the dimensions of the outer shell are selected before assembly. Specifically, the working environment indicators of the environment are detected before assembly, including the working depth and the working environment temperature, and the optimal assembly components are selected according to the working environment indicators, avoiding waste of resources and ensuring the stability of the sealing structure working in the said environment. And, the optical cable and the elastic sealing structure assembly are sequentially installed inside the installation cavity. Since the inner diameter of the installation cavity matches the outer diameter of the support ring, the support ring has a good fixing effect inside the installation cavity. At the same time, there is a ring groove on the support ring, and a sealing ring is arranged in the ring groove. While the support ring supports the inside of the installation cavity, the connection between the support ring and the installation cavity is sealed through the sealing ring. Subsequently, the gasket is inserted into the limiting groove of the support ring. While the gasket is fixed to the support ring, the gasket can be sleeved outside the optical cable, ensuring the sealing performance between the optical cable and the elastic sealing structure assembly. At the same time, the optical cable is fixed through the part of the installation sleeve of the gasket, with good sealing performance and stability. At the same time, the elastic sealing structure assembly is arranged in 2 groups inside the installation cavity, and adjacent elastic sealing structure assemblies are separated by a separating ring, preventing wear between the elastic sealing structure assemblies. At the same time, multiple groups of elastic sealing structure assemblies can further increase the overall structural strength, preventing the sealing structure from being deformed and damaged under the influence of a large water pressure. And, by arranging a sealing pressing member inside the outer shell to press the elastic sealing structure assembly inside the installation cavity, the overall structure is made compact, realizing the axial fixation of the elastic sealing structure assembly and the separating ring inside the installation cavity. At the same time, there is a buffer sleeve inside the sealing pressing member, and the protective part of the buffer sleeve is sleeved outside the optical cable, used to absorb and disperse the stress that may be generated at the connection where the optical cable enters the installation cavity, reducing the damage to the inside of the optical cable. Description of the Drawings

[0024] Figure 1 Structural sectional view of an embodiment of an adaptive sealing structure for a deep-sea optical cable and its installation method of the present invention;

[0025] Figure 2 Structural schematic diagram of the support ring and the gasket of an embodiment of an adaptive sealing structure for a deep-sea optical cable and its installation method of the present invention;

[0026] Figure 3 Specific structural schematic diagram of the separating ring of an embodiment of an adaptive sealing structure for a deep-sea optical cable and its installation method of the present invention;

[0027] Figure 4 Flowchart of the installation method of an embodiment of an adaptive sealing structure for a deep-sea optical cable and its installation method of the present invention;

[0028] Reference numerals in the drawings: 1, outer housing; 2, installation cavity; 3, elastic sealing structure assembly; 4, spacer ring; 41, annular groove; 42, sealing ring; 43, detection hole; 5, support ring; 51, limiting groove; 6, gasket; 61, installation plane; 62, installation sleeve; 63, limiting retaining ring; 64, buffer slope; 65, sealing strip; 7, sealing retaining ring; 8, through hole; 9, plug; 10, buffer sleeve; 101, protection part; 102, fixing part; 11, water diversion channel. Detailed implementation manners

[0029] Refer to Figures 1 to 4 The embodiments of an adaptive sealing structure for deep - sea optical cables and its installation method of the present invention will be further described.

[0030] For ease of description, spatial relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" 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.

[0031] Moreover, relative relationship terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0032] An adaptive sealing structure for deep - sea optical cables includes an outer housing 1 and an optical cable disposed in the outer housing 1. An installation cavity 2 is further provided in the outer housing 1. At least two groups of elastic sealing structure assemblies 3 are provided in the installation cavity 2. A spacer ring 4 is provided between adjacent elastic sealing structure assemblies 3. The elastic sealing structure assembly 3 includes a support ring 5, a gasket 6 disposed in the support ring 5, and a sealing retaining ring 7 disposed between the support ring 5 and the inner wall of the outer housing 1. Through holes 8 for passing the optical cable are provided in both the support ring 5 and the gasket 6. The diameter of the support ring 5 matches the diameter of the installation cavity 2.

[0033] A limiting groove 51 is further provided inside the support ring 5. One side of the gasket 6 is provided with an installation plane 61, and the other side is provided with an installation sleeve 62. The installation sleeve 62 is perpendicular to the installation plane 61. The size of the installation plane 61 matches the size of the limiting groove 51. A limiting retaining ring 63 is further provided between the gasket 6 and the optical cable, and a buffer inclined surface 64 is further provided on the installation sleeve 62.

[0034] A plug 9 is further provided on the outer housing 1. The position of the plug 9 matches the position of the partition ring 4. A buffer sleeve 10 is further provided on one side of the outer housing 1. The buffer sleeve 10 has a protection part 101 provided on the outer side of the outer housing 1 and a fixing part 102 provided on the inner side of the outer housing 1. A sealing pressing member is further provided between the fixing part 102 and the outer housing 1.

[0035] Preferably, a sealing strip 65 is further provided on the inner wall of the gasket 6. The sealing strip 65 is configured to increase the sealing performance between the gasket 6 and the optical cable. The material of the gasket 6 is elastic rubber.

[0036] A water diversion channel 11 is further provided on the end surface of the outer housing 1 where the buffer sleeve 10 is provided.

[0037] A ring groove 41 is further provided on the outer wall of the support ring 5, and a sealing ring 42 is provided in the ring groove 41.

[0038] The outer diameter of the partition ring 4 matches the inner diameter of the installation cavity 2, and a plurality of detection holes 43 are uniformly provided along the circumferential direction of the partition ring 4. The detection holes 43 are used to detect the assembly quality of the elastic sealing structure assembly 3.

[0039] The present application also provides an installation method for an adaptive sealing structure of a deep - sea optical cable, which is characterized in that the installation method includes the following steps: S1. Select the outer housing 1: Select the outer housing 1 with a corresponding size according to the size of the optical cable and the installation depth requirement;

[0040] S2. Install the optical cable: Insert the optical cable into the outer housing 1 and fix it;

[0041] S3. Install the support ring 5: Sheath the support ring 5 on the optical cable, set the sealing ring 42 on the ring groove 41 of the support ring 5, and push the support ring 5 into the installation cavity 2 of the outer housing 1 along the length direction of the optical cable to fix the support ring 5 with the installation cavity 2;

[0042] S4. Install the gasket 6: Sheath the sealing retaining ring 7 and the gasket 6 on the optical cable, push the sealing retaining ring 7 and the gasket 6 into the installation cavity 2 of the outer housing 1 along the length direction of the optical cable, and make the installation plane 61 of the gasket 6 be clamped and fixed with the limiting groove 51 of the support ring 5;

[0043] S5. Install the separation ring 4: Install the separation ring 4 on the optical cable and push the separation ring 4 into the installation cavity 2 of the outer housing 1 along the length direction of the optical cable and fix it;

[0044] S6. Install the second set of elastic sealing structure components 3: Install the support ring 5 and the sealing gasket 6 in the same way, and make the support ring 5 and the sealing gasket 6 fixed in the installation cavity 2;

[0045] S7. Install the sealing press piece: Insert the sealing press piece into the installation cavity 2 of the outer housing 1 so that the sealing press piece presses the elastic sealing structure components 3 in the installation cavity 2;

[0046] S8. Install the buffer sleeve 10: Insert the optical cable into the buffer sleeve 10, and at the same time insert the fixed part 102 of the buffer sleeve 10 into the sealing press piece and fix it;

[0047] S9. Install the sealing cover body: Install the sealing cover body on the outer housing 1 so that the installation cavity 2 of the outer housing 1 is kept sealed, and complete the overall installation.

[0048] By providing an installation cavity 2 in the outer housing 1, an elastic sealing structure component 3 is provided in the installation cavity 2, and the elastic sealing structure component 3 can be automatically adjusted according to the seawater pressure borne on the outside of the current outer housing 1. By realizing the compression amount of the elastic sealing member, the elastic body sealing member is sealed with the installation cavity 2 and the optical cable. At the same time, after the above-mentioned sealing structure is put into water and sinks, the external water pressure is introduced through the water inlet channel 11 provided on the end face of the outer housing 1. At the same time, as the sinking depth increases, the external water pressure gradually increases, so that the extrusion pressure of the elastic sealing member gradually increases to adapt to the water pressure changes at different depths, ensuring good sealing performance at any depth, enabling the sealing structure to operate stably in the deep-sea environment for a long time, and the installation and maintenance processes are relatively simple, greatly improving the work efficiency and reliability.

[0049] Further, at least two sets of the elastic sealing structure components 3 are provided in the installation cavity 2, and the elastic sealing structure component 3 includes a support ring 5, a sealing gasket 6 provided in the support ring 5, and a sealing retaining ring 7 provided between the support ring 5 and the inner end face of the outer housing 1. Among them, the support ring 5 and the sealing retaining ring 7 form a seal between the elastic sealing structure and the installation cavity 2, and through holes 8 for passing the optical cable are provided in both the support ring 5 and the sealing gasket 6. After the optical cable passes through the support ring 5 and the sealing gasket 6, a seal is formed between the optical cable and the inner wall of the sealing gasket 6 through the sealing strip 65 provided on the inner wall of the sealing gasket 6. Among them, a limiting groove 51 for installing the sealing gasket 6 is provided in the support ring 5, and the support ring 5 provides axial sealing for the sealing gasket 6 inside it, and a limiting retaining ring 63 is also provided between the sealing gasket 6 and the optical cable. The limiting retaining ring 63 prevents the sealing gasket 6 from being extruded or deformed in a high-pressure environment and prevents the "gap bite phenomenon" of the sealing gasket 6.

[0050] Meanwhile, the sealing of the sealing structure is mainly achieved by the support ring 5 and the gasket 6. Specifically, the gasket 6 needs to quickly respond to the water pressure during operation and act on the circumference of the optical cable in a timely manner. Therefore, the gasket 6 requires sufficient elasticity. Thus, it is made of a rubber material with a relatively low hardness and good elasticity during design. At the same time, during the installation process, the gasket 6 is required to initially seal the optical cable. Therefore, sealing strips 65 for improving the sealing effect with the optical cable are provided on the inner wall of the gasket 6. When the gasket 6 is sleeved outside the optical cable, the sealing effect is improved through the multiple sealing strips 65 on its inner wall. Moreover, the gasket 6 has an installation plane 61 connected to the support ring 5 and an installation sleeve 62 connected to the optical cable. The overall structure of the gasket 6 is a "T"-shaped sleeve, and a buffer inclined surface 64 is provided on the installation sleeve 62 part of the gasket 6. The gasket 6 is convenient to connect with the optical cable and can generate a radial locking force on the gasket 6 after being subjected to external water pressure. And the gasket 6 is arranged in the limit groove 51 of the support ring 5 through the installation plane 61, with a large overall contact area, so that the axial support force generated by the support ring 5 can act on a relatively large flat plane, and the support effect is good, effectively preventing the gasket 6 from falling off.

[0051] Moreover, when installing the above-mentioned sealing structure, in order to reduce the assembly difficulty, improve the overall structural strength after assembly, and improve the reliability of the sealing structure in the deep-sea environment, the size of the outer casing 1 is selected before assembly. Specifically, the working environment indicators of the environment are detected before assembly, including the working depth and the working environment temperature, and the optimal assembly components are selected according to the working environment indicators, avoiding waste of resources and ensuring the stability of the sealing structure working in the said environment. Moreover, the optical cable and the elastic sealing structure assembly 3 are sequentially installed inside the installation cavity 2. Since the inner diameter of the installation cavity 2 matches the outer diameter of the support ring 5, the support ring 5 has a good fixing effect inside the installation cavity 2. At the same time, the support ring 5 has a ring groove 41, and a sealing ring 42 is arranged in the ring groove 41. When the support ring 5 supports the inside of the installation cavity 2, the connection between the support ring 5 and the installation cavity 2 is sealed by the sealing ring 42. Subsequently, the gasket 6 is inserted into the limiting groove 51 of the support ring 5. While the gasket 6 is fixed to the support ring 5, the gasket 6 can be sleeved outside the optical cable, ensuring the sealing performance between the optical cable and the elastic sealing structure assembly 3. At the same time, the optical cable is fixed by a part of the installation sleeve 62 of the gasket 6, with good sealing performance and stability. Moreover, the elastic sealing structure assembly 3 is arranged in two groups inside the installation cavity 2, and adjacent elastic sealing structure assemblies 3 are separated by a separation ring 4, preventing wear between the elastic sealing structure assemblies 3. At the same time, multiple groups of elastic sealing structure assemblies 3 can further increase the overall structural strength, preventing the sealing structure from being deformed and damaged under the influence of a large water pressure. Moreover, a sealing pressing part is arranged inside the outer casing 1 to press the elastic sealing structure assembly 3 inside the installation cavity 2, making the overall structure compact, realizing the axial fixation of the elastic sealing structure assembly 3 and the separation ring 4 inside the installation cavity 2. At the same time, a buffer sleeve 10 is arranged inside the sealing pressing part, and the protective part 101 of the buffer sleeve 10 is sleeved outside the optical cable, used to absorb and disperse the stress that may be generated at the connection where the optical cable enters the installation cavity 2, reducing the damage to the inside of the optical cable.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary 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. An installation method for an adaptive sealing structure of a deep - sea optical cable, comprising an outer housing (1) and an optical cable disposed within the outer housing (1), characterized in that, An installation cavity (2) is further provided inside the outer shell (1). At least two groups of elastic sealing structure components (3) are provided inside the installation cavity (2). A separation ring (4) is provided between adjacent elastic sealing structure components (3). The elastic sealing structure component (3) includes a support ring (5), a sealing gasket (6) arranged inside the support ring (5), and a sealing retaining ring (7) arranged between the support ring (5) and the inner wall of the outer shell (1). Through holes (8) for passing optical cables are provided inside both the support ring (5) and the sealing gasket (6). The diameter of the support ring (5) matches the diameter of the installation cavity (2). The installation method includes the following steps: S1. Select the outer shell (1): Select the outer shell (1) with corresponding dimensions according to the size of the optical cable and the installation depth requirement. S2. Install the optical cable: Insert the optical cable into the outer shell (1) and fix it. S3. Install the support ring (5): Sheath the support ring (5) on the optical cable, and set a sealing ring (42) in the annular groove (41) of the support ring (5). Push the support ring (5) into the installation cavity (2) of the outer shell (1) along the length direction of the optical cable to fix the support ring (5) with the installation cavity (2). S4. Install the sealing gasket (6): Sheath the sealing retaining ring (7) and the sealing gasket (6) on the optical cable. Push the sealing retaining ring (7) and the sealing gasket (6) into the installation cavity (2) of the outer shell (1) along the length direction of the optical cable, and make the installation plane (61) of the sealing gasket (6) engage and fix with the limiting groove (51) of the support ring (5). S5. Install the separation ring (4): Sheath the separation ring (4) on the optical cable and push the separation ring (4) into the installation cavity (2) of the outer shell (1) along the length direction of the optical cable and fix it. S6. Install the second group of elastic sealing structure components (3): Install the support ring (5) and the sealing gasket (6) in the same way, and fix the support ring (5) and the sealing gasket (6) inside the installation cavity (2). S7. Install the sealing pressing member: Insert the sealing pressing member into the installation cavity (2) of the outer shell (1) so that the sealing pressing member presses the elastic sealing structure components (3) inside the installation cavity (2). S8. Install the buffer sleeve (10): Insert the optical cable into the buffer sleeve (10), and at the same time insert the fixed part (102) of the buffer sleeve (10) into the sealing pressing member and fix it. S9. Install the sealing cover body: Install the sealing cover body on the outer shell (1) so that the installation cavity (2) of the outer shell (1) remains sealed, and complete the overall installation.

2. The installation method of an adaptive sealing structure for a deep - sea optical cable according to claim 1, characterized in that, A limiting groove (51) is further provided inside the support ring (5). One side of the sealing gasket (6) is provided with an installation plane (61), and the other side is provided with an installation sleeve (62). The installation sleeve (62) is perpendicular to the installation plane (61). The size of the installation plane (61) matches the size of the limiting groove (51). A limiting retaining ring (63) is further provided between the sealing gasket (6) and the optical cable. A buffer inclined surface (64) is also provided on the installation sleeve (62).

3. The installation method of an adaptive sealing structure for a deep - sea optical cable according to claim 1, characterized in that, A plug (9) is further provided on the outer shell (1), and the position of the plug (9) is matched with the position of the partition ring (4). A buffer sleeve (10) is further provided on one side of the outer shell (1). The buffer sleeve (10) has a protection part (101) arranged on the outer side of the outer shell (1) and a fixing part (102) arranged on the inner side of the outer shell (1). A sealing pressing member is further provided between the fixing part (102) and the outer shell (1).

4. The installation method of an adaptive sealing structure for a deep - sea optical cable according to claim 2, characterized in that, A sealing strip (65) is further provided on the inner wall of the gasket (6). The sealing strip (65) is configured to increase the sealing performance between the gasket (6) and the optical cable. The material of the gasket (6) is elastic rubber.

5. The installation method of an adaptive sealing structure for a deep-sea optical cable according to claim 1, characterized in that, A water diversion channel (11) is further provided on the end face of the outer shell (1) where the buffer sleeve (10) is arranged.

6. The installation method of an adaptive sealing structure for a deep-sea optical cable according to claim 1, characterized in that, A ring groove (41) is further provided on the outer wall of the support ring (5), and a sealing ring (42) is arranged in the ring groove (41).

7. The installation method of an adaptive sealing structure for a deep-sea optical cable according to claim 1, characterized in that, The outer diameter of the partition ring (4) is matched with the inner diameter of the installation cavity (2), and a plurality of detection holes (43) are uniformly arranged along the circumferential direction of the partition ring (4). The detection holes (43) are used to detect the assembly quality of the elastic sealing structure assembly (3).

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