Underwater cable joint sealing device
The design of soft sleeve and fastening ring solves the problem of poor sealing of underwater cable joints, achieving a highly efficient and reliable sealing effect and avoiding air leakage and water seepage caused by temperature differences.
Patent Information
- Application Number
- CN202423056793.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Poor sealing at underwater cable joints can easily lead to water leakage, especially due to uneven pressure inside and outside the sealing tube caused by temperature differences, resulting in air leakage.
It adopts a soft sleeve structure with an internal rubber gasket and fastening ring design. By tightening and loosening the fastening ring, the rubber gasket can be tightly fitted to the cable end, forming a low-pressure space and avoiding excessive pressure caused by temperature difference.
It achieves effective sealing of underwater cable joints, avoids water leakage problems, and provides a long-lasting and highly reliable seal.
Smart Images
Figure CN223553025U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cables, specifically to an underwater cable joint sealing device. Background Technology
[0002] Currently, underwater cables are widely used, playing a vital role in communication signal transmission, power transmission, connection between underwater and shore-based equipment, and applications in special environments. Specifically, underwater cables enable long-distance communication and, through fiber optic technology, achieve high-speed, high-capacity information transmission, providing reliable guarantees for international network communication, telephone communication, and data transmission. They minimize interference from external factors and avoid the limitations of overhead power lines that rely on towers, thus becoming an important communication link between different countries and regions. In addition, underwater cables can achieve cross-regional and even cross-border power transmission, providing a stable power supply to islands far from the mainland and offshore oil platforms.
[0003] To ensure stable transmission of underwater cables, reliable waterproof sealing is required at the cable joints. Currently, underwater cable joints are generally sealed using a sealing tube connection. However, in practical applications, it has been found that cables generate heat during power transmission, while underwater temperatures are lower. This results in a temperature difference between the inside and outside of the sealing tube at the cable joint, specifically, the temperature inside the sealing tube is higher than the temperature outside, leading to increased internal pressure and potential air and water leakage between the sealing tube and the cable, thus causing cable failure. Therefore, this application proposes an underwater cable joint sealing device. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide an underwater cable joint sealing device to solve the technical problem that the current underwater cable joints have poor sealing effect and are prone to water leakage and failure.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an underwater cable connector sealing device, comprising a soft sleeve fitted onto the cable end, with rubber gaskets provided at both ends inside the soft sleeve, the rubber gaskets fitted onto the cable end and fitting against the surface of the cable end, a gap between the inner wall of the soft sleeve and the outer wall of the cable end, a first tightening ring fitted at each end of the soft sleeve corresponding to the rubber gasket, and a second tightening ring fitted at the middle of the soft sleeve.
[0006] The present invention is further provided that the inner walls at both ends of the soft sleeve are provided with limiting bosses, and the limiting bosses are arranged in a circle along the inner wall of the soft sleeve and are fitted with rubber gaskets.
[0007] The present invention is further configured such that a pair of baffles are provided on the outer circular surfaces of both ends of the soft sleeve, the baffles are arranged in a circle around the soft sleeve, and the first fastening ring is distributed between the pair of baffles.
[0008] The present invention is further configured such that both the first fastening ring and the second fastening ring include a metal ring, the metal ring being formed by bending a metal sheet, one end of the metal ring having a pair of first extension plates extending therefrom, and the other end of the metal ring having a second extension plate extending therefrom, the second extension plate being inserted into the pair of first extension plates, and the ends of the first extension plates and the second extension plates being respectively provided with a first connecting lug and a second connecting lug that bend outward toward the metal ring.
[0009] The present invention is further configured such that a screw is provided on the second connecting ear plate, and a connecting block is rotatably connected between a pair of first connecting ear plates, wherein the connecting block is threadedly engaged with the screw.
[0010] The present invention is further configured such that the soft sleeve is composed of two substrates, with a braided layer sandwiched between the two substrates, and an anti-corrosion coating is provided on the surface of the outer substrate.
[0011] The present invention is further configured such that the anti-corrosion coating is formed by applying epoxy coal tar pitch coating, the braided layer is formed by braiding stainless steel wire, and the substrate material is rubber.
[0012] In summary, the present invention has the following main advantages:
[0013] This invention utilizes a design with first fastening rings at both ends of a flexible sleeve, a second fastening ring in the middle of the flexible sleeve, and a gap between the inner wall of the flexible sleeve and the outer wall of the cable end. The flexible sleeve is fitted onto the connection point of two cable ends, with rubber gaskets at both ends of the flexible sleeve respectively fitted onto the two cable ends. When the second fastening ring retracts, it compresses and contracts the middle portion of the flexible sleeve, forcing a reduction in the space between the inner wall of the flexible sleeve and the cable end. Air within this space is then expelled from between the rubber gaskets and the cable end. Furthermore, the first fastening ring... The rings are fitted onto both ends of the flexible sleeve and tightened, forcing the rubber gaskets to fit tightly against the cable ends, thus sealing the connection between the two cable ends. In this sealing structure, after the second fastening ring is loosened, the elastic return of the flexible sleeve itself creates a low-pressure space between the inner wall of the flexible sleeve and the cable end. Combined with the tightening of the first fastening rings at both ends of the flexible sleeve, this ensures that the rubber gaskets fit tightly against the cable ends, preventing the temperature difference between the inside and outside of the flexible sleeve from causing excessive internal pressure and leakage. This achieves an effective seal at the connection between the two cable ends, providing a long-lasting and highly reliable seal. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the internal structure of the flexible sleeve of this utility model;
[0016] Figure 3 This is a schematic diagram of the structural layers of the flexible sleeve of this utility model;
[0017] Figure 4 This utility model Figure 2 Enlarged view of point A in the image;
[0018] Figure 5 This is a schematic diagram of the structure of the first fastening ring of this utility model.
[0019] In the diagram: 1. Cable end; 2. Soft sleeve; 3. Rubber gasket; 4. First fastening ring; 5. Second fastening ring; 6. Substrate; 7. Anti-corrosion coating; 8. Braided layer; 9. Limiting boss; 10. Stop bar; 11. Metal ring; 12. First extension strip; 13. Second extension strip; 14. First connecting ear plate; 15. Second connecting ear plate; 16. Screw; 17. Connecting block. Detailed Implementation
[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0021] An underwater cable connector sealing device, such as Figures 1-5As shown, the device includes a flexible sleeve 2 fitted onto the cable end 1. Rubber gaskets 3 are provided at both ends of the flexible sleeve 2. The rubber gaskets 3 are fitted onto the cable end 1 and fit against its surface. A gap exists between the inner wall of the flexible sleeve 2 and the outer wall of the cable end 1. First tightening rings 4 are fitted at both ends of the flexible sleeve 2 corresponding to the positions of the rubber gaskets 3. A second tightening ring 5 is fitted at the middle of the flexible sleeve 2. With this structure, after the cable end 1 is connected to another cable end 1, the cable end 1 is fitted onto the connection point of the two cable ends 1. The rubber gaskets 3 at both ends of the flexible sleeve 2 are fitted onto the two cable ends 1 respectively. The second tightening ring 5 is fitted onto the middle of the flexible sleeve 2 and tightened, compressing and shrinking the middle of the flexible sleeve 2. The space between the inner wall of the flexible sleeve 2 and the cable end 1 is reduced, and the air in the space between the inner wall of the flexible sleeve 2 and the cable end 1 is squeezed out from between the rubber gasket 3 and the cable end 1. Then, the first fastening ring 4 is fitted onto both ends of the flexible sleeve 2 and tightened, forcing the rubber gasket 3 to fit tightly and seal the cable end 1, thus completing the seal at the connection of the two cable ends 1. After the second fastening ring 5 is loosened, a low-pressure space is formed between the inner wall of the flexible sleeve 2 and the cable end 1. With the tightening of the first fastening ring 4 at both ends of the flexible sleeve 2, the rubber gasket 3 fits tightly with the cable end 1, avoiding the problem of excessive internal pressure and air leakage caused by temperature difference between the inside and outside of the flexible sleeve 2. Thus, the purpose of effectively sealing the connection of the two cable ends 1 is achieved, and the sealing effect is long-lasting and highly reliable.
[0022] In this embodiment, limiting bosses 9 are provided on the inner walls of both ends of the soft sleeve 2. The limiting bosses 9 are arranged in a circle along the inner wall of the soft sleeve 2 and are fitted with rubber gaskets 3 to prevent the rubber gaskets 3 from coming out of the two ends of the soft sleeve 2. A pair of baffles 10 are provided on the outer circular surfaces of both ends of the soft sleeve 2. The baffles 10 are arranged in a circle around the soft sleeve 2. The first fastening ring 4 is distributed between the pair of baffles 10 and is used to limit the first fastening ring 4.
[0023] In this embodiment, both the first fastening ring 4 and the second fastening ring 5 include a metal ring 11, which is formed by bending a metal sheet. One end of the metal ring 11 is provided with a pair of first extension plates 12, and the other end of the metal ring 11 is provided with a second extension plate 13. The second extension plate 13 is inserted into the pair of first extension plates 12. The ends of the first extension plates 12 and the second extension plates 13 are respectively provided with a first connecting lug 14 and a second connecting lug 15 that bend outward toward the metal ring 11. Pushing the first connecting lug... The first connecting ear plate 14 and the second connecting ear plate 15 move toward each other, which can expand the metal ring 11. After the first connecting ear plate 14 and the second connecting ear plate 15 are loosened, the metal ring 11 returns to its original position and contracts. A screw 16 is provided on the second connecting ear plate 15. A connecting block 17 is rotatably connected between a pair of first connecting ear plates 14. The connecting block 17 is threadedly engaged with the screw 16. Tightening the screw 16 makes the first connecting ear plate 14 and the second connecting ear plate 15 continuously move closer, which can achieve the continuous tightening of the metal ring 11, thereby achieving the purpose of tightening the first fastening ring 4 and the second fastening ring 5.
[0024] Furthermore, the flexible sleeve 2 consists of two substrate layers 6, with a braided layer 8 sandwiched between them. The outer substrate 6 surface is coated with an anti-corrosion coating 7, which is an epoxy coal tar pitch coating, possessing chemical resistance, resistance to microbial erosion, and long-term stability, ensuring the underwater durability of the flexible sleeve 2. The braided layer 8 is made of stainless steel wire, improving the overall robustness and durability of the flexible sleeve 2. The substrate 6 is made of rubber, suitable for underwater environments.
[0025] The working principle of this utility model is as follows: In use, the flexible sleeve 2 is pre-fitted onto the cable end 1. After the cable end 1 is connected to another cable end 1, the flexible sleeve 2 is pushed to the connection point of the two cable ends 1. The rubber gaskets 3 at both ends of the flexible sleeve 2 are respectively fitted onto the two cable ends 1. Then, the second fastening ring 5 is fitted onto the middle position of the flexible sleeve 2. By turning the screw 16, the second fastening ring 5 is tightened, squeezing and contracting the middle position of the flexible sleeve 2, forcing the space between the inner wall of the flexible sleeve 2 and the cable end 1 to shrink. Air in the space between the inner wall of the flexible sleeve 2 and the cable end 1 is then released from between the rubber gaskets 3 and the cable end 1. The material is squeezed out, and then the first fastening ring 4 is fitted onto both ends of the flexible sleeve 2 and tightened, forcing the rubber gasket 3 to fit tightly and seal the cable end 1. Finally, the second fastening ring 5 is loosened, thus completing the seal at the connection of the two cable ends 1. This sealing structure creates a low-pressure space between the inner wall of the flexible sleeve 2 and the cable end 1. Combined with the tightening of the first fastening ring 4 at both ends of the flexible sleeve 2, this ensures that the rubber gasket 3 fits tightly with the cable end 1, preventing the problem of excessive internal pressure and air leakage caused by temperature differences between the inside and outside of the flexible sleeve 2. This achieves the purpose of effectively sealing the connection of the two cable ends 1, and the sealing effect is long-lasting and highly reliable.
[0026] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. An underwater cable joint sealing device, comprising a soft sleeve (2) fitted onto the cable end (1), characterized in that: Rubber gaskets (3) are provided at both ends of the soft sleeve (2). The rubber gaskets (3) are fitted on the cable end (1) and fit against the surface of the cable end (1). There is a gap between the inner wall of the soft sleeve (2) and the outer wall of the cable end (1). At the positions corresponding to the rubber gaskets (3) at both ends of the soft sleeve (2), a first fastening ring (4) that can be tightened is fitted. At the middle position of the soft sleeve (2), a second fastening ring (5) that can be tightened is fitted.
2. The underwater cable joint sealing device according to claim 1, characterized in that: The soft sleeve (2) has limiting bosses (9) on the inner walls at both ends. The limiting bosses (9) are arranged in a circle along the inner wall of the soft sleeve (2) and are fitted with rubber gaskets (3).
3. The underwater cable joint sealing device according to claim 1, characterized in that: A pair of baffles (10) are provided on the outer circular surfaces of both ends of the soft sleeve (2). The baffles (10) surround the soft sleeve (2) in a circle. The first fastening ring (4) is distributed between the pair of baffles (10).
4. The underwater cable joint sealing device according to claim 1, characterized in that: The first fastening ring (4) and the second fastening ring (5) both include a metal ring (11), which is formed by bending a metal sheet. One end of the metal ring (11) is provided with a pair of first extension plates (12), and the other end of the metal ring (11) is provided with a second extension plate (13). The second extension plate (13) is inserted into the pair of first extension plates (12). The ends of the first extension plates (12) and the second extension plates (13) are respectively provided with a first connecting ear plate (14) and a second connecting ear plate (15) that bend and extend outward toward the metal ring (11).
5. The underwater cable joint sealing device according to claim 4, characterized in that: A screw (16) is provided on the second connecting ear plate (15), and a connecting block (17) is rotatably connected between a pair of first connecting ear plates (14), wherein the connecting block (17) is threadedly engaged with the screw (16).
6. The underwater cable joint sealing device according to claim 1, characterized in that: The soft sleeve (2) is composed of two substrates (6), with a braided layer (8) sandwiched between the two substrates (6), and an anti-corrosion coating (7) is provided on the surface of the outer substrate (6).
7. The underwater cable joint sealing device according to claim 6, characterized in that: The anti-corrosion coating (7) is formed by applying epoxy coal tar pitch coating, the braided layer (8) is made of stainless steel wire, and the substrate (6) is made of rubber.