An oil-filled cable and dry cable connection terminal

Abstract

The application relates to the technical field of connecting structures between oil-filled cables and dry cross-linked cables, and discloses an oil-filled cable and dry cable connecting terminal, which comprises an oil-filled cable joint, a concave-convex crimping groove is arranged in the inside of the oil-filled cable joint, an oil-filled cable sheath is fixedly installed in the concave-convex crimping groove, a wedge-shaped groove is further arranged in the inside of the oil-filled cable joint, a pressing block is fixedly connected in the inside of the wedge-shaped groove, a sealing rubber ring is fixedly connected to the head of the oil-filled cable joint, an oil-filled adapter shell is fixedly installed at one end of the oil-filled cable joint through sealing screw one, and sealing screw two is arranged on the outer wall of the oil-filled cable sheath. The oil-filled cable and dry cable connecting terminal has the advantages of ingenious structure, reliable sealing principle, power switching and signal transmission functions under the condition of large water depth, multi-point sealing and bearing design, and each sealing point has on-site construction detectability.

Description

Technical Field

[0001] This invention relates to the field of connection structure technology between oil-filled cables and dry cross-linked cables, specifically to a connection terminal for oil-filled cables and dry cables. Background Technology

[0002] Oil-filled cables primarily use low-viscosity electrical insulating oil as the filling medium. Because the insulating oil itself has very low compressibility, an oil circuit compensation system allows the cable to maintain its internal and external pressure balance in a seawater environment, thus improving the cable's pressure resistance. Oil-filled cables have excellent insulation performance, low dielectric loss, good heat dissipation, and lighter weight, making them widely used in marine operations such as ROVs and oil and gas well development. Due to the special medium of oil-filled cables, the cable sheaths and connectors have special requirements. They must have oil-filled interfaces, reliable oil seals, and high material tolerance, resulting in limited applicability of cable connectors and other accessories, often requiring custom-made interfaces. Compared to oil-filled cable connectors and accessories, dry-type cables have a wider range of accessories, higher product diversity, and a higher degree of standardization.

[0003] Therefore, in the field of marine engineering, there is often a need to connect oil-filled cables and dry cables. Inventing a reliable connection structure that can ensure that the insulating oil of the oil-filled cable does not overflow, and can also meet the electrical performance requirements of the wires, optical fibers and other elements inside the cable, and realize the connection between oil-filled cables and dry cables, is one of the important technical problems that urgently need to be solved in the current development of deep sea. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a connection terminal for oil-filled cables and dry cables.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a connection terminal for oil-filled cables and dry-type cables, comprising an oil-filled cable connector, wherein the interior of the oil-filled cable connector has a concave-convex crimping groove, an oil-filled cable sheath is fixedly installed in the concave-convex crimping groove, the interior of the oil-filled cable connector also has a wedge-shaped groove, a clamping block is fixedly connected inside the wedge-shaped groove, a sealing ring is fixedly connected to the head of the oil-filled cable connector, an oil-filled adapter shell is fixedly installed at one end of the oil-filled cable connector by a sealing screw, a second sealing screw is provided on the outer wall of the oil-filled cable sheath, the oil-filled cable connector is connected to a dry-type adapter shell through the oil-filled adapter shell, the dry-type adapter shell is fixedly connected to the oil-filled adapter shell by a set screw, a through-cabin terminal is provided inside the dry-type adapter shell, a wiring terminal is provided inside the through-cabin terminal, a through-cabin panel is provided inside the dry-type adapter shell, and the through-cabin panel... The external structure is sealed. A limit ring is provided on the through-cabin panel. A large cavity is opened on the right side of the through-cabin panel. The interior of the dry-type adapter shell contains a load-bearing cavity and a sealing cavity. A load-bearing ring and a push cap are provided in the load-bearing cavity. Wedge block one and wedge block two are also provided inside the load-bearing cavity. Push screws are installed in wedge block one and wedge block two. A groove is opened inside wedge block one. A limit ring is provided on the push cap. A sleeve is provided in the sealing cavity. A sealing ring is provided inside the sleeve. A dry-type cable sheath is provided in the sealing cavity. Soft filler is adhered to the dry-type cable sheath. A sealing cap is provided on the outside of wedge block one. A nut is provided at the tail of the dry-type adapter shell. An expansion rubber and a top block are provided on the dry-type cable sheath. A rubber sleeve is adhered to the dry-type cable sheath with sealant. A clamp is provided on the rubber sleeve.

[0006] In this embodiment of the invention, the oil-filled cable connector is made of a seawater corrosion-resistant material.

[0007] In this embodiment of the invention, an airtightness test port is provided at the sealing interface between the dry adapter shell and the oil-filled adapter shell to test the reliability of their fit.

[0008] In this embodiment of the invention, a step is provided on the right side of the through-cabin panel to withstand the high-voltage environment in the oil-filled cable sheath on the left side, with a withstand voltage rating of up to 10,000 psi.

[0009] In this embodiment of the invention, the soft filler is a sealing filler agent with room temperature curing properties, which can be bonded to the dry cable sheath to achieve a sealing function.

[0010] In this embodiment of the invention, the through-tank panel, wiring terminals, through-tank terminals and limiting retaining ring together constitute the key components for dry and wet separation, realizing the separation of the oil-filled area and the dry tank area, and the structural components that can withstand high water pressure.

[0011] In this embodiment of the invention, the load-bearing ring, the push cap, and the internal wedge block one and wedge block two together form the first load-bearing zone, while the nut, the top block, and the expansion rubber together form the second load-bearing zone, which improves the cable's load-bearing capacity and resistance to bending and torsion.

[0012] In this embodiment of the invention, the sleeve, sealing ring, sealing cover and soft filler are important areas for sealing dry cables. This area also has a longitudinal sealing function, which can prevent oil leakage into the right cavity due to accidental damage to the through panel, and can still keep the oil from entering the interior of the dry cable.

[0013] In this embodiment of the invention, the expanding rubber is honeycomb porous. The expanding rubber has a porous design and is soft. When it is squeezed by the top block, its structure will change. The honeycomb porous design will increase the contact friction between it and the dry cable sheath, which can resist greater cable tension. The function of the clamp is to ensure that the sealant can be operated under pressure and to keep the position of the rubber sleeve fixed.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides an oil-filled cable and a dry cable connection terminal, which has the following advantages: 1. This oil-filled cable and dry cable connection terminal has an ingenious structure and a reliable sealing principle. It can realize the functions of power transfer and signal transmission in deep water conditions. It features multi-point sealing and load-bearing design, and each sealing point is testable on-site.

[0015] 2. This type of oil-filled cable and dry cable connection terminal solves the problems of unreliable conversion and unreliable sealing. The system's redundant design ensures safe construction under special conditions at sea. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the first cross-section structure of the present invention; Figure 4 This is a schematic diagram of the second cross-section structure of the present invention.

[0017] In the diagram: 1. Oil-filled cable connector; 2. Oil-filled cable sheath; 3. Clamping block; 4. Oil-filled adapter shell; 5. Sealing screw one; 6. Sealing ring; 7. Sealing screw two; 8. Set screw; 9. Dry-type adapter shell; 10. Limiting ring; 11. Through-cabin terminal; 12. Through-cabin panel; 13. Wiring terminal; 14. Limiting ring; 15. Push screw; 16. Push cap; 17. Wedge block one; 18. Wedge block two; 19. Load-bearing ring; 20. Sealing cover; 21. Soft filler; 22. Sealing ring; 23. Sleeve; 24. Expanding rubber; 25. Top block; 26. Nut; 27. Rubber sleeve; 28. Sealing adhesive; 29. ​​Clamp; 30. Dry-type cable sheath. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] like Figure 1-4As shown, this invention provides a connection terminal for oil-filled cables and dry cables, including an oil-filled cable connector 1 made of seawater corrosion-resistant material. The oil-filled cable connector 1 has an internal crimping groove, in which an oil-filled cable sheath 2 is fixedly installed. The oil-filled cable connector 1 also has a wedge-shaped groove, in which a clamping block 3 is fixedly connected. A sealing ring 6 is fixedly connected to the head of the oil-filled cable connector 1. One end of the oil-filled cable connector 1 is fixedly installed with an oil-filled adapter shell 4 via a sealing screw 5. A second sealing screw 7 is provided on the outer wall of the oil-filled cable sheath 2. The oil-filled cable connector 1 is connected to a dry-type adapter shell 9 via the oil-filled adapter shell 4. An airtightness tester is provided at the sealing interface between the dry-type adapter shell 9 and the oil-filled adapter shell 4. The test port can be used to check the reliability of the fit between the two. The dry-type adapter shell 9 is fixedly connected to the oil-filled adapter shell 4 by the set screw 8. The dry-type adapter shell 9 has a through-chamber terminal 11 inside, and a wiring terminal 13 inside the through-chamber terminal 11. The dry-type adapter shell 9 also has a through-chamber panel 12 inside, and a sealing structure is provided on the outside of the through-chamber panel 12. A step is provided on the right side of the through-chamber panel 12 to withstand the high-pressure environment in the oil-filled cable sheath 2 on the left side. The withstand pressure rating can reach 10,000 psi. A limit ring 10 is provided on the through-chamber panel 12. A large cavity is opened on the right side of the through-chamber panel 12. The dry-type adapter shell 9 has a load-bearing cavity and a sealing cavity inside. The load-bearing cavity is equipped with a load-bearing ring 19 and a push cap 16. The load-bearing cavity also has a... The system includes a wedge-shaped block 17 and a wedge-shaped block 18, each containing a push screw 15. The wedge-shaped block 17 has an internal groove. A limit ring 14 is provided on the push cap 16. A sleeve 23 is placed in the sealed cavity, and a sealing retaining ring 22 is located inside the sleeve 23. A dry cable sheath 30 is placed in the sealed cavity, and a soft filler 21 is bonded to the dry cable sheath 30. The soft filler 21 is a sealing filler with room temperature curing properties, allowing it to bond with the dry cable sheath 30 and provide a sealing function. A sealing cap 20 is provided on the outside of the wedge-shaped block 17. A nut 26 is provided at the tail of the dry adapter shell 9. An expansion rubber 24 and a top block 25 are provided on the dry cable sheath 30. The dry cable sheath 30... A rubber sleeve 27 is bonded to the cable via sealant 28. A clamp 29 is installed on the rubber sleeve 27. The through-cabin panel 12, terminal block 13, through-cabin terminal block 11, and limit ring 10 together form a key component for dry-wet separation, achieving the separation of the oil-filled area and the dry compartment area. This is a structural component that can withstand high water pressure. The load-bearing ring 19, push cap 16, and internal wedge blocks 17 and 18 together form the first load-bearing area. The nut 26, top block 25, and expansion rubber 24 together form the second load-bearing area, improving the cable's load-bearing capacity and resistance to bending and torsion. The sleeve 23, sealing ring 22, sealing cover 20, and soft filler 21 are important areas for sealing the dry cable. This area also has a longitudinal sealing function, preventing oil leakage into the right-side cavity due to accidental damage to the through-cabin panel 12.It can still prevent oil from seeping into the interior of the dry cable. The expanding rubber 24 has a honeycomb porous design. The expanding rubber 24 is soft and its structure changes when squeezed by the top block 25. The honeycomb porous design increases the contact friction between it and the dry cable sheath 30, which can withstand greater cable tension. The clamp 29 functions to ensure that the sealant 28 can be applied under pressure and to keep the rubber sleeve 27 in a fixed position.

[0023] The working principle of this type of oil-filled cable and dry cable connection terminal will be explained in detail below.

[0024] like Figure 1-4As shown, during use, the oil-filled cable connector 1 is made of seawater corrosion-resistant material and has internal concave-convex crimping grooves to fully compress the oil-filled cable sheath 2. The clamping block 3 and the internal wedge-shaped groove of the oil-filled cable connector 1 are engaged together by a clamping device, making the fit between the oil-filled cable sheath 2 and the oil-filled cable connector 1 more secure and greatly enhancing the internal pressure-bearing capacity. The head of the oil-filled cable connector 1 has a sealing ring 6 and a threaded structure. The main function of the oil-filled adapter shell 4 is to connect the oil-filled cable connector 1 and the dry-type adapter shell 9. The sealing screw 5 is the sealing screw for the airtightness test port on it, and the sealing screw 7 is the sealing screw for the oil-filled cable filling port on it. The dry-type adapter shell 9 and the oil-filled adapter shell 4 are engaged together by the set screw 8, and there is also an airtightness test port at its sealing interface to test the reliability of the fit between the two. The through-tank terminal 11 is a special structure made with a special process to withstand high water pressure and has a wiring terminal 13 inside. (e.g., wire terminals or optical terminals) The through-cabin panel 12 is sintered from a special material and has an external sealed structure. The right side of the through-cabin panel 12 has a step to withstand the high-voltage environment in the oil-filled cable sheath 2 on the left side, with a withstand voltage rating of up to 10,000 psi. The limit ring 10 limits the axial movement and radial rotation of the through-cabin panel 12. The wiring terminal 13 electrical terminals have various wiring methods, such as crimping, welding, and screw fixing. The voltage rating can meet 2000V, the current can reach 50A, and the electrical insulation rating is greater than 1GΩ. The wiring terminal 13 optical terminals have various forms, including: single-mode 9μm, multi-mode 50μm / 125μm or 62, 5μm / 125μm. The right side of the through-cabin panel 12 has a large cavity, the main function of which is to facilitate the assembly and storage of wires or optical cables. The dry-type adapter shell 9 also has two cavities inside, one of which is a load-bearing cavity and the other is a sealed cavity.The load-bearing cavity is mainly composed of a load-bearing ring 19 and a push cap 16. Inside, there are two wedge blocks, 17 and 18. The push screw 15 allows relative sliding between wedge blocks 17 and 18. Wedge block 17 has internal grooves that compress the inner sheath of the cable, increasing the contact friction between the wedge blocks 1-17 and the cable sheath, thus achieving a greater load-bearing capacity. The limiting ring 14 positions the push cap 16. The sleeve 23 is the main part of the sealing area, with a sealing ring 6 and an internal sealing retaining ring 22, which also has a sealing ring and a radial stop device. The soft filler 21 is a sealing filler with room-temperature curing properties, which can be bonded to the dry cable sheath 30 for sealing. Functionally, the sealing cap 20 serves both sealing and filling functions, maintaining the centered positioning of the dry cable; the nut 26 and the tail of the dry adapter shell 9 form another load-bearing area; the expanding rubber 24 has a porous design and is soft; when squeezed by the top block 25, its structure changes, and the honeycomb porous design increases its contact friction with the dry cable sheath 30, resisting greater cable tension; the rubber sleeve 27 is molded from soft material, and its main function is to provide a mold and protection for the sealant 28; the sealant 28 also has properties such as cable bending and torsion resistance; the sealant 28 is injected by pressure injection; the clamp 29 functions to ensure that the sealant 28 can be operated under pressure and to keep the rubber sleeve 27 in a fixed position.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A connection terminal for oil-filled cables and dry cables, comprising an oil-filled cable connector (1), characterized in that: The oil-filled cable connector (1) has a concave-convex crimping groove inside, and an oil-filled cable sheath (2) is fixedly installed in the concave-convex crimping groove. The oil-filled cable connector (1) also has a wedge-shaped groove inside, and a clamping block (3) is fixedly connected inside the wedge-shaped groove. A sealing ring (6) is fixedly connected to the head of the oil-filled cable connector (1). An oil-filled adapter shell (4) is fixedly installed at one end of the oil-filled cable connector (1) by a sealing screw one (5). A sealing screw two (7) is provided on the outer wall of the oil-filled cable sheath (2). 1) A dry adapter shell (9) is connected to an oil-filled adapter shell (4). The dry adapter shell (9) is fixedly connected to the oil-filled adapter shell (4) by a set screw (8). A through-tank terminal (11) is provided inside the dry adapter shell (9). A wiring terminal (13) is provided inside the through-tank terminal (11). A through-tank panel (12) is provided inside the dry adapter shell (9). A sealing structure is provided on the outside of the through-tank panel (12). A limit ring (10) is provided on the through-tank panel (12). The right side of the through-tank panel (12) is open. The dry-type adapter shell (9) has a large cavity. Inside the dry-type adapter shell (9) are a load-bearing cavity and a sealing cavity. The load-bearing cavity contains a load-bearing ring (19) and a push cap (16). Inside the load-bearing cavity are two wedge blocks (17 and 18), each containing a push screw (15). The wedge block (17) has a groove. The push cap (16) has a limit ring (14). The sealing cavity contains a sleeve (23). The sleeve (23) has a... A sealing retaining ring (22) is provided, a dry cable sheath (30) is provided in the sealed cavity, a soft filler (21) is bonded to the dry cable sheath (30), a sealing cap (20) is provided on the outside of the wedge block (17), a nut (26) is provided at the tail of the dry adapter shell (9), an expansion rubber (24) and a top block (25) are provided on the dry cable sheath (30), a rubber sleeve (27) is bonded to the dry cable sheath (30) by a sealant (28), and a clamp (29) is provided on the rubber sleeve (27).

2. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: The oil-filled cable connector (1) is made of a seawater corrosion resistant material.

3. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: An airtightness test port is provided at the sealing interface between the dry adapter shell (9) and the oil-filled adapter shell (4).

4. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: A step is provided on the right side of the cabin panel (12).

5. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: The soft filler (21) is a sealing filler.

6. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: The expanded rubber (24) is honeycomb porous.

7. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: The through-cabin panel (12), wiring terminal (13), through-cabin terminal (11) and limiting retaining ring (10) together constitute the key components for dry and wet separation.

8. The oil-filled cable and dry-type cable connection terminal according to claim 1, characterized in that: The load-bearing ring (19), the push cap (16), and the internal wedge block one (17) and wedge block two (18) together form the first load-bearing zone, while the nut (26), the top block (25), and the expansion rubber (24) together form the second load-bearing zone.

9. A connection terminal for oil-filled cables and dry cables according to claim 1, characterized in that: The sleeve (23), sealing ring (22), sealing cap (20) and soft filler (21) are important areas for sealing dry cables.

Images