Photoelectric composite cable connector for coal mine

Abstract

The invention relates to a photoelectric composite cable connector for a coal mine. The optical fiber connecting assembly comprises a ceramic ferrule, a guide sleeve and a floating alignment mechanism, the ceramic ferrule is used for fixing an optical fiber of the photoelectric composite cable, and the floating alignment mechanism is configured to allow the ceramic ferrule to radially float during connection so as to realize automatic alignment of the optical fiber; an electrical connection assembly within the connector body; the sealing assembly comprises a cable locking structure, a first pressing block, a first sealing block, a second pressing block and a sealing bin, and the first pressing block and the second pressing block are matched to apply axial extrusion to the first sealing block; an independent sealing bin is further included, the optical fiber part of the photoelectric composite cable is independently arranged in the bin, and the bin is filled with a second sealing block which deforms under extrusion so as to be tightly attached to the optical fiber protection tube. The optical fiber butt joint precision is optimized through the floating alignment mechanism, the environment protection capability is enhanced by adopting a sealing system, and the transmission stability of the coal mine underground photoelectric composite cable is improved.

Description

Technical Field

[0001] This invention relates to the field of mining cable connection technology; specifically, this invention relates to a photoelectric composite cable connector for coal mines. Background Technology

[0002] With the development of underground coal mining technology and equipment, the requirements for the safety and reliability of underground power supply are becoming increasingly stringent. Underground power lines in coal mines are often dispersed and long, necessitating cable connections for convenient power transmission and routine maintenance. However, the humid environment and high dust levels in coal mines can lead to corrosion at cable connections, potentially causing short circuits and impacting normal production and safety. Furthermore, existing connectors may experience fiber optic end-face displacement during fiber optic cable connections, disrupting stable signal transmission and increasing fiber loss. Summary of the Invention

[0003] In view of this, the present invention provides a photoelectric composite cable connector for coal mines, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0004] To achieve the aforementioned objectives, the present invention provides a photoelectric composite cable connector for coal mines, comprising:

[0005] Connector body;

[0006] An optical fiber connection assembly is disposed within the connector body. The optical fiber connection assembly includes a ceramic ferrule, a guide sleeve, and a floating alignment mechanism. The ceramic ferrule is used to fix the optical fiber of the optoelectronic composite cable. The floating alignment mechanism is disposed within the ceramic ferrule and allows the ceramic ferrule to float along the diameter direction during connection to achieve automatic optical fiber alignment.

[0007] An electrical connection assembly is disposed within the connector body; and

[0008] A sealing assembly is used to seal the interior of the connector body. The sealing assembly includes a cable locking structure, a first pressing block, a first sealing block, a second pressing block, and a sealing chamber arranged in sequence. The first pressing block and the second pressing block cooperate to apply axial compression to the first sealing block. The sealing assembly also includes an independent sealing chamber, in which the optical fiber portion of the optoelectronic composite cable is placed separately. The independent sealing chamber is filled with a second sealing block, which is used to deform under the pressure to fit tightly against the optical fiber protection tube.

[0009] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the optical fiber inside the optoelectronic composite cable is bonded to the ceramic ferrule, and at least two of the ceramic ferrules are inserted into the guide tube, with each ceramic ferrule being equipped with an independent floating alignment mechanism.

[0010] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the guide tube is an open ceramic sleeve, and the outer diameter tolerance and roundness of the ceramic ferrule are controlled at the micrometer level.

[0011] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the independent floating alignment mechanism includes a floating spring and a locking nut; the floating spring provides axial spring force to the ceramic ferrule and allows the ceramic ferrule to float radially; the locking nut adjusts the preload of the floating spring.

[0012] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the cable locking structure is disposed at the front end of the connector to fix the armored steel wire of the optoelectronic composite cable and to achieve the connection between the optoelectronic composite cable and the connector body through mechanical engagement.

[0013] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the optoelectronic composite cable passes sequentially through the cable locking structure, the first pressing block, the first sealing block and the second pressing block into the sealing chamber.

[0014] Both the first clamping block and the second clamping block are connected to the inner wall of the connector body via threads. By tightening the first clamping block and the second clamping block, axial compression is achieved on the first sealing block located in the middle.

[0015] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, an optical fiber fixing device is provided in the independent sealing chamber, and the second sealing block is made of elastic sealing material, which fills the gap in the independent sealing chamber and fits tightly with the optical fiber protection tube to form a gapless seal.

[0016] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, a sealing cover is provided at the rear end of the connector body, and a watertight pin is provided on the sealing cover. The electrical connection assembly is connected to the tension rod unit through the watertight pin passing through the sealing chamber.

[0017] In the aforementioned optoelectronic composite cable connector for coal mines, optionally, the connector body is made of copper.

[0018] The non-metallic seal in the sealing assembly is made of at least one of neoprene rubber or polyurethane.

[0019] In the aforementioned coal mine optoelectronic composite cable connector, optionally, the sealing assembly is designed with radial and axial seals, wherein the radial and axial seals satisfy the following:

[0020]

[0021] Where A represents radial sealing compression, r represents the cross-sectional diameter of the optoelectronic composite cable, H represents the radial sealing groove depth, B represents the axial sealing compression, and h represents the sealing groove height;

[0022] The radial seal compression is designed to be 8% to 12%, and the axial seal compression is designed to be 45% to 55%.

[0023] The photoelectric composite cable connector for coal mines of the present invention optimizes the fiber optic docking accuracy through a floating alignment mechanism and strengthens environmental protection capabilities through a sealing system, thereby improving the transmission stability of photoelectric composite cables in underground coal mines and contributing to the safe production and intelligent upgrading of coal mines. Attached Figure Description

[0024] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the fiber optic floating structure of an embodiment of the optoelectronic composite cable connector for coal mines of the present invention.

[0026] Figure 2 This is a schematic diagram of the sealing structure of an embodiment of the photoelectric composite cable connector for coal mines of the present invention.

[0027] Figure 3 Vibration curve diagram of vibration performance test of an embodiment of the photoelectric composite cable connector for coal mines of the present invention;

[0028] Figure 4 The figure shows the test results of a deviation loss comparison test for an embodiment of the photoelectric composite cable connector for coal mines according to the present invention.

[0029] Reference numerals: 1-Floating spring; 2-Ceramic ferrule; 3-Guide sleeve; 4-Positioning pin; 5-Locking nut; 6-Mating end face; 7-Contact element; 8-Insulating plate; 9-Matching cable; 91-Optical fiber; 92-Communication cable; 93-Ceramic sleeve; 94-Steel wire; H-Radial sealing groove depth; h-Sealing groove height; r-Cross-sectional diameter of optoelectronic composite cable. Detailed Implementation

[0030] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of the photoelectric composite cable connector for coal mines of the present invention will be described below by way of example; however, all descriptions should not be construed as limiting the present invention in any way.

[0031] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various figures, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, and thus these further embodiments according to the present invention should also be considered within the scope of this description.

[0032] It should also be noted that the terms "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the photoelectric composite cable connector for coal mines shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0034] It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Because communication cables and optical fiber cables in optoelectronic composite cables have different performance characteristics, and because they are subjected to different interference factors in the complex electromagnetic and physical environment of underground coal mines, a single connection structure is often insufficient to meet both requirements. For example, optical fibers are extremely sensitive to micro-bending losses, while power cables need to withstand significant mechanical tension. Based on this, one embodiment of the present invention provides an optoelectronic composite cable connector that can simultaneously satisfy the requirements of optical fiber cable sealing and stable electrical signal transmission.

[0036] When connecting fiber optic composite cables in underground coal mines, the cross-sections of the two optical cables need to be aligned. In this embodiment, during connection, the outer diameter tolerance and roundness of the ceramic ferrule 2 for mounting the optical fiber are controlled within the micrometer level. For example, the roundness of the ceramic ferrule 2 for mounting the optical fiber is controlled within ±0.005mm. Optical cable connection errors typically include axial deviation, off-axis deviation, and angular deviation. To specifically avoid these problems, this embodiment employs a floating alignment structure for fiber optic composite cable connection. This floating structure is as follows... Figure 1 As shown.

[0037] Reference Figure 1 As shown, the optical fiber inside the optoelectronic composite cable is bonded to the ceramic ferrule 2. Two ceramic ferrules 2 are inserted into the guide sleeve 3. Each ferrule is equipped with an independent floating alignment mechanism, allowing it to float relative to the contact 7 and insulation plate 8 assembly along the diametrical direction. The contact 7 serves a dual function of electrical connection and mechanical support, while the insulation plate 8 ensures electrical isolation between signal channels, preventing leakage or signal crosstalk. A tail shank is provided at the tail of the ceramic ferrule 2 for fiber optic insertion and protection. Exemplarily, the guide sleeve 3 is an open ceramic sleeve. This open design has a certain degree of elasticity, providing appropriate clamping force when the ferrules are inserted, ensuring a tight fit between the two ferrules at the mating surfaces while allowing the axis to automatically align within a small range.

[0038] For example, the floating alignment mechanism employs a floating spring 1, the preload of which can be adjusted by a locking nut 5. The floating spring 1 is sleeved on the outside of the ceramic ferrule 2 or its tail shank. When the connector is mated, the spring is compressed, generating axial top pressure to ensure physical contact between the fiber end face (i.e., the mating end face 6). The locking nut 5 is not only used to fix the spring position, but can also be rotated to adjust the compression stroke of the spring to accommodate optical cable assemblies with different tolerances. Furthermore, within the range allowing for radial micro-movement of the ceramic ferrule 2, the circumferential rotation and axial displacement of the ceramic ferrule 2 are limited by the positioning pin 4, ensuring that the ferrule remains within the preset floating track under the action of the spring, avoiding misalignment or damage to the fiber end face due to excessive offset. This embodiment, through the design of the internal fiber alignment mechanism of the optoelectronic composite cable, meets the requirements for the coordinated transmission of optical and electrical signals.

[0039] To address the dark and damp environment of underground coal mines, this embodiment employs a multi-layered protection system in the connector's sealing process, such as... Figure 2 As shown.

[0040] Reference Figure 2As shown, the front end of the optoelectronic composite cable connector (right end of the connector in the figure) is equipped with a cable locking structure to fix the cable armor steel wire 94 and ensure a stable connection between the optoelectronic composite cable and the connector through mechanical engagement. The mechanical engagement can use a clamping ring with reverse teeth or a conical sleeve. When the locking nut is tightened, the reverse teeth embed into the armor layer, thereby withstanding a large axial tensile force, preventing the cable from being accidentally pulled out, and protecting the fragile internal optical fiber connection points from external pulling. The optical fiber part 91 and the communication cable part 92 of the optoelectronic composite cable pass through the cable locking sleeve, the first clamping block, the first sealing block, and the second clamping block in sequence before entering the sealing chamber. The first and second clamping blocks are connected to the inner wall of the cylinder by threads. The tightening process achieves axial compression of the first sealing block in the middle. When subjected to axial compression, the first sealing block expands radially, thereby tightly wrapping the cable sheath passing through it, forming the first waterproof barrier, laying the foundation for the subsequent sealing of the optoelectronic composite cable connector.

[0041] The optoelectronic composite cable connector also features an independent sealed chamber for the optical fiber section 91. This is because optical fibers are more sensitive to moisture corrosion; even a small amount of moisture entering can cause micro-cracks to propagate on the fiber surface or lead to hydrogen loss, increasing transmission loss. The optical fiber section 91 of the optoelectronic composite cable is placed separately within this chamber, which contains an optical fiber fixing device. The gaps are filled with a second sealing block made of elastic material. This sealing block deforms under pressure, tightly fitting against the optical fiber protective tube to form a gapless seal.

[0042] The optoelectronic composite cable connector is equipped with a sealing cap at the rear end. The watertight pin on the cap allows the communication cable section 92 to pass through the sealed chamber and connect to the tension rod unit, enabling the transmission of power and signals. The watertight pin typically employs glass sintering or high-performance potting processes to ensure airtightness between the pin body and the metal housing, preventing water from seeping into the device along the conductor gaps even if external water flooding occurs.

[0043] Optionally, in order to further enhance the reliability of the seal of the optoelectronic composite cable connector, the cross-sectional compression of the radial seal and axial seal of the sealing system is designed, and the calculation of the sealing compression is shown in formula (1).

[0044]

[0045] In the above formula (1), A represents radial sealing, r represents the cross-sectional diameter of the optoelectronic composite cable, H represents the radial sealing groove depth, B represents axial sealing, and h represents the sealing groove height.

[0046] For example, the radial seal compression is between 8% and 12%, and the axial seal compression is between 45% and 55%. For instance, if the cable cross-section diameter r is 20 mm, the radial seal groove depth H is 18 mm, and the seal groove height h is 10 mm, then according to formula (1), A = 10% and B = 50%. This design is intended to ensure that the sealing material can effectively fill the sealing space without causing material failure or a decrease in sealing performance due to excessive compression.

[0047] The aforementioned sealing system design for the optoelectronic composite cable connector in coal mines combines mechanical locking with elastic sealing to ensure the connection reliability of the optoelectronic composite cable in complex underground working conditions. Furthermore, the multiple sealing measures of the sealing chamber further block the interference of underground moisture and dust on the transmission of the optoelectronic composite cable, providing a double guarantee for the stable transmission of the optoelectronic composite cable.

[0048] One embodiment of the present invention specifically designs the key materials and parameters of the connector. By optimizing the materials of the optoelectronic composite cable connector and determining the main technical parameters, the connector's performance is ensured while resisting interference from factors such as moisture and dust in underground coal mines.

[0049] Due to the humid environment and corrosive gases present in underground mines, the connector body material must possess excellent corrosion resistance. Metals with superior corrosion resistance are less prone to forming a corrosion layer in humid environments, exhibiting a stable surface condition and minimal change in resistance.

[0050] After exposing various metals to a downhole environment for 30 days, their resistance values ​​were measured. The results showed that the initial resistance of silver was 0.0083Ω, and the resistance after exposure was 0.269Ω; the initial resistance of brass was 0.011Ω, and the resistance after exposure was 4.01Ω; the initial resistance of copper was 0.083Ω, and the resistance after exposure was 1.33Ω; the initial resistance of nickel was 0.087Ω, and the resistance after exposure was 3090Ω; and the initial resistance of tin was 0.031Ω, and the resistance after exposure was 0.131Ω.

[0051] It can be seen that after 30 days of exposure in a humid underground environment, the resistivity values ​​of copper, tin, and silver changed little. This indicates that these metals are not prone to forming a high-resistivity oxide layer due to corrosion in humid environments, and these three metals can be used for plating in the joint contact area of ​​the connector. Considering casting performance, structural strength, and cost, this embodiment selects copper as the main material for the connector. Its excellent casting performance can meet the structural strength requirements of connectors under complex underground working conditions, thus ensuring reliable protection of internal components under such conditions.

[0052] For the non-metallic seals of the optoelectronic composite cable connector, this embodiment uses neoprene rubber and polyurethane materials. These materials have excellent corrosion resistance and are suitable for the humid environment of underground coal mines. Specifically, neoprene rubber has good oil resistance and flame retardancy, making it suitable for the oil and gas environment that may exist in coal mines; while polyurethane material has extremely high abrasion resistance and tear strength, effectively resisting wear and maintaining long-term resilience during frequent disassembly and assembly or cable swinging, preventing seal failure.

[0053] As an example, the main technical parameters of the connector in this embodiment are set as follows: model LGB-315 / 3.3, rated voltage 5kV, rated current 200A, withstand current 3.15~8.11kA, cable dimensions 504mm×125mm×164mm, and power frequency withstand voltage 20kV. The withstand current parameter is specifically designed to fully account for potential short-circuit impacts in the underground power grid, ensuring that the connector does not undergo welding or explosion before the fault is cleared. These parameters are designed for the complex underground environment of coal mines, guaranteeing the safety and reliability of fiber optic composite cable transmission in coal mines.

[0054] For example, when installing and using the optoelectronic composite cable connector, first check the compatibility between the cable model and the connector grade. Then, suspend the connector on the side wall of the tunnel where there is no water. The suspension position should be at least 230 mm above the cable, and the two ends of the cable should be slightly drooping so that the condensate flowing down the cable drips at the lowest point, avoiding the water flow directly impacting the connector seal, so as to reduce the impact of environmental factors on performance.

[0055] To verify the performance of the connector in this embodiment, a series of tests were conducted, including sealing performance tests, vibration performance tests, and deviation loss comparison tests.

[0056] In a sealing performance test, the connector was mounted on a fixture and then placed in a sealed container, which was filled with water and pressurized. During this process, the fiber optic cable end connected to the connector was kept stable. After 50 minutes, the connector was removed and inspected for internal leakage. The results showed no leakage during or after the test. Secondary performance testing showed that all connector specifications remained consistent with pre-test performance, and the insulation resistance met the connector's design requirements. This test verified the reliability of the connector's sealing structure, demonstrating its ability to effectively prevent underground liquids from penetrating the connector during operation in coal mines, thus providing a foundation for stable connector operation.

[0057] In a vibration performance test, the connector was mounted on a vibration table using a fixture, and vertical radial and horizontal axial vibration tests were performed. The vibration frequency of the vibration table was set to 10–50 Hz, and the acceleration was set to 88 m / s², with each test lasting 30 minutes. The vibration curves recorded during the test are shown below. Figure 3 As shown. According to Figure 3 As shown, the vibration curve remained between the upper and lower warning limits, indicating that the connector and optical cable maintained a meshed state throughout the vibration test without any loosening. An internal inspection after the test revealed that the optical cable section remained intact, verifying the connector's structural stability and its ability to operate stably for extended periods under complex downhole conditions.

[0058] In a deviation loss comparison test, to simulate the full lifespan of the connector, the coal mine optoelectronic composite cable connector of this embodiment was subjected to manual insertion and removal tests along with three other connectors. The force and angle of operation were strictly controlled during the insertion and removal process to minimize human error. After the test, the performance of the four connectors was tested, with a total of 400 insertion and removal operations completed. The results are as follows: Figure 4 As shown. Figure 4 The comparison results show that the loss of each connector increases with the number of mating and unmating cycles. However, the connector in this embodiment has a deviation loss of only 0.6 dB after 400 mating and unmating operations, while the deviation losses of the three compared connectors are 2.7 dB, 1.8 dB, and 3.0 dB, respectively. The connector in this embodiment is equipped with an independent floating alignment mechanism for each ceramic ferrule 2. Test results verify that this mechanism can effectively eliminate deviation interference during the mating and unmating process, thus ensuring the transmission stability of the optoelectronic composite cable under frequent mating and unmating conditions and providing a guarantee for the reliable operation of the connector.

[0059] In summary, the optoelectronic composite cable connectors for coal mines according to some embodiments of the present invention have one or more of the following beneficial effects: by equipping each ferrule with an independent floating alignment mechanism, axial, off-axis, and angular deviations are effectively eliminated; a multi-layer sealing system, combining mechanical locking and elastic sealing, blocks interference from underground moisture and dust, improving sealing performance; copper is selected as the main material, and neoprene rubber and polyurethane are used as sealing materials, and key parameters adapted to the underground environment are set, ensuring the structural strength and corrosion resistance of the connector. In conclusion, this connector can achieve stable connection of optoelectronic composite cables in coal mines, providing technical support for safe production and intelligent upgrading in coal mines.

[0060] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A photoelectric composite cable connector for coal mines, characterized in that, include: Connector body; An optical fiber connection assembly is disposed within the connector body. The optical fiber connection assembly includes a ceramic ferrule (2), a guide sleeve (3), and a floating alignment mechanism. The ceramic ferrule (2) is used to fix the optical fiber of the optoelectronic composite cable. The floating alignment mechanism is disposed within the ceramic ferrule (2) and allows the ceramic ferrule (2) to float along the diameter direction during connection to achieve automatic optical fiber alignment. An electrical connection assembly is disposed within the connector body; and A sealing assembly is used to seal the interior of the connector body. The sealing assembly includes a cable locking structure, a first pressing block, a first sealing block, a second pressing block, and a sealing chamber arranged in sequence. The first pressing block and the second pressing block cooperate to apply axial compression to the first sealing block. The sealing assembly also includes an independent sealing chamber, in which the optical fiber portion of the optoelectronic composite cable is placed separately. The independent sealing chamber is filled with a second sealing block, which is used to deform under the pressure to fit tightly against the optical fiber protection tube.

2. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The optical fiber inside the optoelectronic composite cable is bonded to the ceramic ferrule (2), and at least two ceramic ferrules (2) are inserted into the guide tube. Each ceramic ferrule (2) is equipped with an independent floating alignment mechanism.

3. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The guide tube is an open ceramic sleeve, and the outer diameter tolerance and roundness of the ceramic insert (2) are controlled at the micrometer level.

4. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The independent floating alignment mechanism includes a floating spring (1) and a locking nut (5); the floating spring (1) is used to provide axial elastic force to the ceramic ferrule (2) and allow the ceramic ferrule (2) to float radially; the locking nut (5) is used to adjust the preload of the floating spring (1).

5. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The cable locking structure is located at the front end of the connector and is used to fix the armored steel wire (94) of the optoelectronic composite cable, and to connect the optoelectronic composite cable to the connector body through mechanical engagement.

6. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The optoelectronic composite cable passes sequentially through the cable locking structure, the first pressing block, the first sealing block, and the second pressing block into the sealing chamber; Both the first clamping block and the second clamping block are connected to the inner wall of the connector body via threads. By tightening the first clamping block and the second clamping block, axial compression is achieved on the first sealing block located in the middle.

7. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The independent sealed chamber is equipped with an optical fiber fixing device. The second sealing block is made of elastic sealing material, which fills the gap in the independent sealed chamber and fits tightly with the optical fiber protection tube to form a gapless seal.

8. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The connector body has a sealing cover at its rear end, and a watertight pin is provided on the sealing cover. The electrical connection assembly is connected to the tension rod unit through the watertight pin passing through the sealing chamber.

9. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The connector body is made of copper; The non-metallic seal in the sealing assembly is made of at least one of neoprene rubber or polyurethane.

10. The photoelectric composite cable connector for coal mines according to claim 1, characterized in that, The sealing assembly is designed with radial and axial seals, and the radial and axial seals satisfy the following: Where A represents radial sealing compression, r represents the cross-sectional diameter of the optoelectronic composite cable, H represents the radial sealing groove depth, B represents the axial sealing compression, and h represents the sealing groove height; The radial seal compression is designed to be 8% to 12%, and the axial seal compression is designed to be 45% to 55%.

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